A steel truss cable-stayed bridge and its bracket device

Abstract

The present invention relates to the field of bridge engineering technology, and in particular, to a steel truss cable-stayed bridge and its corbel device. The corbel device includes a corbel structure, an upper base, a lower base, a damper or a beam tower longitudinal fixing device or a steel truss pushing device; the corbel structure is fixedly connected to the outside of the lower chord node of the steel truss; the upper base is fixedly installed at the bottom of the corbel structure; the lower base is fixedly installed at the top of the bridge tower crossbeam; one end of the damper, beam tower longitudinal fixing device or steel truss pushing device is hinged to the upper base and the other end is hinged to the lower base; the beam tower longitudinal fixing device is used to constrain the steel truss along the longitudinal direction of the bridge; the steel truss pushing device is used to shift the steel truss along the longitudinal direction of the bridge. The above-mentioned corbel device has the advantages of large working space, convenient operation, low operational safety risk, ability to arrange multiple dampers, and diverse functions.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering, and in particular to a steel truss cable-stayed bridge and a corbel device thereof. Background Art

[0002] Modern cable-stayed bridges often utilize floating or semi-floating systems, meaning there are no longitudinal or lateral constraints between the main girder and tower piers. To prevent excessive girder displacement under external forces such as vehicles and earthquakes, which could compromise the structure, dampers are typically installed between the main girder and tower piers to limit horizontal girder displacement.

[0003] For steel truss cable-stayed bridges, common dampers are connected via an upper base at the bottom of the main beam and a lower base at the top of the pier or the top of the bridge tower beam. The dampers are arranged horizontally and longitudinally or at an angle. Existing damper connection devices for steel truss cable-stayed bridges require not only lifting equipment but also dedicated horizontal moving equipment when installing or removing the dampers, as the dampers are all installed at the bottom of the main beam and the upper base of the dampers must be connected to the lower chord of the steel truss beam. Consequently, existing damper connection devices for steel truss cable-stayed bridges suffer from small working space, inconvenient operation, the ability to only accommodate one damper, and a single function. Summary of the Invention

[0004] The embodiment of the present application provides a steel truss cable-stayed bridge and a corbel device thereof to solve the problems of the damper connection device of the existing steel truss cable-stayed bridge, such as small working space, inconvenient operation, only one damper can be arranged, and single function.

[0005] According to a first aspect of an embodiment of the present application, a corbel device for a steel truss cable-stayed bridge is provided, the corbel device comprising a corbel structure, an upper base, a lower base, a damper or a beam tower longitudinal fixing device or a steel truss beam pushing device;

[0006] The corbel structure is fixedly connected to the outer side of the lower chord node of the steel truss;

[0007] The upper base is fixedly mounted on the bottom of the corbel structure;

[0008] The lower base is fixedly mounted on the top of the bridge tower beam;

[0009] One end of the damper, the beam tower longitudinal fixing device or the steel truss beam pushing device is hinged to the upper base, and the other end is hinged to the lower base;

[0010] The longitudinal fixing device of the beam tower is used to restrain the steel truss along the longitudinal direction of the bridge;

[0011] The steel truss girder pushing device is used to shift the steel truss girder longitudinally along the bridge.

[0012] Preferably, the corbel structure is a box-type structure, comprising a corbel bottom plate and a corbel top plate arranged opposite to each other, and at least two corbel webs fixedly connected between the corbel bottom plate and the corbel top plate;

[0013] The corbel bottom plate is fixedly connected to the bottom plate of the lower chord node;

[0014] The corbel top plate is fixedly connected to the web of the lower chord node;

[0015] The corbel web is fixedly connected to the web and the bottom plate;

[0016] Preferably, the corbel structure further comprises a corbel web stiffening plate fixedly connected to the corbel bottom plate, the corbel web and the corbel top plate.

[0017] Preferably, the corbel bottom plate and the bottom plate of the lower chord node are an integral structure.

[0018] Preferably, the upper base is fixedly mounted on the corbel bottom plate via an upper connecting piece;

[0019] The lower base is fixedly mounted on the bridge tower cross beam via a lower connecting piece.

[0020] Preferably, the lower connecting member includes a connecting anchor bolt embedded in the bridge tower cross beam and a nut threadedly connected to the connecting anchor bolt.

[0021] Preferably, two upper bases are installed at the bottom of the corbel structure;

[0022] Two lower bases corresponding to the two upper bases are installed on the top of the bridge tower crossbeam;

[0023] A damper, a longitudinal fixing device for the beam tower or a steel truss beam pushing device is installed between the upper base and the lower base corresponding to each other.

[0024] Preferably, the two upper bases are arranged along the width direction of the steel truss cable-stayed bridge;

[0025] The two lower bases are arranged along the length direction of the steel truss cable-stayed bridge.

[0026] Preferably, the steel truss girder pushing device includes a longitudinal restraining rod, a jack and a jack reaction seat;

[0027] A jack reaction seat is installed at each end of the jack, wherein one jack reaction seat is hinged to the lower base, and the other jack reaction seat is installed at one end of the longitudinal restraining rod;

[0028] The other end of the longitudinal restraint rod is hinged to the upper base.

[0029] Preferably, the beam tower longitudinal fixing device is a longitudinal restraining rod.

[0030] According to the second aspect of the embodiment of the present application, a steel truss cable-stayed bridge is also provided, comprising a bridge tower crossbeam and a steel truss, and also comprising any one of the corbel devices provided by the above technical solution; the corbel structure of the corbel device is fixedly connected to the steel truss; the lower base of the corbel device is fixedly installed on the bridge tower crossbeam.

[0031] The steel truss cable-stayed bridge and the corbel device thereof provided in the embodiments of the present application have the following beneficial effects:

[0032] The above-mentioned corbel device sets the corbel structure on the outside of the lower chord of the steel truss, and installs bases for articulating the damper at the bottom of the corbel structure and the top of the bridge tower crossbeam respectively, so that the corbel device is located on the outside of the steel truss. Compared with the prior art of installing the damper at the bottom of the main beam, the damper installation position has a large working space, which is convenient for installation, maintenance and replacement, and easy to operate. In addition, the working space of the damper is within the range of the pier and tower platform, and the operational safety risk is low. Multiple dampers can be installed on the corbel structure, and the plane installation angle of the damper is not restricted. At the same time, multiple dampers can be installed Dampers can also be installed between the upper and lower bases during the installation of the cable-stayed bridge. Other beam-pier connecting components, such as: a steel truss pushing device for realizing the longitudinal displacement of the steel truss along the longitudinal direction of the bridge, and a beam tower longitudinal fixing device for restraining the steel truss along the longitudinal direction of the bridge; therefore, the above-mentioned bracket device has the advantages of large working space, convenient operation, low operational safety risk, ability to arrange multiple dampers, and diverse functions, which can solve the problems of the damper connection device of the existing steel truss cable-stayed bridge, such as small working space, inconvenient operation, only being able to arrange one damper and single function. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0034] Figure 1 A schematic diagram of the planar structure of a bracket device provided in an embodiment of the present application;

[0035] Figure 2 for Figure 1 A schematic elevational structural diagram of the first damper of the corbel device provided in;

[0036] Figure 3 for Figure 1 A schematic elevational structural diagram of the second damper of the corbel device provided in;

[0037] Figure 4 This is a schematic diagram of the structure of the longitudinal fixing device for the girder tower during the construction of the steel truss cable-stayed bridge;

[0038] Figure 5 This is a structural diagram of the installation of a steel truss girder jacking device during the construction of a steel truss girder cable-stayed bridge.

[0039] Reference numerals:

[0040] 1-Steel truss lower chord node; 2-Corbel bottom plate; 3-Corbel web; 4-Corbel top plate; 5-Corbel web stiffener; 6-First damper; 7-Second damper; 8-Upper base; 9-Lower base; 10-Upper connector; 11-Lower connector; 12-Bridge tower crossbeam; 13-Longitudinal restraint rod; 14-Pin shaft; 15-Jack; 16-Jack reaction seat. DETAILED DESCRIPTION

[0041] In order to make the technical solutions and advantages of the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, and are not an exhaustive list of all the embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other unless they conflict.

[0042] The present application provides a steel truss cable-stayed bridge and a corbel device thereof. The steel truss cable-stayed bridge includes a tower crossbeam, a steel truss, and a corbel device. In the steel truss cable-stayed bridge, the steel truss serves as the main beam, and the tower serves as the cable tower. A stay cable is connected between the tower and the steel truss. The corbel device is located between the tower and the steel truss and is used to install a damper that limits the horizontal displacement of the steel truss. The corbel structure of the corbel device is fixedly connected to the steel truss. The lower base of the corbel device is fixedly mounted to the tower crossbeam. In the present application, the length direction of the steel truss cable-stayed bridge is the longitudinal direction, the width direction of the steel truss cable-stayed bridge is the transverse direction, and the height direction of the steel truss cable-stayed bridge is the vertical direction.

[0043] The specific structure of the bracket device used in the above-mentioned steel truss cable-stayed bridge is as follows:

[0044] like Figure 1 、 Figure 2 and Figure 3 As shown in the structure, the corbel device for a steel truss cable-stayed bridge includes a corbel structure, an upper base 8, a lower base 9, a damper or a longitudinal fixing device for a beam tower or a steel truss beam pushing device;

[0045] The corbel structure is fixedly connected to the outer side of the lower chord node of the steel truss, that is, the corbel structure is located on the outer side of the width direction of the steel truss, which can provide a wide installation space for the damper; the corbel structure can be a box-type structure, and includes a corbel bottom plate 2 and a corbel top plate 4 arranged opposite to each other, and at least two corbel webs 3 fixedly connected between the corbel bottom plate 2 and the corbel top plate 4; the corbel bottom plate 2 is fixedly connected to the bottom plate of the lower chord node, and the corbel bottom plate 2 and the bottom plate of the lower chord node can be an integrated structure, that is, the corbel bottom plate 2 can be made of The corbel structure is composed of an overhanging portion of the bottom plate of the lower chord node 1 of the steel truss girder; the corbel top plate 4 is fixedly connected to the web of the lower chord node, and the corbel top plate 4 can be aligned with the top plate of the lower chord node 1 of the steel truss girder; the corbel web 3 is fixedly connected to the web and the bottom plate; the corbel structure can also include a corbel web stiffening plate 5 fixedly connected to the corbel bottom plate 2, the corbel web 3 and the corbel top plate 4; the fixed connection between the corbel bottom plate 2, the corbel web 3, the corbel top plate 4 and the corbel web stiffening plate 5 of the corbel structure can be achieved by welding, riveting or bolting;

[0046] like Figure 2 and Figure 3 As shown in the structure, the upper base 8 is fixedly mounted on the bottom of the corbel structure; when the corbel structure is a box-type structure formed by the corbel bottom plate 2, the corbel web 3 and the corbel top plate 4, the upper base 8 can be fixedly mounted on the corbel bottom plate 2 through the upper connecting piece 10, and when the corbel bottom plate 2 and the bottom plate of the lower chord node can be an integral structure, the upper base 8 is fixedly mounted on the bottom plate of the lower chord node, and the upper connecting piece 10 can be a rivet, a bolt and a nut with threaded fit, etc.

[0047] like Figure 2 and Figure 3 As shown in the structure, 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 member 11; the lower connecting member 11 may include a connecting anchor pre-embedded in the bridge tower beam 12 and a nut threadedly connected to the connecting anchor;

[0048] like Figure 3 、 Figure 4 、 Figure 5 As shown in the structure, one end of the damper, the longitudinal fixing device of the beam tower or the steel truss beam pushing device is hinged to the upper base 8, and the other end is hinged to the lower base 9; Figure 2 and Figure 3As shown in the structure, in the embodiment of the present application, the damper is explained by taking the first damper 6 and the second damper 7 as an example. Both ends of the first damper 6 are hinged between the upper base 8 and the lower base 9 through the pin shaft 14, and both ends of the second damper 7 are hinged between the upper base 8 and the lower base 9 through the pin shaft 14; during the construction of the cable-stayed bridge, the damper can be replaced with a longitudinal fixing device of the beam tower or a steel truss beam pushing device, and the longitudinal constraint function of the main beam during the construction of the cable-stayed bridge can be realized by the longitudinal fixing device of the beam tower, or the longitudinal displacement function of the main beam during the construction of the cable-stayed bridge can be realized by the steel truss beam pushing device; as Figure 4 As shown in the structure, the longitudinal fixing device of the beam tower is used to constrain the steel truss along the longitudinal direction of the bridge; the longitudinal fixing device of the beam tower can be a longitudinal constraint rod 13, such as Figure 4 As shown in the structure, both ends of the longitudinal restraint rod 13 are hinged to the upper base 8 and the lower base 9 through the pin 14; Figure 5 As shown in the structure, the steel truss pushing device is used to shift the steel truss along the longitudinal direction of the bridge; the steel truss pushing device may include a longitudinal restraint rod 13, a jack 15 and a jack reaction seat 16, and a jack reaction seat 16 is installed at both ends of the jack 15, wherein 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 installed 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 shaft 14.

[0049] The above-mentioned bracket device sets the bracket structure on the outside of the lower chord of the steel truss, and installs bases for articulating the damper at the bottom of the bracket structure and the top of the bridge tower cross beam 12 respectively, so that the bracket device is located on the outside of the steel truss. Compared with the prior art in which the damper is installed at the bottom of the main beam, the damper installation position has a large working space, which is convenient for installation, maintenance and replacement, and easy to operate. In addition, the working space of the damper is located within the range of the pier and tower platform, and the operational safety risk is low. Multiple dampers can be installed on the bracket structure, and the plane installation angle of the damper is not restricted. At the same time, multiple The damper can also be used to install other beam-pier connecting components between the upper and lower bases 9 during the installation of the cable-stayed bridge, such as: a steel truss pushing device for realizing the longitudinal displacement of the steel truss along the longitudinal direction of the bridge, and a beam tower longitudinal fixing device for restraining the steel truss along the longitudinal direction of the bridge; therefore, the above-mentioned bracket device has the advantages of large working space, convenient operation, low operational safety risk, ability to arrange multiple dampers, and diverse functions, which can solve the problems of the damper connection device of the existing steel truss cable-stayed bridge, such as small working space, inconvenient operation, only being able to arrange one damper and single function.

[0050] In a specific embodiment, the corbel structure can be a box-type structure, and includes a corbel bottom plate 2 and a corbel top plate 4 arranged opposite to each other, and at least two corbel webs 3 fixedly connected between the corbel bottom plate 2 and the corbel top plate 4. The corbel bottom plate 2 and the corbel top plate 4 can be arranged in the horizontal direction, and the corbel webs 3 are arranged at intervals in the vertical direction. The corbel bottom plate 2 and the corbel top plate 4 can be arranged in parallel, and the corbel webs 3 can be provided in 2, 3 or more numbers; the corbel bottom plate 2 is fixed The bottom plate connected to the bottom chord node can be a separate structure or an integrated structure with the bottom plate of the bottom chord node. When the bottom plate of the bottom chord node is an integrated structure, the bottom plate of the bottom chord node can be formed by the overhanging portion of the bottom plate of the steel truss bottom chord node 1. The top plate of the corbel 4 is fixedly connected to the web of the bottom chord node. The top plate of the corbel 4 can be aligned with the top plate of the steel truss bottom chord node 1. The web of the corbel 3 is fixedly connected to the web and bottom plate of the bottom chord node. In order to further improve the structural strength and rigidity of the corbel structure, the corbel structure can also include a corbel web stiffener 5 fixedly connected to the bottom plate 2, the web 3, and the top plate 4. The fixed connection between the bottom plate 2, the web 3, the top plate 4, and the web stiffener 5 of the corbel structure can be achieved by welding, riveting, or bolting. The corbel bottom plate 2, the corbel web 3, the corbel top plate 4 and the corbel web stiffening plate 5 can all be made of steel plates.

[0051] Since the corbel structure is a box-type structure formed by the corbel bottom plate 2, the corbel web 3 and the corbel top plate 4, the box-type structure has high structural strength and rigidity. Therefore, the corbel structure adopting the box-type structure has high structural strength and rigidity, which can ensure the stability and reliability of the damper installed on the corbel structure. At the same time, it is also beneficial to the transfer of the damper's load.

[0052] like Figure 1 As shown in the structure, in order to facilitate the installation of multiple dampers, two upper bases 8 or multiple upper bases 8 can be installed at the bottom of the corbel structure; a lower base 9 corresponding to the two upper bases 8 or multiple upper bases 8 is installed on the top of the bridge tower beam 12, that is, when two upper bases 8 can be installed at the bottom of the corbel structure, two lower bases 9 are installed on the top of the bridge tower beam 12; when multiple upper bases 8 can be installed at the bottom of the corbel structure, multiple lower bases 9 are installed on the top of the bridge tower beam 12, and the upper bases 8 and the lower bases 9 correspond to each other in position and quantity; a damper, a beam tower longitudinal fixing device or a steel truss beam pushing device is installed between the corresponding upper bases 8 and lower bases 9; the two dampers can be as shown in FIG. Figure 1 As shown in the figure, the first damper 6 and the second damper 7 are respectively arranged on both sides of the corbel structure. Of course, the first damper 6 and the second damper 7 can also be arranged on the same side of the corbel structure at the same time. Figure 1As shown in the structure, 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 girder cable-stayed bridge, and the two lower bases 9 are arranged along the length direction of the steel truss girder cable-stayed bridge, that is, the two dampers installed on the corbel structure extend from the corbel structure in two directions respectively. Figure 2 and Figure 3 As shown in the structure, the first damper 6 and the second damper 7 are both placed horizontally, which is beneficial to the transmission of longitudinal horizontal load and the exertion of structural force.

[0053] The above-mentioned corbel device can be installed with two or more dampers, and can also be used to install the longitudinal fixing device of the beam tower or the steel truss pushing device during the construction of the cable-stayed bridge. Therefore, the use of the above-mentioned corbel device can not only realize the function of limiting the horizontal displacement of the main beam, but also facilitate the assembly of the steel truss cable-stayed bridge; at the same time, by installing two or more dampers, the bearing capacity and reliability can be improved, and it is also beneficial to improve the effect of limiting the horizontal displacement of the main beam, further improving the stability, safety and reliability of the steel truss cable-stayed bridge.

[0054] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0055] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A bracket device for a steel truss cable-stayed bridge, characterized in that: Including corbel structure, upper base, lower base, damper or beam tower longitudinal fixing device or steel truss beam pushing device; The corbel structure is fixedly connected to the outer side of the lower chord node of the steel truss; The upper base is fixedly mounted on the bottom of the corbel structure; The lower base is fixedly mounted on the top of the bridge tower beam; One end of the damper, the beam tower longitudinal fixing device or the steel truss beam pushing device is hinged to the upper base, and the other end is hinged to the lower base; The longitudinal fixing device of the beam tower is used to restrain the steel truss along the longitudinal direction of the bridge; The steel truss girder pushing device is used to shift the steel truss girder longitudinally along the bridge; The corbel structure is a box-type structure, comprising a corbel bottom plate and a corbel top plate arranged opposite to each other, and at least two corbel webs fixedly connected between the corbel bottom plate and the corbel top plate; The corbel bottom plate is fixedly connected to the bottom plate of the lower chord node; The corbel top plate is fixedly connected to the web of the lower chord node; The corbel web is fixedly connected to the web and the bottom plate; The corbel structure further includes a corbel web stiffening plate fixedly connected to the corbel bottom plate, the corbel web and the corbel top plate; The corbel bottom plate and the bottom plate of the lower chord node are an integrated structure; The upper base is fixedly mounted on the corbel bottom plate via an upper connecting piece; The lower base is fixedly mounted on the bridge tower crossbeam via a lower connecting piece; The steel truss pushing device includes a longitudinal restraining rod, a jack and a jack reaction seat; A jack reaction seat is installed at each end of the jack, wherein one jack reaction seat is hinged to the lower base, and the other jack reaction seat is installed at one end of the longitudinal restraining rod; The other end of the longitudinal restraining rod is hinged to the upper base; The lower connecting member includes a connecting anchor bolt embedded in the bridge tower cross beam and a nut threadedly connected to the connecting anchor bolt; Two upper bases are installed at the bottom of the corbel structure; Two lower bases corresponding to the two upper bases are installed on the top of the bridge tower crossbeam; A damper, a longitudinal fixing device for the beam tower or a steel truss beam pushing device is installed between the upper base and the lower base corresponding to each other.

2. The bracket device according to claim 1, characterized in that: The two upper bases are arranged along the width direction of the steel truss cable-stayed bridge; The two lower bases are arranged along the length direction of the steel truss cable-stayed bridge.

3. The bracket device according to any one of claims 1-2, characterized in that: The beam tower longitudinal fixing device is a longitudinal restraining rod.

4. A steel truss cable-stayed bridge, comprising a tower beam and a steel truss beam, characterized in that: It also includes a corbel device as described in any one of claims 1 to 3; the corbel structure of the corbel device is fixedly connected to the steel truss; and the lower base of the corbel device is fixedly installed on the bridge tower beam.

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