阅读说明：本技术 一种双壁空心墩柱与盖梁的连接节点及建造方法 (Connecting node of double-wall hollow pier stud and capping beam and construction method ) 是由 陈光明 陆奕辰 饶琛辉 林佐宏 谢攀 成彤 李召兵 胡福南 刘伟楠 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种双壁空心墩柱与盖梁的连接节点,双壁空心墩柱与盖梁之间通过第一转换段及盖梁转换段固定连接,或通过第一转换段、第二转换段及盖梁转换段固定连接；当通过第一转换段、第二转换段与盖梁转换段固定连接时,第一转换段内钢管的底部通过第一钢隔板与双壁空心墩柱的钢管顶部连接,顶部通过第二钢隔板与第二转换段内钢骨连接,第二转换段内钢骨的顶部伸入盖梁转换段内与盖梁转换段内钢骨连接；当通过第一转换段及盖梁转换段连接时,第一转换段内钢管的底部通过第一钢隔板与双壁空心墩柱的钢管顶部连接,顶部伸入盖梁转换段内与盖梁转换段内钢骨固定连接。本发明具有适用范围广、连接可靠、节点区刚度变化平缓、抗震性能良好等优点。(The invention discloses a connecting node of a double-wall hollow pier stud and a bent cap, wherein the double-wall hollow pier stud and the bent cap are fixedly connected through a first conversion section and a bent cap conversion section, or through the first conversion section, a second conversion section and the bent cap conversion section; when the steel pipe is fixedly connected with the bent cap conversion section through the first conversion section and the second conversion section, the bottom of the steel pipe in the first conversion section is connected with the top of the steel pipe of the double-wall hollow pier stud through the first steel partition plate, the top of the steel pipe is connected with the steel skeleton in the second conversion section through the second steel partition plate, and the top of the steel skeleton in the second conversion section extends into the bent cap conversion section and is connected with the steel skeleton in the bent cap conversion section; when the first conversion section and the bent cap conversion section are connected, the bottom of the steel pipe in the first conversion section is connected with the top of the steel pipe of the double-wall hollow pier stud through the first steel partition plate, and the top of the steel pipe extends into the bent cap conversion section and is fixedly connected with the steel bones in the bent cap conversion section. The invention has the advantages of wide application range, reliable connection, smooth change of the rigidity of the node area, good earthquake resistance and the like.)

1. The utility model provides a connected node of hollow pier stud of double-walled and bent cap, the hollow pier stud of double-walled is including the clad material pipe that is located the outside, be located the intraductal steel pipe of clad material and be located the concrete layer between clad material pipe and the steel pipe, its characterized in that: the double-wall hollow pier stud is fixedly connected with the bent cap through a first conversion section and a bent cap conversion section, or through the first conversion section, a second conversion section and the bent cap conversion section;

the bent cap conversion section comprises a steel rib in the bent cap conversion section and a concrete layer of the bent cap conversion section;

the first conversion section comprises a first conversion section composite pipe positioned on the outer side, a first conversion section inner steel pipe positioned in the first conversion section composite pipe and a first conversion section concrete layer positioned between the first conversion section composite pipe and the first conversion section inner steel pipe, and the first conversion section inner steel pipe is internally provided with a steel pipe concrete layer and an anchor bolt;

the second conversion section comprises a second conversion section composite pipe positioned on the outer side, a second conversion section inner steel rib positioned in the second conversion section composite pipe and a second conversion section concrete layer positioned between the second conversion section composite pipe and the second conversion section inner steel rib;

when the bent cap is fixedly connected with the bent cap conversion section through the first conversion section and the second conversion section, the bottom of a steel pipe in the first conversion section is fixedly connected with the top of the steel pipe of the double-wall hollow pier stud through a first steel partition plate, the top of the steel pipe is fixedly connected with the bottom of a steel rib in the second conversion section through a second steel partition plate, the top of the steel rib in the second conversion section extends into the bent cap conversion section and is fixedly connected with the steel rib in the bent cap conversion section, a composite pipe of the double-wall hollow pier stud, the composite pipe of the first conversion section and the composite pipe of the second conversion section are integrally manufactured and sleeved at corresponding positions to be fixed, and the bent cap is fixedly connected with the bent cap conversion section through the steel rib in the bent cap conversion section;

when through first conversion section and bent cap conversion section fixed connection, the bottom of steel pipe in the first conversion section is through the steel pipe top fixed connection of first steel baffle and double-walled hollow pier stud, and the top stretches into in the bent cap conversion section with bent cap conversion section in steel bone fixed connection, and the compound material pipe of double-walled hollow pier stud and the integrative preparation of first conversion section compound material pipe are overlapped and are fixed to the relevant position, and the bent cap passes through in the bent cap conversion section steel bone and bent cap conversion section fixed connection.

2. The connection node of the double-wall hollow pier stud and the capping beam according to claim 1, wherein 1 or more steel pipes are arranged in the double-wall hollow pier stud, and 1 or more steel pipes are arranged in the first conversion section; the steel pipe of the double-wall hollow pier stud and the interior of the steel pipe of the first conversion section are respectively provided with 1 cavity, or are divided into 2 or more than 2 cavities by steel plates.

3. The connection node of the double-wall hollow pier stud and the capping beam according to claim 1, wherein the cross-sectional profile of the composite pipe of the double-wall hollow pier stud, the steel pipe of the double-wall hollow pier stud, the composite pipe of the first conversion section, the composite pipe of the second conversion section and the steel pipe in the first conversion section is any one of circular, oval, square, rectangular or polygonal; the section profiles of the composite pipe of the double-wall hollow pier stud and the steel pipe of the double-wall hollow pier stud are the same or different; the section profile shapes of the composite pipe of the first conversion section and the steel pipe in the first conversion section are the same or different.

4. The connecting joint of the double-wall hollow pier stud and the capping beam according to claim 1, wherein the cross-sectional profile of the steel rib in the second conversion section is any one of an I shape, a cross shape, a T shape and an L shape.

5. The connection node of the double-wall hollow pier stud and the capping beam according to claim 1, wherein the first steel partition plate is connected with the steel pipe of the double-wall hollow pier stud and the steel pipe in the first conversion section by any one of welding, riveting and bolting; the second steel clapboard is connected with the steel pipe in the first conversion section and the steel skeleton in the second conversion section through any one of welding, riveting and bolting; the steel pipe in the first conversion section or the steel skeleton in the second conversion section is connected with the steel skeleton in the bent cap conversion section in any one mode of welding, riveting and bolting.

6. The connecting joint of the double-wall hollow pier stud and the capping beam as claimed in claim 1, wherein the cross-sectional profile of the steel rib in the capping beam transition section is any one of an I-shaped, T-shaped and U-shaped.

7. The connecting joint of the double-wall hollow pier stud and the capping beam as claimed in claim 1, wherein when the steel rib in the capping beam conversion section is in an i shape, a reinforcing ring plate is arranged between the steel rib in the first conversion section or the steel rib in the second conversion section and the flange of the steel rib in the capping beam conversion section.

8. The connection node of the double-walled hollow pier stud and the capping beam according to claim 1, wherein the capping beam is any one of a steel capping beam, a concrete filled steel tube capping beam, a steel reinforced concrete capping beam and a reinforced concrete capping beam.

9. A prefabricated construction method of a double-walled hollow pier stud and cap beam connection node according to any one of claims 1 to 8, which comprises the steps of:

when the prefabricated connecting joint of the first conversion section and the capping beam conversion section is built, a first steel partition plate is fixed at the bottom of a steel pipe in the first conversion section, and a composite pipe of the first conversion section is sleeved outside the steel pipe in the first conversion section, so that the composite pipe of the first conversion section can extend into the position of a concrete protection layer of the capping beam conversion section; extending the top of the steel pipe in the first conversion section out of the composite pipe in the first conversion section, and extending the top of the steel pipe in the first conversion section to or out of the top of the steel rib in the capping beam conversion section; fixing steel ribs in the bent cap conversion section and steel pipes in a first conversion section extending into the bent cap conversion section, and pouring concrete between the composite pipe of the first conversion section and the steel pipes in the first conversion section, in the steel pipes in the first conversion section and in the bent cap conversion section to obtain prefabricated connecting nodes;

when the prefabricated connecting nodes of the first conversion section, the second conversion section and the capping beam conversion section are built, fixing a first steel partition plate at the bottom of the steel pipe in the first conversion section, fixing a second steel partition plate at the top of the steel pipe in the first conversion section, and pouring concrete into the steel pipe in the first conversion section; fixing the bottom of the steel rib in the second conversion section on a second steel partition plate; the first conversion section composite pipe and the second conversion section composite pipe are integrally manufactured and are integrally sleeved outside the steel pipe in the first conversion section and the steel rib in the second conversion section, so that the second conversion section composite pipe extends into the position of the concrete protection layer of the cover beam conversion section; extending the top of the steel rib in the second conversion section out of the composite pipe of the second conversion section, and extending the top of the steel rib in the second conversion section to or out of the top of the steel rib in the conversion section of the cover beam; and fixing the steel bones in the bent cap conversion section and the steel bones in the second conversion section extending into the bent cap conversion section, and pouring concrete between the composite material pipe of the first conversion section and the steel pipe in the first conversion section, between the composite material pipe of the second conversion section and the steel bones in the second conversion section and in the bent cap conversion section to obtain the prefabricated connecting node.

10. A cast-in-place construction method using the double-walled hollow pier stud and capping beam connection node of claims 1 to 8, which comprises the steps of:

when the double-wall hollow pier stud and the capping beam are fixedly connected through the first conversion section and the capping beam conversion section, the first steel partition plate is fixedly connected to the top of the steel pipe of the double-wall hollow pier stud; fixing the bottom of the steel pipe in the first conversion section on a first steel partition plate; the composite pipe of the double-wall hollow pier stud and the composite pipe of the first conversion section are manufactured integrally and are correspondingly sleeved on the outer sides of the double-wall hollow pier stud steel pipe and the inner steel pipe of the first conversion section; extending the top of the steel pipe in the first conversion section to or out of the top of the steel skeleton in the bent cap conversion section, and extending the composite pipe in the first conversion section to the position of the concrete protection layer in the bent cap conversion section; fixing steel ribs in the bent cap conversion section and a first conversion section inner steel pipe extending into the bent cap, and pouring concrete layers between a composite material pipe and a steel pipe of the double-wall hollow pier stud, between the first conversion section composite material pipe and the first conversion section inner steel pipe, in the bent cap conversion section and in the bent cap to complete cast-in-situ construction of the connecting node of the double-wall hollow pier stud and the bent cap;

when the double-wall hollow pier stud and the capping beam are fixedly connected through the first conversion section, the second conversion section and the capping beam conversion section, the first steel partition plate is fixedly connected to the top of the steel pipe of the double-wall hollow pier stud; fixing the bottom of the steel pipe in the first conversion section on a first steel partition plate; fixing a second steel clapboard on the top of the steel pipe in the first conversion section and pouring concrete into the steel pipe in the first conversion section; fixing the bottom of the steel rib in the second conversion section on a second steel partition plate; the composite pipe of the double-wall hollow pier stud, the composite pipe of the first conversion section and the composite pipe of the second conversion section are manufactured integrally and are correspondingly sleeved outside the steel pipe of the double-wall hollow pier stud, the steel pipe in the first conversion section and the steel rib in the second conversion section, so that the composite pipe of the second conversion section extends into the position of the concrete protection layer of the conversion section of the capping beam; extending the top of the steel rib in the second conversion section out of the composite pipe of the second conversion section, and extending the top of the steel rib in the second conversion section to or out of the top of the steel rib in the conversion section of the cover beam; fixing the steel ribs in the bent cap conversion section and the steel ribs in the second conversion section extending into the bent cap, and pouring concrete layers between the composite material pipe and the steel pipe of the double-wall hollow pier stud, between the composite material pipe of the first conversion section and the steel pipe in the first conversion section, between the composite material pipe of the second conversion section and the steel ribs, in the bent cap conversion section and in the bent cap to complete the cast-in-place construction of the connecting node of the double-wall hollow pier stud and the bent cap.

Technical Field

The invention belongs to the field of civil engineering, and particularly relates to a connecting node of a double-wall hollow pier column and a capping beam, and a construction method of the connecting node of the hollow pier column and the capping beam.

Background

The composite pipe-concrete-steel pipe double-wall hollow member is a new type combined member provided by Tenglo professor, and is formed from external composite pipe, internal hollow steel pipe and sandwich concrete between them. In the composite pipe-concrete-steel pipe double-wall hollow component, the composite pipe on the outer side has excellent corrosion resistance, and the inner steel pipe can be protected in a corrosive environment; meanwhile, the fiber winding direction of the composite pipe is in the annular direction or close to the annular direction, so that lateral restraint can be provided for the interlayer concrete, and shear-resistant bearing capacity is provided. The existence of the inner steel pipe reduces the self weight of the double-wall hollow component, the outward buckling of the double-wall hollow component is limited by concrete, and the strength of steel can be more effectively utilized. The sandwich concrete is simultaneously restrained by the composite outer pipe and the steel inner pipe, so that the column has excellent ductility and seismic performance. It can be seen that the three materials functionally achieve the effect of "1 +1+1> 3", with a superior combination effect. The combined member is particularly suitable for pier column structures in bridge engineering, can fully exert the advantages of good earthquake resistance and strong corrosion resistance, can avoid the defect of insufficient fire resistance of fiber reinforced composite materials, and has wide application prospect.

The pier capping beam is a cross beam arranged at the top of the bent frame pier column and used for supporting, distributing and transmitting the load of an upper structure. Therefore, it is critical to ensure the safety of the bridge to achieve reliable connection between the pier and the capping beam. At present, the connection of concrete piers and steel pipe concrete piers and capping beams has a mature technology. However, the reliable connection node between the composite pipe-concrete-steel pipe double-wall hollow pier stud and the capping beam is still a technical problem to be solved in the practical engineering application of the composite pipe-concrete-steel pipe double-wall hollow pier stud.

Chinese patent document CN 211646756U discloses a three-dimensional fabricated beam-column node structure, which converts a composite pipe/steel tube-confined reinforced concrete column into steel tube concrete through a cover plate, and then connects the composite pipe/steel tube-confined reinforced concrete beam based on connection section steel outside the steel tube concrete. The node is suitable for connecting the beam column of the frame structure in the field of house construction, but has poor connection applicability to the pier column and the capping beam in the field of bridges.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a connecting node of a composite pipe-concrete-steel pipe double-wall hollow pier column and a capping beam, so as to solve the technical problem of connection of the composite pipe-concrete-steel pipe double-wall hollow pier column and the capping beam.

In order to achieve the purpose, the invention provides a connecting node of a composite pipe-concrete-steel pipe double-wall hollow pier column and a steel reinforced concrete cover beam, wherein the double-wall hollow pier column comprises a composite pipe positioned at the outer side, a steel pipe positioned in the composite pipe and a concrete layer positioned between the composite pipe and the steel pipe, and the connection of the double-wall hollow pier column and the cover beam is realized through the following three conversion sections: the steel reinforced concrete composite pipe comprises a composite pipe-concrete-steel pipe double-pipe solid concrete column (a double-pipe solid column for short) conversion section (a first conversion section), a composite pipe constraint steel reinforced concrete column conversion section (a second conversion section) and a steel reinforced concrete bent cap conversion section (a bent cap conversion section); the double-wall hollow pier stud can be connected with the bent cap sequentially through the first conversion section, the second conversion section and the bent cap conversion section (connection mode I), and can also be connected with the bent cap through the first conversion section and the bent cap conversion section (connection mode II); when the connection mode I is adopted, the steel pipe in the double-wall hollow pier stud is connected with the steel pipe in the first conversion section through the first steel partition plate, the steel pipe in the first conversion section is connected with the lower end of the steel skeleton in the second conversion section through the second steel partition plate, then the upper end of the steel skeleton in the second conversion section extends into the bent cap conversion section and is connected with the steel skeleton in the bent cap conversion section, and finally the steel skeleton in the bent cap conversion section is fixedly connected with the bent cap; and when the connection mode II is adopted, the steel pipe of the double-wall hollow pier stud is connected with the steel pipe in the first conversion section through the first steel partition plate, then the upper end of the steel pipe in the first conversion section extends into the bent cap conversion section and is connected with the steel rib in the bent cap conversion section, and finally the steel rib in the bent cap conversion section is fixedly connected with the bent cap.

Preferably, 1 steel pipe can be arranged in the range of the double-wall hollow pier stud and the first conversion section, and a plurality of (the number of the steel pipes is 2 or more) steel pipes are also arranged; the steel pipe can be a single-cavity steel pipe, and can also be divided into a plurality of cavities (the number of cavities is 2 or more) by a steel plate.

Preferably, the cross-sectional profile shapes of the composite pipes and the steel pipes in the range of the double-wall hollow pier stud, the composite pipes and the steel pipes in the range of the first conversion section and the composite pipes in the range of the second conversion section can be one of circular, oval, square, rectangular or polygonal; the sectional profiles of the composite pipe and the steel pipe may be the same or different.

Preferably, the shape of the cross-sectional profile of the steel skeleton in the second conversion section can be one of an I shape, a cross shape, a T shape and an L shape.

Preferably, the cross-sectional outer contour dimension and thickness of the first steel partition plate are not less than the outer contour dimensions and thicknesses of the steel pipe in the double-wall hollow pier stud and the steel pipe in the first conversion section, and the outer contour dimension and thickness of the second steel partition plate are not less than the outer contour dimensions and thicknesses of the steel pipe in the first conversion section and the steel skeleton in the second conversion section. The outer contour dimension of the steel partition plate is not less than that of the steel pipe or the steel rib, so that the steel partition plate can be connected with the steel pipe or the steel rib on two sides at the same time, the steel partition plate is ensured to reliably transfer internal force, and construction is more convenient (if the outer contour dimension of the steel partition plate is less than that of the steel pipe, welding of the inner partition plate in the steel pipe is needed, and construction is inconvenient); the thickness of the steel clapboard is not less than that of the steel pipe wall or the steel rib, so that the rigidity of the steel clapboard outside the plane is ensured, the steel clapboard does not deform greatly under the action of load transmitted by the steel rib or internal concrete, and a certain shearing-resistant bearing capacity is provided.

Preferably, the first steel partition plate is connected with the steel pipes of the double-wall hollow pier stud and the steel pipes in the first conversion section through welding (a bolt connection mode and a riveting connection mode can also be adopted, however, the connection modes need to be provided with connecting plates, construction is complex, efficiency is low, welding is the connection mode which is most convenient and simple in construction and good in reliability); the second steel clapboard is connected with the steel pipe in the first conversion section and the steel skeleton in the second conversion section in a welding way (the connection way of bolting and riveting can also be adopted, but the connection way needs to be provided with a connecting plate, so the construction is more complex, the efficiency is not high; the steel pipe in the first conversion section or the steel skeleton in the second conversion section is connected with the steel skeleton in the bent cap conversion section in any one mode of welding, riveting and bolting.

Preferably, the second steel clapboard is provided with concrete pouring round holes or square holes, and the diameter or the side length of each hole is within the range of 50mm-300 mm.

Preferably, the height ranges of the first conversion section and the second conversion section are both 100mm-3000 mm; the heights of the first conversion section and the second conversion section can be the same or different.

Preferably, the cross section outline shape of the steel skeleton in the bent cap conversion section can be one of an I shape, a T shape and a U shape; the steel bars can be arranged on the outer side of the steel rib or not.

Preferably, when the steel rib in the bent cap conversion section is in an i shape, a reinforcing ring plate is arranged between the steel pipe in the first conversion section or the steel rib in the second conversion section and the flange of the steel rib in the bent cap conversion section.

Preferably, the connecting node of the double-wall hollow pier column and the capping beam can be prefabricated and built, and can also be synchronously cast in situ with the double-wall hollow pier column and the capping beam as a connecting method. FIGS. 1 and 2 are schematic diagrams respectively illustrating connection nodes of double-wall hollow pier columns and capping beams prefabricated by adopting a connection mode I and a connection mode II; fig. 3 and 4 respectively show a joint schematic diagram for realizing cast-in-place connection of the double-wall hollow pier stud, the reinforced concrete capping beam and the steel reinforced concrete capping beam by adopting a connection mode I.

When the node is prefabricated, the arrangement range (L) of the steel bones in the conversion section of the bent cap₂) Is larger than the setting range (L) of the concrete layer at the conversion section of the capping beam₁) So that the cover beam is connected with the node through the steel rib in the overhanging cover beam conversion section. The bent cap conversion section longitudinal rib can extend out of the bent cap conversion section concrete layer, the extending length is not less than 60 times of the longitudinal rib diameter and 500mm, so that the connection between the bent cap concrete and the bent cap conversion section concrete layer is enhanced, and meanwhile, the bent cap longitudinal rib and the bent cap conversion section longitudinal rib are convenient to connect. And a gap of 50-100mm is reserved between the first conversion section composite pipe and the first conversion section concrete layer and the first steel clapboard, so that the first steel clapboard is connected with the steel pipe of the double-wall hollow pier stud during installation.

The invention also provides a prefabricated construction method of the connecting node of the double-wall hollow pier stud and the capping beam, which comprises the following steps:

when a prefabricated connecting joint (connecting mode II) of the first conversion section and the capping beam conversion section is built, a first steel partition plate is fixed at the bottom of a steel pipe in the first conversion section, and a composite pipe of the first conversion section is sleeved outside the steel pipe in the first conversion section, so that the composite pipe of the first conversion section can extend into a concrete protection layer of the capping beam conversion section; extending the top of the steel pipe in the first conversion section out of the composite pipe in the first conversion section, and extending the top of the steel pipe in the first conversion section to or out of the top of the steel rib in the capping beam conversion section; fixing steel ribs in the bent cap conversion section and steel pipes in a first conversion section extending into the bent cap conversion section, and pouring concrete between the composite pipe of the first conversion section and the steel pipes in the first conversion section, in the steel pipes in the first conversion section and in the bent cap conversion section to obtain prefabricated connecting nodes;

when a prefabricated connecting joint (connecting mode I) of the first conversion section, the second conversion section and the bent cap conversion section is built, a first steel partition plate is fixed at the bottom of a steel pipe in the first conversion section, a second steel partition plate is fixed at the top of the steel pipe in the first conversion section, and concrete is poured into the steel pipe in the first conversion section; fixing the bottom of the steel rib in the second conversion section on a second steel partition plate; the first conversion section composite pipe and the second conversion section composite pipe are integrally manufactured and are integrally sleeved outside the steel pipe in the first conversion section and the steel rib in the second conversion section, so that the second conversion section composite pipe extends into the position of the concrete protection layer of the cover beam conversion section; extending the top of the steel rib in the second conversion section out of the composite pipe of the second conversion section, and extending the top of the steel rib in the second conversion section to or out of the top of the steel rib in the conversion section of the cover beam; and fixing the steel bones in the bent cap conversion section and the steel bones in the second conversion section extending into the bent cap conversion section, and pouring concrete between the composite material pipe of the first conversion section and the steel pipe in the first conversion section, between the composite material pipe of the second conversion section and the steel bones in the second conversion section and in the bent cap conversion section to obtain the connecting node.

The invention also provides a cast-in-situ construction method of the connecting node of the double-wall hollow pier stud and the capping beam, which comprises the following steps:

when the double-wall hollow pier stud and the bent cap are fixedly connected through the first conversion section and the bent cap conversion section (connection mode II), the first steel partition plate is fixedly connected to the top of the steel pipe of the double-wall hollow pier stud; fixing the bottom of the steel pipe in the first conversion section on a first steel partition plate; the composite pipe of the double-wall hollow pier stud and the composite pipe of the first conversion section are manufactured integrally and are correspondingly sleeved on the outer sides of the double-wall hollow pier stud steel pipe and the inner steel pipe of the first conversion section; extending the top of the steel pipe in the first conversion section to or out of the top of the steel skeleton in the bent cap conversion section, and extending the composite pipe in the first conversion section to the position of the concrete protection layer in the bent cap conversion section; fixing steel ribs in the bent cap conversion section and a first conversion section inner steel pipe extending into the bent cap, and pouring concrete layers between a composite material pipe and a steel pipe of the double-wall hollow pier stud, between the first conversion section composite material pipe and the first conversion section inner steel pipe, in the bent cap conversion section and in the bent cap to complete cast-in-situ construction of a connecting node of the double-wall hollow pier stud and the bent cap;

when the double-wall hollow pier stud and the capping beam are fixedly connected through the first conversion section, the second conversion section and the capping beam conversion section (connection mode I), the first steel partition plate is fixedly connected to the top of the steel pipe of the double-wall hollow pier stud; fixing the bottom of the steel pipe in the first conversion section on a first steel partition plate; fixing a second steel clapboard on the top of the steel pipe in the first conversion section and pouring concrete into the steel pipe in the first conversion section; fixing the bottom of the steel rib in the second conversion section on a second steel partition plate; the composite pipe of the double-wall hollow pier stud, the composite pipe of the first conversion section and the composite pipe of the second conversion section are manufactured integrally and are correspondingly sleeved outside the steel pipe of the double-wall hollow pier stud, the steel pipe in the first conversion section and the steel rib in the second conversion section, so that the composite pipe of the second conversion section extends into the position of the concrete protection layer of the conversion section of the capping beam; extending the top of the steel rib in the second conversion section out of the composite pipe of the second conversion section, and extending the top of the steel rib in the second conversion section to or out of the top of the steel rib in the conversion section of the cover beam; fixing the steel ribs in the bent cap conversion section and the steel ribs in the second conversion section extending into the bent cap, and pouring concrete layers once between the composite material pipe and the steel pipe of the double-wall hollow pier stud, between the composite material pipe of the first conversion section and the steel pipe in the first conversion section, between the composite material pipe of the second conversion section and the steel ribs, in the bent cap conversion section and in the bent cap to complete the cast-in-situ construction of the connecting node of the double-wall hollow pier stud and the bent cap.

The invention has the following beneficial effects:

1. the application range is wide. The composite pipe-concrete-steel pipe double-wall hollow pier column and capping beam connecting node provided by the invention can be used for connecting various types of capping beams (such as steel capping beams, concrete-filled steel pipe capping beams and reinforced concrete capping beams) and can be used for connecting the composite pipe-concrete-steel pipe double-wall hollow pier column and the capping beam which are connected with each other in various cross-sectional shapes and sizes.

2. The connection is reliable. The composite pipe-concrete-steel pipe double-wall hollow pier column is converted into a composite pipe-concrete-steel pipe double-pipe solid concrete column (a first conversion section) or a composite pipe constraint steel reinforced concrete column conversion section (a second conversion section), and then can be connected with the steel skeleton in the bent cap conversion section in mature connection modes such as welding, riveting or bolting, and the reliability of node connection is ensured.

3. The stiffness changes smoothly. According to the invention, the connection between the composite pipe-concrete-steel pipe double-wall hollow pier column and the capping beam is realized through the first conversion section, the second conversion section and the capping beam conversion section, so that the rigidity of a node region is enhanced, and the rigidity mutation is avoided.

Compared with the existing PVC-FRP pipe constraint type steel concrete column-reinforced concrete beam cross node, the composite pipe-concrete-steel pipe double-wall hollow pier column and capping beam connecting node provided by the invention is mainly different from the following nodes: 1) the type of components connected is different. The components connected by the existing nodes are PVC-FRP pipe constraint type steel concrete columns and reinforced concrete beams, and the components connected by the nodes provided by the invention are composite pipe-concrete-steel pipe double-wall hollow pier columns and cover beams in various forms (such as steel cover beams, steel reinforced concrete cover beams, steel pipe concrete cover beams and reinforced concrete cover beams). The second conversion section is an optional structural connection section in the invention, and can be directly connected with the bent cap conversion section through a composite pipe-concrete-steel pipe double-pipe solid concrete column conversion section instead of the conversion section during application. 2) The construction of the node areas is different. Above-mentioned current node adopts the circular steel tube fastener to retrain the node region of connecting and strengthens, though improved the bearing capacity and the ductility in node district, nevertheless also makes node district occupation space bigger, and the process is more complicated. The joint connection area of the invention connects the steel rib (or steel pipe) of the conversion section and the steel rib in the conversion section of the bent cap by welding, riveting or bolting, the process is mature, the connection is reliable, and the construction is convenient.

Compared with the FRP hoop node of the existing thin-wall circular steel tube regenerated block concrete structure, the composite tube-concrete-steel tube double-wall hollow pier column and capping beam connecting node provided by the invention has the following advantages: firstly, the connection mode of the invention is more flexible, the invention can be directly connected with the bent cap conversion steel rib through a composite pipe-concrete-steel pipe double-tube solid concrete column conversion section (a first conversion section), and can also be simultaneously connected with the steel rib in the bent cap conversion section through the composite pipe-concrete-steel pipe double-tube solid concrete column conversion section (the first conversion section) and the composite pipe restraining steel rib concrete column conversion section (a second conversion section); secondly, the composite pipe-concrete-steel pipe double-pipe solid concrete column conversion section (first conversion section) has a stronger constraint effect and better bearing capacity and seismic performance; in addition, the connection mode provided by the invention can be used for connecting cover beams in various forms, and the application range is wide.

Compared with the existing beam-column joint structure with the composite pipe arranged outside, the beam-column joint structure with the composite material and concrete combined structure with the composite section arranged inside, the connecting joint of the composite material pipe-concrete column and the composite material pultrusion section beam and the novel rapid assembly type beam-column joint structure with the FRP section, the composite pipe-concrete-steel pipe double-wall hollow pier column and the capping beam connecting joint provided by the invention are different in that: firstly, in the joint provided by the invention, the steel ribs are arranged in the bent cap conversion section and the second conversion section, and the connection between the bent cap conversion section and the second conversion section is realized through the connection between the steel ribs; secondly, the node provided by the invention is mainly used for connecting a pier column and a capping beam in a bridge structure (T-shaped node), and the existing node is used for connecting a beam column node in a frame structure (cross-shaped node).

Compared with the existing double-steel-pipe concrete beam-column joint with the built-in FRP rib connecting device, the joint connecting object provided by the invention is a composite pipe-concrete-steel-pipe double-wall hollow pier column and a capping beam in various forms (such as a steel capping beam, a steel reinforced concrete capping beam and a reinforced concrete capping beam). In addition, in the prior art, the FRP ribs are arranged inside to improve the seismic energy consumption capacity of the node, which is different from the design idea of the invention.

Compared with the prior art that the composite pipe/steel pipe constraint reinforced concrete column is converted into the steel pipe concrete through the cover plate in the node area and then the connection section steel based on the outer side of the steel pipe concrete is connected with the composite pipe/steel pipe constraint reinforced concrete beam, the invention has the following advantages: 1) the vertical components connected in the prior art are composite pipe/steel pipe constraint steel reinforced concrete columns, while the vertical components connected in the invention are composite pipe-concrete-steel pipe double-wall hollow pier columns. 2) The steel pipe concrete cover beam can be directly connected with the steel ribs of the cover beam through the steel pipe concrete, and can also be connected with the steel ribs in the conversion section of the cover beam through the conversion of the steel rib concrete, so that the rigidity transition is more gradual. 3) The invention can be used for connecting the cover beam with I-shaped, T-shaped and U-shaped steel ribs and has stronger applicability.

Drawings

Fig. 1 is a schematic structural diagram of a connection node between a composite pipe-concrete-steel pipe combined pier stud and a capping beam (connection mode I).

Fig. 2 is a schematic structural diagram of a connection node between a composite pipe-concrete-steel pipe combined pier stud and a capping beam (connection mode II).

Fig. 3 is a schematic view of a joint for connecting a double-wall hollow pier stud and a reinforced concrete capping beam by adopting a connection mode I.

Fig. 4 is a schematic view of a joint for connecting a double-wall hollow pier stud and a steel reinforced concrete cover beam by adopting a connection mode I.

Fig. 5a-5d are schematic cross-sectional views of several possible cross-sections of section a-a.

Fig. 6a-6d are schematic cross-sectional views of several possible B-B sections.

Fig. 7a-7d are schematic cross-sectional views of several possible C-C sections.

Figures 8a-8D are schematic cross-sectional views of several possible D-D profiles.

Figures 9a-9c are schematic cross-sectional views of several possible sections of the E-E section.

Fig. 10a-10d are schematic cross-sectional views of several possible sections of the F-F section.

The steel structure comprises a composite pipe 1, a concrete 2, a steel pipe 3, a cavity 4, a first steel partition plate 5, anchor bolts 6, a second steel partition plate 7, concrete pouring holes 71, steel ribs in a second conversion section 8, steel ribs in a bent cap conversion section 9, longitudinal ribs 10, stirrups 11 and bent cap conversion section 12.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments thereof. The invention provides a connecting node of a double-wall hollow pier stud and a capping beam, wherein the double-wall hollow pier stud comprises a composite pipe positioned on the outer side, a steel pipe positioned in the composite pipe and a concrete layer positioned between the composite pipe and the steel pipe; the bent cap conversion section comprises a steel rib in the bent cap conversion section and a concrete layer of the bent cap conversion section; the first conversion section comprises a first conversion section composite pipe positioned on the outer side, a first conversion section inner steel pipe positioned in the first conversion section composite pipe and a first conversion section concrete layer positioned between the first conversion section composite pipe and the first conversion section inner steel pipe, the first conversion section inner steel pipe is internally provided with the steel pipe concrete layer and an anchor bolt, and the anchor bolt is used for enhancing the connection between the first conversion section and the second conversion section; under the action of earthquake, the first conversion section and the second conversion section may have a tendency of separation, and the anchor bolt can provide tensile bearing capacity to prevent the separation; the second conversion section comprises a second conversion section composite pipe positioned on the outer side, a second conversion section inner steel rib positioned in the second conversion section composite pipe and a second conversion section concrete layer positioned between the second conversion section composite pipe and the second conversion section inner steel rib; when the bent cap is fixedly connected with the bent cap conversion section through the first conversion section and the second conversion section, the bottom of a steel pipe in the first conversion section is fixedly connected with the top of the steel pipe of the double-wall hollow pier stud through a first steel partition plate, the top of the steel pipe is fixedly connected with the bottom of a steel rib in the second conversion section through a second steel partition plate, the top of the steel rib in the second conversion section extends into the bent cap conversion section and is fixedly connected with the steel rib in the bent cap conversion section, a composite pipe of the double-wall hollow pier stud, the composite pipe of the first conversion section and the composite pipe of the second conversion section are integrally manufactured and sleeved at corresponding positions to be fixed, and the bent cap is fixedly connected with the bent cap conversion section through the steel rib in the bent cap conversion section; when through first conversion section and bent cap conversion section fixed connection, the bottom of steel pipe in the first conversion section is through the steel pipe top fixed connection of first steel baffle and double-walled hollow pier stud, and the top stretches into in the bent cap conversion section with bent cap conversion section in steel bone fixed connection, and the compound material pipe of double-walled hollow pier stud and the integrative preparation of first conversion section compound material pipe are overlapped and are fixed to the relevant position, and the bent cap passes through in the bent cap conversion section steel bone and bent cap conversion section fixed connection.

The following is further illustrated by specific examples.

Example one

Referring to fig. 4, the present embodiment provides a cast-in-situ connection node of a double-wall hollow pier stud and a steel reinforced concrete coping, which includes a first transition section, a second transition section, and a coping transition section.

In this embodiment, the composite pipe-concrete-steel pipe double-wall hollow pier column is connected with the steel reinforced concrete cover beam sequentially through the composite pipe-concrete-steel pipe double-pipe solid concrete column conversion section (first conversion section), the composite pipe restraining steel reinforced concrete column conversion section (second conversion section), and the steel reinforced concrete cover beam conversion section (cover beam conversion section). And the steel pipe of the double-wall hollow pier stud is connected with the steel pipe in the first conversion section through the first steel partition plate, then is connected with the lower end of the steel skeleton in the second conversion section through the second steel partition plate, and finally, the upper end of the steel skeleton in the second conversion section extends into the bent cap conversion section and is connected with the steel skeleton in the bent cap conversion section. First steel baffle is for the inside concrete of bearing steel pipe, and second steel baffle is as a adapting unit when steel pipe conversion becomes the reinforcing bar (during steel pipe and reinforcing bar lug connection, do not have sufficient contact surface, can't form reliable connection), and two steel baffles all can provide certain anti shear capacity simultaneously.

In the embodiment, the cross-sectional profile shapes of the composite pipe, the concrete-steel pipe double-wall hollow pier stud, the first conversion section and the second conversion section are all circular; the composite pipe-concrete-steel pipe double-wall hollow pier stud and the steel pipe of the first conversion section are single-cavity steel pipes, and the cross-sectional outline of the single-cavity steel pipes is square; the section outline shape of the steel bone in the second conversion section is I-shaped.

In this embodiment, the shape of the cross-sectional profile of the steel skeleton in the bent cap conversion section is an I-shaped, and the steel bars are arranged outside the steel skeleton in the bent cap conversion section and comprise longitudinal bars and stirrups.

In the embodiment, the outline of the section of the steel rib of the cover beam is I-shaped; the bent cap steel rib is connected with the steel rib in the bent cap conversion section through a high-strength bolt.

In the embodiment, the size and the thickness of the outer profile of the cross section of the first steel partition plate are the same as those of the outer profiles of the steel pipe in the double-wall hollow pier column and the steel pipe in the first conversion section; the size and the thickness of the outer contour of the second steel partition plate are the same as those of the outer contour of the steel pipe in the first conversion section; the thickness of the steel ribs in the second conversion section is the same as that of the steel pipes in the first conversion section, and the outer contour dimension of the steel ribs in the second conversion section is smaller than that of the steel pipes in the first conversion section.

In the embodiment, the first steel partition plate is connected with the double-wall hollow pier column steel pipe and the first conversion section inner steel pipe through welding; the second steel partition plate is connected with the steel pipe in the first conversion section and the steel skeleton in the second conversion section through welding and anchored in the concrete in the steel pipe in the first conversion section through anchor bolts; the steel ribs in the second conversion section are connected with the steel ribs in the bent cap conversion section through high-strength bolts.

In this embodiment, the second steel partition plate is provided with a circular concrete pouring hole having a diameter of 100 mm.

In this embodiment, the heights of the first conversion section and the second conversion section are both 1000 mm.

The present embodiment is constructed by cast-in-place according to the following method:

the method comprises the steps of firstly, connecting a first steel partition plate to the top of a composite pipe-concrete-steel pipe double-wall hollow pier stud, then connecting the bottom of a steel pipe in a first conversion section with the first steel partition plate in any one of welding, riveting and bolting, connecting a second steel partition plate connected with an anchor bolt to the top of the steel pipe in the first conversion section in any one of welding, riveting and bolting, and enabling the anchor bolt to extend into the interior of the steel pipe in the first conversion section.

And secondly, forming concrete pouring holes which are round holes or square holes in the second steel partition plate, pouring concrete in the steel tube in the first conversion section through the round holes or the square holes in the second steel partition plate, and connecting the steel ribs in the second conversion section with the second steel partition plate in any one mode of welding, riveting and bolting after the concrete is preliminarily solidified.

Thirdly, integrally manufacturing the composite pipe-concrete-steel pipe hollow pier stud, the first conversion section and an external composite pipe of the second conversion section, integrally sleeving the composite pipe and the steel rib outside and temporarily fixing the composite pipe and the concrete-steel pipe hollow pier stud, wherein the steel rib in the second conversion section extends out of the composite pipe to reach the top of the steel rib in the bent cap conversion section, the composite pipe in the second conversion section extends into the range of a concrete protective layer at the bottom of the bent cap conversion section by 10mm, and then pouring the composite pipe and the steel pipe or the steel rib interlayer to fill concrete; and when concrete is poured, a post-cast strip of 300mm is left at the top of the second conversion section. The post-cast strip is reserved to avoid the appearance of a joint of front and rear cast concrete at the junction of the second conversion section and the cover beam; the joints of the front and rear concretes are moved downwards by arranging the post-cast strip, so that the integrity of the junction of the second conversion section and the capping beam is enhanced; when the capping beam, the second conversion section and the double-wall hollow pier stud are synchronously cast with concrete, a post-cast strip is not required.

And fourthly, connecting the steel rib in the bent cap conversion section with the steel rib in the second conversion section in any one mode of welding, riveting and bolting, connecting the steel rib of the steel rib concrete bent cap with the steel rib in the bent cap conversion section in any one mode of welding, riveting and bolting, binding reinforcing steel bars and a formwork, and then pouring concrete in the bent cap, the bent cap conversion section and the post-pouring zone at the top of the second conversion section.

Example two

Referring to fig. 3, the present embodiment provides a cast-in-place connection node of a double-wall hollow pier stud and a reinforced concrete capping beam, and the node includes a first conversion section, a second conversion section and a capping beam conversion section.

In this embodiment, the composite pipe-concrete-steel pipe double-wall hollow pier column is connected with the reinforced concrete bent cap sequentially through the composite pipe-concrete-steel pipe double-pipe solid concrete column conversion section (first conversion section), the composite pipe restraining reinforced concrete column conversion section (second conversion section), and the reinforced concrete bent cap conversion section (bent cap conversion section). And the steel pipe in the double-wall hollow pier stud is connected with the steel pipe in the first conversion section through the first steel partition plate, then is connected with the lower end of the steel skeleton in the second conversion section through the second steel partition plate, and finally, the upper end of the steel skeleton in the second conversion section extends into the bent cap conversion section and is connected with the steel skeleton in the bent cap conversion section.

In the embodiment, the cross-sectional profile shapes of the composite pipe, the concrete-steel pipe double-wall hollow pier stud, the first conversion section and the second conversion section are all square; the composite pipe-concrete-steel pipe double-wall hollow pier stud and the steel pipe of the first conversion section are single-cavity steel pipes, and the cross-sectional outline of the single-cavity steel pipes is square; the section outline shape of the steel bone in the second conversion section is I-shaped.

In this embodiment, the shape of the cross-sectional profile of the steel skeleton in the bent cap conversion section is an I-shaped, and the steel bars are arranged outside the steel skeleton in the bent cap conversion section and comprise longitudinal bars and stirrups.

The present embodiment is constructed by cast-in-place according to the following method:

the method comprises the steps of firstly, connecting a first steel partition plate to the top of a composite pipe-concrete-steel pipe double-wall hollow pier stud, then connecting the bottom of a steel pipe in a first conversion section with the first steel partition plate in any one of welding, riveting and bolting, connecting a second steel partition plate connected with an anchor bolt to the top of the steel pipe in the first conversion section in any one of welding, riveting and bolting, and enabling the anchor bolt to extend into the interior of the steel pipe in the first conversion section.

And secondly, forming concrete pouring holes which are round holes or square holes in the second steel partition plate, pouring concrete in the steel tube in the first conversion section through the round holes or the square holes in the second steel partition plate, and connecting the steel ribs in the second conversion section with the second steel partition plate in any one mode of welding, riveting and bolting after the concrete is preliminarily solidified.

And thirdly, integrally manufacturing the composite pipe, the concrete-steel pipe hollow pier stud, the first conversion section and an external composite pipe of the second conversion section, integrally sleeving the composite pipe and the steel rib, and temporarily fixing the composite pipe and the steel rib, wherein the steel rib in the second conversion section extends out of the composite pipe to reach the top of the steel rib in the bent cap conversion section, and the composite pipe in the second conversion section extends into a concrete protective layer at the bottom of the bent cap conversion section within 10 mm.

And fourthly, connecting the steel ribs in the bent cap conversion section with the steel ribs in the second conversion section in any one mode of welding, riveting and bolting, binding the steel bars and the supporting templates in the bent cap conversion section and the reinforced concrete bent cap, and then pouring the interlayer concrete of the double-wall hollow pier stud, the first conversion section, the second conversion section and the bent cap conversion section and the concrete in the reinforced concrete bent cap at one time.

The embodiment is not described in the first embodiment.

EXAMPLE III

The embodiment provides a double-wall hollow pier stud and steel reinforced concrete cover beam cast-in-situ connecting node, which comprises a first conversion section and a cover beam conversion section.

In this embodiment, the composite pipe-concrete-steel pipe double-wall hollow pier column is connected to the steel reinforced concrete coping through a composite pipe-concrete-steel pipe double-pipe solid concrete column conversion section (a first conversion section) and a steel reinforced concrete coping conversion section (a coping conversion section). And the steel pipe in the double-wall hollow pier stud is connected with the steel pipe in the first conversion section through a first steel partition plate, and then the upper end of the steel pipe in the first conversion section extends into the bent cap conversion section and is connected with the steel skeleton in the bent cap conversion section.

In the embodiment, the cross-sectional profiles of the composite pipe, the concrete and the steel pipe double-wall hollow pier stud and the composite pipe of the first conversion section are both square; the composite pipe-concrete-steel pipe double-wall hollow pier column and the steel pipe of the first conversion section are single-cavity steel pipes, and the cross section outline shapes of the single-cavity steel pipes are circular.

In this embodiment, the shape of the cross-sectional profile of the steel skeleton in the bent cap conversion section is an I-shaped, and the steel bars are arranged outside the steel skeleton in the bent cap conversion section and comprise longitudinal bars and stirrups.

The present embodiment is constructed by cast-in-place according to the following method:

firstly, connecting a first steel clapboard to the top of the composite pipe-concrete-steel pipe double-wall hollow pier stud in any one of welding, riveting and bolting, and then connecting the bottom of the steel pipe in the first conversion section with the first steel clapboard in any one of welding, riveting and bolting;

secondly, integrally manufacturing the composite pipe, the concrete-steel pipe hollow pier stud and the composite pipe of the first conversion section, integrally sleeving the composite pipe, the concrete-steel pipe hollow pier stud and the composite pipe of the first conversion section on the outer side of a corresponding steel pipe and temporarily fixing the composite pipe, wherein the composite pipe of the first conversion section extends into the range of a concrete protective layer at the bottom of the bent cap conversion section by 15mm, and then pouring concrete in the steel pipe of the first conversion section, and concrete in the composite pipe, the concrete-steel pipe hollow pier stud and the composite pipe and the steel pipe interlayer in the range of the first conversion section; when concrete is poured, a 200mm post-cast strip is left at the top of the first conversion section.

And thirdly, connecting the steel skeleton in the bent cap conversion section with the steel pipe in the first conversion section in any one of welding, riveting and bolting, connecting the steel skeleton of the steel reinforced concrete bent cap with the steel skeleton in the bent cap conversion section in any one of welding, riveting and bolting, binding steel bars and supporting templates, and pouring concrete in the bent cap, in the bent cap conversion section and at the top of the first conversion section.

The embodiment is not described in the first embodiment.

Example four

The embodiment provides a prefabricated construction method of a connecting node of a double-wall hollow pier column and a capping beam. The node comprises a first conversion section and a bent cap conversion section, and the prefabrication and construction method comprises the following steps:

when a connecting node of the first conversion section and the capping beam conversion section is built, a first steel partition plate is fixed at the bottom of a steel pipe in the first conversion section, and a composite pipe of the first conversion section is sleeved outside the steel pipe in the first conversion section, so that the composite pipe of the first conversion section can extend into a concrete protection layer of the capping beam conversion section; extending the top of the steel pipe in the first conversion section out of the composite pipe in the first conversion section, and extending the top of the steel pipe in the first conversion section to or out of the top of the steel rib in the capping beam conversion section; fixing the steel ribs in the bent cap conversion section and the steel pipes in the first conversion section extending into the bent cap conversion section, and then pouring concrete between the composite pipes in the first conversion section and the steel pipes in the first conversion section and in the bent cap conversion section to obtain the prefabricated connecting node.

EXAMPLE five

The embodiment provides a prefabricated construction method of a connecting node of a double-wall hollow pier column and a capping beam. The node comprises a first conversion section, a second conversion section and a capping beam conversion section, and the prefabrication construction method comprises the following steps: when a connecting node of the first conversion section, the second conversion section and the bent cap conversion section is built, fixing a first steel clapboard at the bottom of the steel pipe in the first conversion section, fixing a second steel clapboard at the top of the steel pipe in the first conversion section and pouring concrete into the steel pipe in the first conversion section; fixing the bottom of the steel rib in the second conversion section on a second steel partition plate; the first conversion section composite pipe and the second conversion section composite pipe are integrally manufactured and are integrally sleeved outside the steel pipe in the first conversion section and the steel rib in the second conversion section, so that the second conversion section composite pipe extends into the position of the concrete protection layer of the cover beam conversion section; extending the top of the steel rib in the second conversion section out of the composite pipe of the second conversion section, and extending the top of the steel rib in the second conversion section to or out of the top of the steel rib in the conversion section of the cover beam; and fixing the steel bones in the bent cap conversion section and the steel bones in the second conversion section extending into the bent cap conversion section, and pouring concrete between the composite material pipe of the first conversion section and the steel pipe in the first conversion section, between the composite material pipe of the second conversion section and the steel bones in the second conversion section and in the bent cap conversion section to obtain the prefabricated connecting node.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, but the present invention is not limited to the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be regarded as equivalent replacements and equivalents, and all are included in the protection scope of the present invention.