阅读说明：本技术 用于钢结构与外挂墙板的环形钢-钢支托连接节点构造 (Annular steel-steel support connecting node structure for steel structure and externally-hung wallboard ) 是由 黄柯玮 李静 肖成凯 谢沛醒 张峰桦 于 2020-12-24 设计创作，主要内容包括：本发明公开了一种用于钢结构与外挂墙板的环形钢-钢支托连接节点构造,包括下层外挂墙板和上层外挂墙板,所述下层外挂墙板通过框架梁与上层外挂墙板连接,所述框架梁上设置有上节点连接装置和下节点连接装置；所述上节点连接装置包括上节点环形钢板、连接钢板及预埋件；所述上节点环形钢板上设置至少一片以上的耗能钢片；所述连接钢板位于所述上节点环形钢板内表面,并与框架梁下翼缘接触；所述预埋件位于下层外挂墙板内,并与上节点环形钢板连接；所述预埋件包括螺栓套筒、锚固钢筋及预埋件钢板,所述下节点连接装置包括钢支托,所述钢支托与框架梁连接部位设有第一长孔,所述钢支托通过第一螺栓与框架梁紧固连接。(The invention discloses an annular steel-steel support connecting node structure for a steel structure and an externally-hung wallboard, which comprises a lower externally-hung wallboard and an upper externally-hung wallboard, wherein the lower externally-hung wallboard is connected with the upper externally-hung wallboard through a frame beam, and the frame beam is provided with an upper node connecting device and a lower node connecting device; the upper node connecting device comprises an upper node annular steel plate, a connecting steel plate and an embedded part; at least more than one energy consumption steel sheet is arranged on the upper node annular steel plate; the connecting steel plate is positioned on the inner surface of the upper node annular steel plate and is in contact with the lower flange of the frame beam; the embedded part is positioned in the lower-layer external wallboard and is connected with the upper node annular steel plate; the embedded part comprises a bolt sleeve, an anchoring steel bar and an embedded part steel plate, the lower node connecting device comprises a steel support, a first long hole is formed in the connecting part of the steel support and the frame beam, and the steel support is fixedly connected with the frame beam through a first bolt.)

1. A annular steel-steel bracket connected node structure for steel construction and externally-hung wallboard, including lower floor's externally-hung wallboard (4) and upper strata externally-hung wallboard (5), lower floor's externally-hung wallboard (4) are connected its characterized in that through frame roof beam (3) and upper strata externally-hung wallboard (5): the frame beam (3) is provided with an upper node connecting device and a lower node connecting device;

the upper node connecting device comprises an upper node annular steel plate (2), a connecting steel plate (13) and an embedded part; at least more than one energy consumption steel sheet (14) is arranged on the upper node annular steel plate (2); the connecting steel plate (13) is positioned on the inner surface of the upper node annular steel plate (2) and is in contact with the lower flange of the frame beam (3); the connecting steel plate (13) and the energy-consuming steel plate (14) are bolted with the frame beam (3); the embedded part is positioned in the lower-layer external wallboard (4) and is connected with the upper node annular steel plate (2);

the embedded part comprises a bolt sleeve (20), an anchoring steel bar (21) and an embedded part steel plate (22), the embedded part steel plate (22) is connected with the distributed steel bars of the concrete layer of the lower external wallboard (4), and the anchoring steel bar (21) is connected with the embedded part steel plate (22); the upper node annular steel plate (2) is connected with a bolt sleeve (20) through a bolt;

the lower node connecting device comprises a steel support bracket (1), a first long hole (7) is formed in the connecting part of the steel support bracket (1) and the frame beam (3), and the steel support bracket (1) is fixedly connected with the frame beam (3) through a first bolt (8); a second long hole (6) is formed in the connecting part of the steel bracket (1) and the upper outer wall panel (5), the steel bracket (1) is fixedly connected with the upper outer wall panel (5) through a second bolt (9), and a first disc-shaped spring (12) is sleeved on the second bolt (9); the steel bracket (1) is provided with a first steel rib plate (10) and a second steel rib plate (11).

2. The ring-shaped steel-steel bracket connection node construction for steel structures and externally hung wall panels according to claim 1, wherein: the upper node annular steel plate (2) comprises two straight steel plates which are oppositely arranged, and the end parts of the two straight steel plates are connected through two arc-shaped plates; the two sections of straight steel plates are respectively provided with at least more than one energy-consuming steel sheet (14).

3. The ring-shaped steel-steel bracket connection node construction for steel structures and externally hung wall panels according to claim 2, wherein: a straight steel plate on one side of the upper node annular steel plate (2) is provided with a fourth long hole (17), the upper node annular steel plate (2) is connected with the embedded part through a fourth bolt (18), and a second disc spring (19) is sleeved on the fourth bolt (18).

4. The ring-shaped steel-steel bracket connection node construction for steel structures and externally hung wall panels according to claim 3, wherein: and the connecting steel plate (13), the energy consumption steel sheet (14) and the frame beam (3) are connected through third long holes (15), and the connecting steel plate (13) and the energy consumption steel sheet (14) are bolted with the frame beam (3) through third bolts (16).

5. The ring-shaped steel-steel bracket connection node construction for steel structures and externally hung wall panels according to claim 4, wherein: the hole diameters of the second long hole (6), the first long hole (7), the third long hole (15) and the fourth long hole (17) are 1-2mm larger than the diameter of the bolt rod, and the length of the long edge of each long hole is 3-5 times of the hole diameter.

6. The ring-shaped steel-steel bracket connection node construction for steel structures and externally hung wall panels according to claim 5, wherein: the diameter of the bending section of the upper node annular steel plate (2) is 80-140mm according to the size of the steel beam, and the thickness is 10-16 mm.

7. The ring-shaped steel-steel bracket connection node construction for steel structures and externally hung wall panels according to claim 6, wherein: and a gap between the top of the external wallboard and the frame beam (3) is filled with a heat insulation material.

8. The ring-shaped steel-steel bracket connection node construction for steel structures and externally hung wall panels according to claim 7, wherein: the material of the energy-consuming steel sheet (14) is low yield steel LYP100, the thickness of a single energy-consuming steel sheet (14) is 12-16mm, and the number of the energy-consuming steel sheets is determined according to the requirements of space conditions, loads and deformation.

9. The ring-shaped steel-steel bracket connection node construction for steel structures and externally hung wall panels according to claim 8, wherein: each bolt was rated 8.8 or 10.9.

10. The annular steel-steel bracket connecting joint structure for the steel structure and the externally hung wallboard according to any one of claims 1 to 9, wherein: the anchoring steel bars (21) are 4 HPB300 steel bars with the diameter of 10 mm.

Technical Field

The invention belongs to the field of steel structure buildings, and particularly relates to an annular steel-steel support connecting node structure for a steel structure and an externally-hung wallboard, which is particularly suitable for areas with high earthquake occurrence frequency and high fortification intensity.

Background

The assembled steel structure building in China is in the rapid development stage, a series of relevant policies are brought out by the country to popularize the assembled steel structure, and the popularization of the assembled steel structure becomes a trend. In the assembled steel structure building, the enclosing wall plate is an important component, and the outer wall plate is used as one of the enclosing wall plates, so that the development is particularly rapid. In order to ensure the safety of the external wall-hanging panel, the connection mode of the external wall-hanging panel and the steel structure main body is particularly important for the seismic performance of the wall panel and even the whole structure, and how to improve the seismic performance of the connection node to reduce the damage of an earthquake to the structure is a subject worthy of research.

Nowadays, energy dissipation and shock absorption are widely accepted shock absorption concepts, energy input into a structure is introduced into a specific component through control, so that the safety of a main body structure is guaranteed, and a fuse is added for the safety of the structure. The steel damper is one of the large category of energy dissipation and shock absorption devices, wherein a U-shaped steel plate is a typical out-of-plane bending energy dissipation damper, and the consumption of seismic energy is mainly realized through the shear deformation of a bent section of the steel plate; the low yield steel damper is favorable for improving the hysteretic energy consumption capability of steel due to excellent material characteristics such as high yield ratio, good extensibility and the like, and has wide application prospect in energy consumption and shock absorption equipment such as metal dampers and the like. However, in the currently existing embodiments, U-shaped steel plates are mainly used for the connection between wall panels, and are rarely used for the connection between wall panels and steel frames (hou and tao, qiao, xie shun. U-shaped steel-friction energy dissipation node and exterior wall system for fabricated exterior wall panels [ P ]. shandong province: CN111519786A, 2020-08-11.); the research of the low yield steel damper mainly focuses on the component level, and is not applied to practical engineering in a large amount.

Disclosure of Invention

Aiming at the condition that the energy dissipation damper is not popularized to the connection between a steel structure and an external wall panel, the invention provides the annular connecting node with the built-in energy dissipation steel sheets by combining the advantages of two dampers. Compared with a U-shaped node, the node is additionally provided with one arc-shaped section, the seismic energy can be consumed through the deformation of the two arc-shaped sections, and the energy consumption capability is more excellent than that of the U-shaped node; meanwhile, a low-yield steel damper principle is applied, a low-yield energy-consumption steel sheet is welded with an annular steel plate, and the seismic energy is further dissipated through shearing of the steel sheet; the friction sliding of the high-strength bolt in the annular steel plate oblong hole can also achieve the purpose of energy consumption. Therefore, when the earthquake load is small, the connecting node does not slide under the action of the high-strength bolt pre-tightening force, the annular steel plate and the energy-consuming steel sheet do not deform, the wallboard and the steel frame move together, and the lateral stiffness of the wallboard is fully utilized; when the earthquake load is larger, the connecting node slides, the annular steel plate and the energy consumption steel sheet start to generate plastic deformation, the earthquake energy is consumed, and the external wall panel is protected.

The invention is realized by at least one of the following technical schemes.

The annular steel-steel support connecting node structure for the steel structure and the external wall-hanging plate comprises a lower layer external wall-hanging plate and an upper layer external wall-hanging plate, wherein the lower layer external wall-hanging plate is connected with the upper layer external wall-hanging plate through a frame beam, and the frame beam is provided with an upper node connecting device and a lower node connecting device;

the upper node connecting device comprises an upper node annular steel plate, a connecting steel plate and an embedded part; at least more than one energy consumption steel sheet is arranged on the upper node annular steel plate; the connecting steel plate is positioned on the inner surface of the upper node annular steel plate and is in contact with the lower flange of the frame beam; the connecting steel plate and the energy-consuming steel plate are bolted with the frame beam; the embedded part is positioned in the lower-layer external wallboard and is connected with the upper node annular steel plate;

the embedded part comprises a bolt sleeve, an anchoring steel bar and an embedded part steel plate, the embedded part steel plate is connected with the distributed steel bar of the concrete layer of the lower external wallboard, and the anchoring steel bar is connected with the embedded part steel plate; the upper node annular steel plate is connected with the bolt sleeve through a bolt;

the lower node connecting device comprises a steel support, a first long hole is formed in the connecting part of the steel support and the frame beam, and the steel support is fixedly connected with the frame beam through a first bolt; the connecting part of the steel bracket and the upper outer hanging wallboard is provided with a second long hole, the steel bracket is fixedly connected with the upper outer hanging wallboard through a second bolt, and a first disc-shaped spring is sleeved on the second bolt; the steel bracket is provided with a first steel rib plate and a second steel rib plate.

Preferably, the upper node annular steel plate comprises two straight steel plates which are oppositely arranged, and the end parts of the two straight steel plates are connected through two arc-shaped plates; the two sections of straight steel plates are respectively provided with at least more than one energy consumption steel sheet.

Preferably, a straight steel plate on one side of the upper node annular steel plate is provided with a fourth long hole, the upper node annular steel plate is connected with the embedded part through a fourth bolt, and a second disc spring is sleeved on the fourth bolt.

Preferably, the connecting steel plate, the energy-consuming steel sheet and the frame beam are connected through third long holes, and the connecting steel plate and the energy-consuming steel sheet are bolted to the frame beam through third bolts.

Preferably, the hole diameters of the second long hole, the first long hole, the third long hole and the fourth long hole are 1-2mm larger than the diameter of the bolt rod, and the length of the long edge of each long hole is 3-5 times of the hole diameter.

Preferably, the diameter of the bending section of the upper node annular steel plate is 80-140mm according to the size of the steel beam, and the thickness of the bending section of the upper node annular steel plate is 10-16 mm.

Preferably, the gap between the top of the external wallboard and the frame beam is filled with a heat insulation material.

Preferably, the material of the energy-consuming steel sheets is low-yield steel LYP100, the thickness of each energy-consuming steel sheet is 12-16mm, and the number of the energy-consuming steel sheets is determined according to the requirements of space conditions, loads and deformation.

Preferably, each bolt is rated 8.8 or 10.9.

Preferably, the anchoring steel bars are 4 HPB300 steel bars with the diameter of 10 mm.

Compared with the prior art, the invention has the beneficial effects that:

the energy-consuming connecting node provided by the invention has the advantages that the deformation among structural layers is small under a small earthquake, the rigid node, the frame beam, the node and the wallboard are unified into a whole under the action of the pretightening force of the bolt, and the node is in an elastic working state and can provide certain additional rigidity for the structure; when earthquake load increases, reach the design limit value, the relative frame roof beam of wall body takes place to slide through the slotted hole along the direction of frame roof beam, consumes energy through the friction, and the node takes place to surrender earlier than major structure simultaneously: the bending section of the annular steel plate is deformed, the built-in energy-consumption steel plate is subjected to shear deformation, the three energy-consumption modes act together to protect the wallboard, and the brittle failure of the wallboard is avoided.

The invention improves the lower support and upper pull node of the externally hung wallboard and the U-shaped steel damper, when the earthquake load is smaller, the external hung wallboard and the frame beam can be stressed together through the pretightening force of the high-strength bolts at the upper node and the lower node, and the strength and the rigidity of the wallboard are fully utilized; when the earthquake load is larger, the high-strength bolts at the upper and lower nodes can slide in the oblong holes in a friction mode, so that the shearing of the bolt rods and the stress of the wall plate are delayed, meanwhile, the consumption of earthquake energy can be further realized by utilizing the plastic bending deformation of the bending section of the annular steel plate at the upper node and the shearing deformation of the built-in energy-consuming steel sheet, and the damage of the earthquake action to the wall plate is reduced.

The energy-consuming connection joint provided by the invention adopts a bolt connection and welding mode, avoids wet operations such as field grouting and the like, saves the labor cost and accelerates the construction progress.

According to the energy-consumption connecting node, all used connecting pieces can be detached and recycled, and the maintenance cost is saved.

Drawings

FIG. 1 is a perspective view of the overall structure of an embodiment of the present invention;

FIG. 2 is a perspective detailed view of an upper node according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating deformation of the upper node annular steel plate and the energy-consuming steel plate during operation according to the embodiment of the present invention;

FIG. 4 is a schematic plan view of the overall structure of an embodiment of the present invention;

in the figure: 1-a steel support; 2-upper node annular steel plate; 3-an i-beam; 4-lower layer external wall board; 5-hanging the wallboard outside the upper layer; 6-second long hole; 7-a first slot; 8-a first high-strength bolt, 9-a second high-strength bolt; 10-a first steel rib plate; 11-a second steel rib plate; 12-a first disc spring; 13-connecting the steel plates; 14-energy-consuming steel sheets; 15-third slot; 17-a fourth slot; 16-a third high-strength bolt; 18-a fourth high-strength bolt; 19-a second disc spring; 20-bolt sleeves; 21-anchoring a steel bar; 22-embedment steel plates.

Detailed Description

The following describes the object of the present invention in further detail with reference to the drawings and specific examples, which are not repeated herein, but the embodiments of the present invention are not limited to the following examples. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

As shown in fig. 1 and 4, the annular steel-steel bracket connection node structure for a steel structure and an external wall panel comprises a lower external wall panel 4 and an upper external wall panel 5, wherein the lower external wall panel 4 is connected with the upper external wall panel 5 through a frame beam 3, and the frame beam 3 is provided with an upper node connection device and a lower node connection device;

the upper node connecting device comprises an upper node annular steel plate 2, a connecting steel plate 13 and an embedded part; at least more than one energy consumption steel sheet 14 is arranged on the upper node annular steel plate 2; the connecting steel plate 13 is welded on the inner surface of the upper node annular steel plate 2 and is in contact with the lower flange of the frame beam. The connecting steel plate 13 and the energy-consuming steel plate 14 are bolted with the frame beam;

the upper node connecting device comprises an upper node annular steel plate 2, a connecting steel plate 13 and an embedded part; the upper node annular steel plate 2 comprises two straight steel plates which are oppositely arranged, and the end parts of the two straight steel plates are connected through two arc-shaped plates; at least more than one energy consumption steel sheet 14 is respectively arranged on the two sections of straight steel plates; the connecting steel plate 13 is welded on the inner surface of the upper node annular steel plate 2 and is in contact with the lower flange of the frame beam, and the connecting steel plate is bolted with the frame beam; in this embodiment, the frame beam is an i-beam 3.

As shown in fig. 2 and 3, third oblong holes 15 with long sides parallel to the wall surface are formed in the connecting portions of the connecting steel plates 13, the energy-consuming steel plates 14 and the i-shaped steel beams 3, and the connecting steel plates 13 and the energy-consuming steel plates 14 are bolted to the i-shaped steel beams through third high-strength bolts 16; the straight steel plate on the side surface of the upper node annular steel plate 2 is provided with a fourth long hole 17 with the long edge parallel to the wall surface, the upper node annular steel plate 2 is connected with an embedded part in the lower-layer external wall panel 4 through a fourth high-strength bolt 18, and a second disc spring 19 is sleeved on the high-strength bolt 18.

The embedded parts in the lower-layer externally-hung wallboard 4 comprise bolt sleeves 20, anchoring steel bars 21 and embedded part steel plates 22, the embedded part steel plates 22 are welded with the distributed steel bars of the composite wallboard concrete layer, and the anchoring steel bars 21 are welded with the embedded part steel plates 22. The bolt sleeve 20 is connected to the fourth high-strength bolt 18. The anchoring reinforcing steel bars 21 are 4 HPB300 reinforcing steel bars with the diameter of 10 mm.

The lower node connecting device comprises a steel bracket 1, a first long hole 7 with the long edge parallel to the wall surface is formed in the connecting part of the steel bracket 1 and a frame beam, the steel bracket 1 and the frame beam are fixedly connected through a first high-strength bolt 8, and the frame beam is an I-shaped steel beam 3; a second long circular hole 6 with the long edge vertical to the wall surface is formed in the connecting part of the steel bracket 1 and the upper external wall panel 5, the steel bracket 1 and the external wall panel 5 are fixedly connected through a second high-strength bolt 9, and a first disc-shaped spring 12 is sleeved on the second high-strength bolt 9; a first steel rib plate 10 is welded at the position, close to the frame beam 3, of the steel bracket 1, and a second steel rib plate 11 is welded at the position, close to the wallboard, of the steel bracket.

The second long hole 6, the first long hole 7, the third long hole 15 and the fourth long hole 17 are all long round holes, the diameter of each long hole is 1-2mm larger than the diameter of the bolt rod, and the length of each long edge of each long hole is 3-5 times of the diameter of each long hole. Each bolt was rated 8.8 or 10.9.

The material of the energy-consuming steel sheets 14 is low yield steel LYP100, the thickness of the single energy-consuming steel sheets 14 is 12-16mm, and the number of the energy-consuming steel sheets is determined according to the requirements of space conditions, loads and deformation.

The diameter of the bending section of the upper node annular steel plate 2 is 80-140mm according to the size of the steel beam, and the thickness is 10-16 mm.

Under the action of a horizontal earthquake parallel to the wall surface, the frame beam firstly bears earthquake load. When the earthquake load is small, the connecting steel plate 13 and the I-shaped steel beam 3 displace together under the action of the high-strength bolt pre-tightening force, and the external wall panel 4 and the upper node annular steel plate 2 displace together under the action of the high-strength bolt pre-tightening force, so that the I-shaped steel beam 3, the connecting steel plate and the external wall panel 4 do not move relatively, two flat straight sections of the upper node annular steel plate 2 do not displace relatively, and the energy-consuming steel plate 14 does not shear; when the earthquake load is gradually increased to exceed the slipping load between the connecting node and the I-shaped steel beam, the connecting steel plate and the I-shaped steel beam 3 slip, so that the wall plate 4 slips relative to the main structure through the oblong hole, the two straight sections of the upper node annular steel plate 2 start to generate relative displacement, and the bent section of the upper node annular steel plate 2 and the built-in energy-consumption steel sheet 14 start to deform under stress, so that energy is consumed; when the earthquake load continues to increase, the high-strength bolt slides to the edge of the long round hole to be contacted with the hole wall, the plastic deformation of the upper node annular steel plate 2 and the built-in energy-consumption steel plate 14 is further increased, and the node energy consumption is gradually increased. Therefore, the effect that the node does not work under a small earthquake and the node dissipates earthquake energy through plastic deformation under a large earthquake is achieved, and the purposes of fully utilizing the rigidity of the wallboard under the small earthquake and avoiding the damage of the wallboard under the large earthquake are achieved.

Under the action of a horizontal earthquake vertical to the wall surface, the long edge of the steel bracket 1 is vertical to the long round hole of the wall surface, so that the wallboard can slide out of the plane relative to the frame beam, and the sliding friction consumes earthquake energy.

Under the action of a vertical earthquake, the disc spring at the steel bracket 1 can deform, so that the energy of a vertical earthquake load is consumed, and the purpose of protecting the wallboard is achieved.

The construction method of the above example mainly comprises the following steps:

1. when the high-strength bolt is installed, the upper node annular steel plate 2 and the connecting steel plate 13 are welded to each other and are placed at the position of the lower flange of the I-shaped steel beam 3, the connecting steel plate 2 with the reserved long circular hole, the energy-consuming steel plate 3 and the hole of the lower flange of the I-shaped steel beam 3 are aligned, and the high-strength bolt is installed and tightened.

2. Welding the steel bracket 1 on the upper flange of the I-shaped steel beam 3; the upper outer wall-hung plate 5 is hoisted to the installation position, and after the position of the wall-hung plate is further adjusted by using a laser line marker, the steel bracket 1 and the embedded internal thread sleeve of the upper outer wall-hung plate 5 are screwed up by high-strength bolts.

3. And finally, connecting the upper node annular steel plate 2 with the embedded bolt sleeve 20 of the lower-layer external wall panel 4 by using a high-strength bolt.

4. After the nodes and the wall boards are installed, gaps between the externally hung wall boards and the I-shaped steel beams 3 are filled with heat insulation materials.

In conclusion, compared with other energy consumption connection nodes, the fabricated steel structure with the built-in energy consumption steel sheet and the annular connection node structure of the prefabricated external wall panel have the following advantages: 1. under the condition of small vibration, the frame and the wallboard move together through the pretightening force provided by the high-strength bolt, the rigidity of the wallboard is fully exerted, and the node is in the elastic working stage; 2. relative displacement takes place through the slotted hole between big shake underframe and the wallboard, through the friction power consumption between the plate, and its deformability begins to exert in the node simultaneously: the relative displacement between the straight sections of the annular steel plate drives the arc-shaped section to deform and consume energy, and simultaneously drives the built-in energy-consuming steel plate to generate shearing deformation to consume energy. It is clear that seismic energy input into the structure can be directed into the connection node by passive control, thereby ensuring the safety of the main structure and reducing damage to the wall panel from an earthquake.

The invention improves and supplements the energy-consuming connection node form of the existing external wall board and the frame beam, and theoretically, the performance in the actual engineering is more excellent than the existing node connection. The invention can be suitable for earthquakes with various intensities, and the connecting node with the functions of shock absorption and energy consumption is undoubtedly a good choice no matter small earthquakes or large earthquakes.

The above examples of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. It will be apparent to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the disclosure. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.