阅读说明：本技术 一种钢桁梁斜拉桥及其阻尼器连接牛腿装置 (Steel truss girder cable-stayed bridge and bracket connecting device of damper of steel truss girder cable-stayed bridge ) 是由 李方柯 王冰 高磊 苏国明 胡明 郭波 王合希 朱勇战 黄庭森 于 2020-07-30 设计创作，主要内容包括：本发明涉及桥梁工程技术领域,具体地,涉及一种钢桁梁斜拉桥及其阻尼器连接牛腿装置。该阻尼器连接牛腿装置包括牛腿结构、上底座、下底座、阻尼器或梁塔纵向固定装置或钢桁梁顶推装置；牛腿结构固定连接于钢桁梁的下弦杆节点外侧；上底座固定安装于牛腿结构的底部；下底座固定安装于桥塔横梁的顶部；阻尼器、梁塔纵向固定装置或钢桁梁顶推装置的一端铰接于上底座、另一端铰接于下底座；梁塔纵向固定装置用于对钢桁梁进行沿桥纵向约束；钢桁梁顶推装置用于对钢桁梁进行沿桥纵向移位。上述阻尼器连接牛腿装置具有工作空间大、操作方便、操作安全风险低、能够布置多个阻尼器、功能多样的优点。(The invention relates to the technical field of bridge engineering, in particular to a steel truss girder cable-stayed bridge and a bracket connecting device for a damper of the steel truss girder cable-stayed bridge. The bracket connecting device for the damper comprises a bracket structure, an upper base, a lower base, a damper or a beam tower longitudinal fixing device or a steel truss beam pushing device; the bracket structure is fixedly connected to the outer side of the lower chord member node of the steel truss girder; the upper base is fixedly arranged at the bottom of the bracket structure; the lower base is fixedly arranged at the top of the bridge tower beam; one end of the damper and the beam tower longitudinal fixing device or the steel truss pushing device is hinged to the upper base, and the other end of the damper and the beam tower longitudinal fixing device or the steel truss pushing device is hinged to the lower base; the beam tower longitudinal fixing device is used for longitudinally restraining the steel truss girder along the bridge; the steel truss girder pushing device is used for longitudinally moving the steel truss girder along the bridge. The bracket device is connected to above-mentioned attenuator has that working space is big, convenient operation, operation safety risk are low, can arrange a plurality of attenuators, the manifold advantage of function.)

1. A bracket connecting device for a damper of a steel truss girder cable-stayed bridge is characterized by comprising a bracket structure, an upper base, a lower base, a damper or a beam tower longitudinal fixing device or a steel truss girder pushing device;

the bracket structure is fixedly connected to the outer side of the lower chord member node of the steel truss girder;

the upper base is fixedly arranged at the bottom of the bracket structure;

the lower base is fixedly arranged at the top of the bridge tower beam;

one end of the damper, the beam tower longitudinal fixing device or the steel truss pushing device is hinged to the upper base, and the other end of the damper is hinged to the lower base;

the beam tower longitudinal fixing device is used for longitudinally restraining the steel truss girder along a bridge;

the steel truss girder pushing device is used for longitudinally moving the steel truss girder along the bridge.

2. The damper connection bracket device of claim 1, wherein the bracket structure is a box-type structure comprising a bracket bottom plate and a bracket top plate arranged oppositely and at least two bracket webs fixedly connected between the bracket bottom plate and the bracket top plate;

the bracket bottom plate is fixedly connected to the bottom plate of the lower chord node;

the bracket top plate is fixedly connected to the web plate of the lower chord node;

the bracket web is fixedly connected with the web and the bottom plate.

3. The damper connection bracket device of claim 2, wherein the bracket structure further comprises a bracket web stiffener fixedly connected to each of the bracket bottom plate, the bracket web, and the bracket top plate.

4. The damper attachment bracket device of claim 2 wherein said bracket base plate is of unitary construction with said base plate of said lower chord node.

5. The damper connection bracket device of claim 2, wherein said upper base is fixedly mounted to said bracket pan by an upper connector;

the lower base is fixedly arranged on the bridge tower cross beam through a lower connecting piece.

6. The bracket device is connected to attenuator according to claim 5, characterized in that down connecting piece includes pre-buried in the bridge tower crossbeam connecting anchor and with the nut of connecting anchor threaded connection.

7. The damper attachment bracket device of claim 1 wherein two of said upper mounts are mounted to the bottom of said bracket structure;

the top of the bridge tower cross beam is provided with two lower bases which correspond to the two upper bases one to one;

and one damper, the beam-tower longitudinal fixing device or the steel truss girder pushing device is arranged between the upper base and the lower base which correspond to each other.

8. The damper connecting bracket device according to claim 7, wherein two of the upper bases are arranged in a width direction of the steel truss cable-stayed bridge;

the two lower bases are arranged along the length direction of the steel truss girder cable-stayed bridge.

9. The damper connecting bracket device according to any one of claims 1 to 8, wherein said steel truss jacking device comprises a longitudinal restraining bar, a jack and a jack reaction seat;

the two ends of the jack are respectively provided with the jack counter-force seat, one jack counter-force seat is hinged to the lower base, and the other jack counter-force seat is arranged at one end of the longitudinal restraining rod;

the other end of the longitudinal restraint rod is hinged to the upper base.

10. A damper connection corbel device according to any of claims 1-8, wherein the beam-tower longitudinal fixture is a longitudinal restraining bar.

11. A steel truss cable-stayed bridge comprising a pylon cross beam and a steel truss, characterized by further comprising a damper connecting corbel device according to any one of claims 1 to 10; the bracket structure of the damper connecting bracket device is fixedly connected to the steel truss girder; the lower base of the damper connecting bracket device is fixedly arranged on the bridge tower cross beam.

Technical Field

The application relates to the technical field of bridge engineering, in particular to a steel truss girder cable-stayed bridge and a bracket connecting device for a damper of the steel truss girder cable-stayed bridge.

Background

Modern cable-stayed bridges mostly adopt floating or semi-floating systems, namely, longitudinal or transverse restraint is not generated between a main beam and a tower pier. In order to avoid the main beam from generating excessive displacement under the external action of vehicles, earthquakes and the like and endanger the structural safety, a damper is usually arranged between the main beam and a tower pier of the cable-stayed bridge to limit the horizontal displacement of the main beam.

For a steel truss girder cable-stayed bridge, a common damper is connected through an upper base at the bottom of a main girder and a lower base at the top of a pier or the top of a bridge tower beam), and the damper is horizontally and longitudinally arranged or obliquely arranged. The existing damper connecting device of the steel truss girder cable-stayed bridge is small in working space, inconvenient to operate and only capable of arranging one damper and single in function because the damper is installed at the bottom of the main beam, and the upper base of the damper needs to be connected with the lower chord of the steel truss girder, so that the damper connecting device of the existing steel truss girder cable-stayed bridge needs to be installed or dismantled by hoisting equipment and special transverse moving equipment.

Disclosure of Invention

The embodiment of the application provides a steel truss girder cable-stayed bridge and a bracket device is connected to attenuator thereof to solve the problem that the attenuator connecting device of the existing steel truss girder cable-stayed bridge has little working space, inconvenient operation, can only arrange an attenuator and single function.

According to a first aspect of the embodiments of the present application, there is provided a damper connecting bracket device of a steel truss cable-stayed bridge, the damper connecting bracket device comprising a bracket structure, an upper base, a lower base, a damper or a beam tower longitudinal fixing device or a steel truss pushing device;

the bracket structure is fixedly connected to the outer side of the lower chord member node of the steel truss girder;

the upper base is fixedly arranged at the bottom of the bracket structure;

the lower base is fixedly arranged at the top of the bridge tower beam;

one end of the damper, the beam tower longitudinal fixing device or the steel truss pushing device is hinged to the upper base, and the other end of the damper is hinged to the lower base;

the beam tower longitudinal fixing device is used for longitudinally restraining the steel truss girder along a bridge;

the steel truss girder pushing device is used for longitudinally moving the steel truss girder along the bridge.

Preferably, the bracket structure is a box-type structure and comprises a bracket bottom plate, a bracket top plate and at least two bracket webs, wherein the bracket bottom plate and the bracket top plate are oppositely arranged, and the at least two bracket webs are fixedly connected between the bracket bottom plate and the bracket top plate;

the bracket bottom plate is fixedly connected to the bottom plate of the lower chord node;

the bracket top plate is fixedly connected to the web plate of the lower chord node;

the bracket web is fixedly connected with the web and the bottom plate;

preferably, the bracket structure further comprises a bracket web stiffening plate fixedly connected with the bracket bottom plate, the bracket web and the bracket top plate.

Preferably, the bracket bottom plate and the bottom plate of the lower chord node are of an integral structure.

Preferably, the upper base is fixedly mounted on the bracket bottom plate through an upper connecting piece;

the lower base is fixedly arranged on the bridge tower cross beam through a lower connecting piece.

Preferably, the lower connecting piece comprises a connecting anchor bolt embedded in the bridge tower cross beam and a nut in threaded connection with the connecting anchor bolt.

Preferably, two upper bases are mounted at the bottom of the corbel structure;

the top of the bridge tower cross beam is provided with two lower bases which correspond to the two upper bases one to one;

and one damper, the beam-tower longitudinal fixing device or the steel truss girder pushing device is arranged between the upper base and the lower base which correspond to each other.

Preferably, the two upper bases are arranged along the width direction of the steel truss girder cable-stayed bridge;

the two lower bases are arranged along the length direction of the steel truss girder cable-stayed bridge.

Preferably, the steel truss girder pushing device comprises a longitudinal restraint rod, a jack and a jack reaction force seat;

the two ends of the jack are respectively provided with the jack counter-force seat, one jack counter-force seat is hinged to the lower base, and the other jack counter-force seat is arranged at one end of the longitudinal restraining rod;

the other end of the longitudinal restraint rod is hinged to the upper base.

Preferably, the beam-tower longitudinal fixing device is a longitudinal restraining rod.

According to a second aspect of the embodiment of the application, a steel truss girder cable-stayed bridge is further provided, which comprises a bridge tower cross beam, a steel truss girder and any one damper connecting bracket device provided by the technical scheme; the bracket structure of the damper connecting bracket device is fixedly connected to the steel truss girder; the lower base of the damper connecting bracket device is fixedly arranged on the bridge tower cross beam.

Adopt steel truss girder cable-stay bridge and attenuator connection bracket device that provides in the embodiment of this application, have following beneficial effect:

according to the bracket connecting device for the damper, the bracket structure is arranged on the outer side of the lower chord of the steel truss girder, and the bases for hinging the dampers are respectively arranged at the bottom of the bracket structure and the top of the bridge tower cross beam, so that the bracket connecting device for the damper is positioned on the outer side of the steel truss girder; a plurality of dampers can be arranged on the bracket structure, and the plane installation angle of the dampers is not limited; simultaneously, both can install a plurality of dampers, also can install other beam pier connecting parts between upper and lower base in cable-stay bridge's installation, if: the steel truss girder pushing device is used for realizing the longitudinal displacement function of the steel truss girder along the longitudinal direction of the bridge, and the beam tower longitudinal fixing device is used for restraining the steel truss girder along the longitudinal direction of the bridge; therefore, the bracket device is connected to above-mentioned attenuator has that working space is big, convenient operation, operation safety risk is low, can arrange a plurality of attenuators, the manifold advantage of function, can solve the attenuator connecting device of current steel truss girder cable-stay bridge and have that working space is little, the operation is inconvenient, only can arrange the problem of a attenuator and function singleness.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic plan view of a bracket connecting device for a damper according to an embodiment of the present disclosure;

FIG. 2 is a schematic elevational view of a first damper of the damper attachment bracket assembly provided in FIG. 1;

FIG. 3 is a schematic elevational view of a second damper of the damper attachment bracket assembly provided in FIG. 1;

FIG. 4 is a schematic structural view of a longitudinal fixing device for a beam tower installed in a steel truss girder cable-stayed bridge construction process;

fig. 5 is a schematic structural diagram of the steel truss girder pushing device installed in the construction process of the steel truss girder cable-stayed bridge.

Reference numerals:

1-steel truss girder lower chord member node; 2-a bracket bottom plate; 3-a corbel web; 4-a corbel top plate; 5-corbel web stiffening plate; 6-a first damper; 7-a second damper; 8-upper base; 9-lower base; 10-an upper connecting piece; 11-lower connecting piece; 12-a bridge tower beam; 13-a longitudinal restraining bar; 14-a pin shaft; 15-a jack; 16-jack reaction force seat.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The embodiment of the application provides a steel truss girder cable-stayed bridge and a damper connecting bracket device thereof, wherein the steel truss girder cable-stayed bridge comprises a bridge tower cross beam, a steel truss girder and a damper connecting bracket device; in the steel truss girder cable-stayed bridge, the steel truss girder is used as a main girder, and the bridge tower is used as a cable tower; a stay cable is connected between the bridge tower and the steel truss girder; the damper connecting bracket device is positioned between the bridge tower and the steel truss girder and used for installing a damper and limiting the horizontal displacement of the steel truss girder through the damper; the bracket structure of the damper connecting bracket device is fixedly connected to the steel truss girder; the lower base of the damper connecting bracket device is fixedly arranged on the bridge tower cross beam. In this application embodiment, the length direction of steel longeron cable-stay bridge is vertical, and the width direction of steel longeron cable-stay bridge is horizontal, and the direction of height of steel longeron cable-stay bridge is vertical.

The concrete structure of the bracket connecting device for the damper adopted in the steel truss girder cable-stayed bridge is as follows:

as shown in fig. 1, fig. 2 and fig. 3, the bracket connecting device for the damper of the steel truss cable-stayed bridge comprises a bracket structure, an upper base 8, a lower base 9, a longitudinal fixing device of the damper or a beam tower or a steel truss pushing device;

the bracket structure is fixedly connected to the outer side of the lower chord member node of the steel truss girder, namely, the bracket structure is positioned on the outer side of the steel truss girder in the width direction and can provide a wide installation space for the damper; the bracket structure can be a box-type structure and comprises a bracket bottom plate 2, a bracket top plate 4 and at least two bracket webs 3, wherein the bracket bottom plate 2 and the bracket top plate 4 are arranged oppositely, and the at least two bracket webs 3 are fixedly connected between the bracket bottom plate 2 and the bracket top plate 4; the bracket bottom plate 2 is fixedly connected to the bottom plate of the lower chord member node, and the bracket bottom plate 2 and the bottom plate of the lower chord member node can be of an integral structure, namely, the bracket bottom plate 2 can be formed by the extending part of the bottom plate of the steel truss girder lower chord member node 1; the bracket top plate 4 is fixedly connected to a web plate of the lower chord member node, and the bracket top plate 4 can be aligned with the top plate of the steel truss girder lower chord member node 1; the bracket web 3 is fixedly connected with the web and the bottom plate; the bracket structure can also comprise a bracket web stiffening plate 5 fixedly connected with the bracket bottom plate 2, the bracket web 3 and the bracket top plate 4; the fixed connection among the bracket bottom plate 2, the bracket web 3, the bracket top plate 4 and the bracket web stiffening plate 5 of the bracket structure can be realized by welding, riveting and bolting;

as shown in the structure of fig. 2 and 3, the upper base 8 is fixedly arranged at the bottom of the bracket structure; when the bracket structure is a box-type structure formed by a bracket bottom plate 2, a bracket web 3 and a bracket top plate 4, the upper base 8 can be fixedly arranged on the bracket bottom plate 2 through an upper connecting piece 10, and when the bracket bottom plate 2 and the bottom plate of the lower chord node can be of an integrated structure, the upper base 8 is fixedly arranged on the bottom plate of the lower chord node, and the upper connecting piece 10 can be a rivet, a bolt and a nut which are matched with threads and the like;

as shown in the structures of fig. 2 and 3, the lower base 9 is fixedly installed on the top of the bridge tower beam 12, and the lower base 9 can be fixedly installed on the bridge tower beam 12 through the lower connecting piece 11; the lower connecting piece 11 can comprise a connecting anchor embedded in the bridge tower cross beam 12 and a nut in threaded connection with the connecting anchor;

as shown in the structures of fig. 3, 4 and 5, one end of the damper and the beam tower longitudinal fixing device or the steel truss pushing device is hinged to the upper base 8, and the other end is hinged to the lower base 9; as shown in the structures of fig. 2 and 3, in the embodiment of the present application, the damper is described by taking a first damper 6 and a second damper 7 as an example, both ends of the first damper 6 are hinged between an upper base 8 and a lower base 9 through a pin 14, and both ends of the second damper 7 are hinged between the upper base 8 and the lower base 9 through a pin 14; in the construction process of the cable-stayed bridge, the damper can be replaced by a beam tower longitudinal fixing device or a steel truss girder pushing device, and the longitudinal constraint function of the main girder in the construction process of the cable-stayed bridge is realized through the beam tower longitudinal fixing device or the longitudinal displacement function of the main girder in the construction process of the cable-stayed bridge is realized through the steel truss girder pushing device; as shown in the structure of fig. 4, the beam tower longitudinal fixing device is used for restraining the steel truss girder along the longitudinal direction of the bridge; the beam tower longitudinal fixing device can be a longitudinal restraint rod 13, as shown in the structure of fig. 4, two ends of the longitudinal restraint rod 13 are hinged to the upper base 8 and the lower base 9 through pin shafts 14; as shown in the structure of fig. 5, the steel truss pushing device is used for longitudinally displacing the steel truss along the bridge; the steel truss girder pushing device can comprise a longitudinal restraint rod 13, jacks 15 and jack reaction seats 16, wherein the two ends of each jack 15 are respectively provided with one jack reaction seat 16, one jack reaction seat 16 is hinged to the lower base 9 through a pin shaft 14, and the other jack reaction seat 16 is arranged at one end of the longitudinal restraint rod 13; the other end of the longitudinal restraint rod 13 is hinged to the upper base 8 through a pin 14.

The bracket structure is arranged on the outer side of the lower chord of the steel truss beam by the damper connecting bracket device, and bases for hinging the dampers are respectively arranged at the bottom of the bracket structure and the top of the bridge tower cross beam 12, so that the damper connecting bracket device is positioned on the outer side of the steel truss beam; a plurality of dampers can be arranged on the bracket structure, and the plane installation angle of the dampers is not limited; simultaneously, both can install a plurality of dampers, also can install other beam pier connecting parts at the installation in-process of cable-stay bridge between upper and lower base 9, if: the steel truss girder pushing device is used for realizing the longitudinal displacement function of the steel truss girder along the longitudinal direction of the bridge, and the beam tower longitudinal fixing device is used for restraining the steel truss girder along the longitudinal direction of the bridge; therefore, the bracket device is connected to above-mentioned attenuator has that working space is big, convenient operation, operation safety risk is low, can arrange a plurality of attenuators, the manifold advantage of function, can solve the attenuator connecting device of current steel truss girder cable-stay bridge and have that working space is little, the operation is inconvenient, only can arrange the problem of a attenuator and function singleness.

In a specific embodiment, the bracket structure can be a box-type structure and comprises a bracket bottom plate 2 and a bracket top plate 4 which are oppositely arranged and at least two bracket webs 3 fixedly connected between the bracket bottom plate 2 and the bracket top plate 4, wherein both the bracket bottom plate 2 and the bracket top plate 4 can be arranged along the horizontal direction, the bracket webs 3 are arranged at intervals along the vertical direction, the bracket bottom plate 2 and the bracket top plate 4 can be arranged in parallel, and 2, 3 or more bracket webs 3 can be arranged; the bracket bottom plate 2 is fixedly connected to the bottom plate of the lower chord node, the bracket bottom plate 2 and the bottom plate of the lower chord node can be of a split structure or an integrated structure, and when the bracket bottom plate 2 and the bottom plate of the lower chord node are of an integrated structure, the bracket bottom plate 2 can be formed by an extending part of the bottom plate of the lower chord node 1 of the steel truss girder; the bracket top plate 4 is fixedly connected to a web plate of the lower chord member node, and the bracket top plate 4 can be aligned with the top plate of the steel truss girder lower chord member node 1; and the bracket web 3 is fixedly connected to the web and the bottom plate of the lower chord node. In order to further improve the structural strength and rigidity of the bracket structure, the bracket structure can also comprise a bracket web stiffening plate 5 fixedly connected with the bracket bottom plate 2, the bracket web 3 and the bracket top plate 4; the bracket bottom plate 2, the bracket web 3, the bracket top plate 4 and the bracket web stiffening plate 5 of the bracket structure can be fixedly connected through welding, riveting and bolting. The bracket bottom plate 2, the bracket web 3, the bracket top plate 4 and the bracket web stiffening plate 5 can be made of steel plates.

Because the bracket structure is the box structure that is formed by bracket bottom plate 2, bracket web 3 and bracket roof 4, the box structure has higher structural strength and rigidity, consequently, the bracket structure that adopts the box structure has higher structural strength and rigidity, can guarantee to install the stability and the reliability of the structural attenuator of bracket, simultaneously, still is favorable to the transmission of the load of attenuator.

As shown in the structure of fig. 1, in order to facilitate installation of a plurality of dampers, two upper bases 8 or a plurality of upper bases 8 may be installed at the bottom of the corbel structure; the lower bases 9 corresponding to the two upper bases 8 or the plurality of upper bases 8 in a one-to-one manner are mounted at the top of the bridge tower beam 12, namely, when the two upper bases 8 can be mounted at the bottom of the corbel structure, two lower bases 9 are mounted at the top of the bridge tower beam 12, and when the plurality of upper bases 8 can be mounted at the bottom of the corbel structure, the plurality of lower bases 9 are mounted at the top of the bridge tower beam 12, and the upper bases 8 and the lower bases 9 are in one-to-one correspondence in position and number; a damper, a beam-tower longitudinal fixing device or a steel truss beam pushing device are arranged between the upper base 8 and the lower base 9 which correspond to each other; the two dampers may be a first damper 6 and a second damper 7 as shown in fig. 1, the first damper 6 and the second damper 7 are respectively arranged on both sides of the corbel structure, and of course, the first damper 6 and the second damper 7 may also be simultaneously arranged on the same side of the corbel structure. As shown in the structure of fig. 1, when two upper bases 8 are installed at the bottom of the corbel structure, the two upper bases 8 are arranged along the width direction of the steel truss cable-stayed bridge, and the two lower bases 9 are arranged along the length direction of the steel truss cable-stayed bridge, that is, two dampers installed on the corbel structure extend from the corbel structure toward two directions, respectively. As shown in the structures of fig. 2 and 3, the first damper 6 and the second damper 7 are both horizontally placed, which is beneficial to the transmission of longitudinal horizontal load and the exertion of structural stress.

The damper connecting bracket device can be provided with two or more dampers and can also be used for installing a beam tower longitudinal fixing device or a steel truss beam pushing device in the construction process of a cable-stayed bridge, so that the damper connecting bracket device not only can realize the function of limiting the horizontal displacement of a main beam, but also can facilitate the assembly of the steel truss beam cable-stayed bridge; simultaneously, can improve bearing capacity and reliability through installing two or more dampers, still be favorable to improving the horizontal displacement restriction effect to the girder, further improve steel truss girder cable-stay bridge's stability, security and reliability.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.