Bridge anti-seismic structure

Abstract

The utility model relates to the technical field of bridge anti-seismic, in particular to a bridge anti-seismic structure which comprises a base, two supporting columns are fixedly installed on the upper surface of the base, a reinforcing rod is fixedly connected between the upper ends of the two supporting columns, a pressure-bearing beam is installed at the top ends of the supporting columns, and two metal yield dampers are fixedly installed on the two sides of the upper surface of the pressure-bearing beam. And a bridge body is fixedly mounted on the upper surface of the metal yield damper. When an earthquake occurs, the supporting columns and the pressure-bearing beams bear earthquake force together, the force is transmitted to the base through the reinforcing rods and the metal yield dampers, soft steel cores in the metal yield dampers are subjected to plastic deformation under the action of shearing force, earthquake energy is consumed, impact on a bridge body is reduced, and meanwhile the second dampers are driven by the second dampers through relative movement of the push plates and the damping blocks. Damping force is generated, transverse vibration energy is absorbed, the weight of the pressure-bearing beam is reduced through the design of the weight reduction grooves and the reinforcing plates, and meanwhile the strength and rigidity of the structure are kept.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge seismic resistance, and specifically relates to a bridge seismic resistance structure. Background Technique

[0002] A bridge is a part of a road, generally erected over rivers, lakes and seas, and is a structure that enables vehicles and pedestrians to pass smoothly. In order to improve the stability of the bridge, a flexible connection is usually adopted between the bridge and the bridge pier, and a bearing is widely used for connection to achieve seismic resistance and shock mitigation.

[0003] Patent Application No.: 202321935999.X proposes a seismic resistance structure for a steel structure bridge, including a first support column. The top end of the first support column is fixedly connected to a bridge, the side end of the first support column is fixedly connected to a bracket, the bottom end of the bracket is fixedly connected to a second support column, the top end of the bracket is fixedly connected to a first fixing plate, and an installation mechanism is arranged at the top end of the first fixing plate. Through the settings of a rubber pad, an installation mechanism, a rotating mechanism and a limiting mechanism, the utility model completes the separate disassembly and installation of the rubber pad, without replacing the entire seismic resistance component, avoiding waste of useful resources and reducing production costs.

[0004] The damping component on this device is relatively simple, and the damping effect is average. It is difficult to absorb the vibration stress of the bridge body in multiple directions and difficult to meet the usage requirements of the actual situation. Therefore, we propose a bridge seismic resistance structure to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a bridge seismic resistance structure to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A bridge seismic resistance structure includes a base. Two support columns are fixedly installed on the upper surface of the base. A reinforcing rod is fixedly connected between the upper ends of the two support columns. A bearing beam is installed at the top end of the support column. Two metal yield dampers are fixedly installed on both sides of the upper surface of the bearing beam. The upper surface of the metal yield damper is fixedly installed with a bridge body;

[0008] The metal yield damper includes two support plates. Fixed bolts are installed at the four corners of the support plates. The upper support plate is fixedly installed on the bottom surface of the bridge body through the fixed bolts, and the lower support plate is fixedly installed on the upper surface of the bearing beam through the fixed bolts. A plurality of shear stress steel plates are fixedly installed on both sides between the two support plates. Support seats are fixedly installed on the opposite surfaces between the two support plates. A mild steel core is arranged between the two support seats;

[0009] The bottom surface of the pressure-bearing beam is provided with an installation groove, and installation blocks are fixedly installed at the tops of the support columns. The installation blocks are slidably arranged inside the installation groove. The inner wall of the installation groove is fixedly installed with a second damper, and the second damper is connected to the installation block for damping the installation block.

[0010] Preferably, the soft steel core includes a plurality of soft steel plates pasted together and two hard steel plates, and the hard steel plates are pasted on the upper and lower sides of the soft steel plates.

[0011] Preferably, grooves are formed on the opposite surfaces of the support seats, protrusions are arranged on the surfaces of the hard steel plates, and the hard steel plates are clamped inside the grooves through the protrusions.

[0012] Preferably, limiting sliding grooves are formed on the inner walls of the front and rear sides of the installation groove, limiting sliding blocks are fixedly installed on the front and rear surfaces of the installation block, and the limiting sliding blocks are slidably arranged inside the limiting sliding grooves.

[0013] Preferably, the second damper includes a damper shell and a connecting rod. The damper shell is fixedly installed on the inner wall of the installation groove, a damper block is fixedly installed inside the damper shell, one end of the connecting rod is fixedly connected to the surface of the installation block, the other end of the connecting rod slides through and into the inside of the damper shell, and a push plate is fixedly installed at the other end of the connecting rod. The push plate is pasted on the surface of the damper block.

[0014] Preferably, a connecting sleeve plate is fixedly installed on the inner wall of the damper shell, the connecting sleeve plate is sleeved on the outer surface of the push plate, and the contact surfaces of the push plate and the connecting sleeve plate are both rough surfaces.

[0015] Preferably, a weight-reducing groove is formed on the surface of the pressure-bearing beam, and a plurality of reinforcing plates are fixedly installed inside the weight-reducing groove.

[0016] Compared with the prior art, the utility model provides a bridge seismic structure, which has the following beneficial effects:

[0017] 1. In the bridge seismic structure, when an earthquake occurs, the support columns and the pressure-bearing beam jointly bear the earthquake force. The force is transmitted to the base through the reinforcing rods and the metal yield dampers. The soft steel core in the metal yield dampers undergoes plastic deformation under the action of shear force, consuming earthquake energy and reducing the impact on the bridge body. At the same time, the second damper generates a damping force through the relative movement of the push plate and the damper block, absorbing the lateral vibration energy. The design of the weight-reducing groove and the reinforcing plates reduces the weight of the pressure-bearing beam while maintaining the strength and stiffness of the structure. The performance of the metal yield dampers and the second dampers of this device is regularly checked to ensure effective operation during an earthquake. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the utility model;

[0019] Figure 2Schematic structural diagram when the present utility model is opened;

[0020] Figure 3 Schematic structural diagram when the present utility model is closed and fixed;

[0021] Figure 4 Schematic structural diagram of the limiting component of the present utility model.

[0022] In the figure: 1, base; 2, support column; 3, reinforcement rod; 4, limiting chute; 5, bearing beam; 6, metal yielding damper; 61, support plate; 62, fixing bolt; 63, shear stress steel plate; 64, support seat; 65, soft steel plate; 66, hard steel plate; 7, bridge body; 8, second damper; 81, damper shell; 82, damper block; 83, push plate; 84, connecting sleeve plate; 85, connecting rod; 9, weight reduction groove; 10, reinforcement plate; 11, installation groove; 12, installation block; 13, limiting slider. Specific implementation mode

[0023] Please refer to Figures 1-4 , a bridge seismic structure, including a base 1, two support columns 2 are fixedly installed on the upper surface of the base 1, a reinforcement rod 3 is fixedly connected between the upper ends of the two support columns 2, a bearing beam 5 is installed at the top of the support column 2, two metal yielding dampers 6 are fixedly installed on both sides of the upper surface of the bearing beam 5, and a bridge body 7 is fixedly installed on the upper surface of the metal yielding damper 6;

[0024] The metal yielding damper 6 includes two support plates 61, fixing bolts 62 are installed at the four corners of the support plate 61, the upper support plate 61 is fixedly installed on the bottom surface of the bridge body 7 through the fixing bolt 62, the lower support plate 61 is fixedly installed on the upper surface of the bearing beam 5 through the fixing bolt 62, a plurality of shear stress steel plates 63 are fixedly installed on both sides between the two support plates 61, a support seat 64 is fixedly installed on the opposite side between the two support plates 61, and a soft steel core is arranged between the two support seats 64;

[0025] During an earthquake, the support column 2 and the bearing beam 5 jointly bear the seismic force, and the force is transmitted to the base 1 through the reinforcement rod 3 and the metal yielding damper 6. The soft steel core in the metal yielding damper 6 undergoes plastic deformation under the action of shear force, consumes seismic energy, and reduces the impact on the bridge body 7;

[0026] An installation groove 11 is opened on the bottom surface of the bearing beam 5, installation blocks 12 are fixedly installed at the tops of the support columns 2, the installation blocks 12 are slidably arranged inside the installation groove 11, a second damper 8 is fixedly installed on the inner wall of the installation groove 11, and the second damper 8 is connected to the installation block 12 for damping the installation block 12;

[0027] The second damper 8 generates a damping force through the relative movement of the push plate 83 and the damping block 82, absorbing the lateral vibration energy.

[0028] Among them, the mild steel core includes a plurality of mild steel plates 65 pasted together and two hard steel plates 66. The hard steel plates 66 are pasted on the upper and lower sides of the mild steel plate 65. Grooves are provided on the opposite surfaces of the support seat 64. Protrusions are provided on the surface of the hard steel plate 66. The hard steel plate 66 is clamped inside the groove through the protrusion to prevent the mild steel core from slipping out between the support seats 64, affecting the normal use of the device.

[0029] Furthermore, limiting sliding grooves 4 are provided on the inner walls of the front and rear sides of the installation groove 11. Limiting sliding blocks 13 are fixedly installed on the front and rear surfaces of the installation block 12. The limiting sliding blocks 13 are all slidably arranged inside the limiting sliding grooves 4 to prevent the installation block 12 from slipping out of the installation groove 11, affecting the support for the bridge body 7.

[0030] Among them, the second damper 8 includes a damping shell 81 and a connecting rod 85. The damping shell 81 is fixedly installed on the inner wall of the installation groove 11. A damping block 82 is fixedly installed inside the damping shell 81. One end of the connecting rod 85 is fixedly connected to the surface of the installation block 12. The other end of the connecting rod 85 slides through the inside of the damping shell 81. A push plate 83 is fixedly installed at the other end of the connecting rod 85. The push plate 83 is pasted on the surface of the damping block 82. When the bridge body 7 undergoes a lateral displacement, the installation block 12 will slide in the installation groove 11, pushing the connecting rod 85 to move. The connecting rod 85 squeezes the damping block 82 by pushing the push plate 83, generating a damping force and absorbing the lateral vibration energy.

[0031] Furthermore, a connecting sleeve plate 84 is fixedly installed on the inner wall of the damping shell 81. The connecting sleeve plate 84 is sleeved on the outer surface of the push plate 83. The contact surfaces of the push plate 83 and the connecting sleeve plate 84 are both rough surfaces. When the push plate 83 slides inside the connecting sleeve plate 84, the friction surfaces rub against each other, generating heat, which is convenient for further absorbing the vibration force.

[0032] Furthermore, a weight-reducing groove 9 is provided on the surface of the bearing beam 5. A plurality of reinforcing plates 10 are fixedly installed inside the weight-reducing groove 9 to reduce the structural weight and enhance the stability.

[0033] Working principle: For this bridge seismic structure, during an earthquake, the support column 2 and the pressure-bearing beam 5 jointly bear the seismic force. The force is transmitted to the base 1 through the reinforcement rod 3 and the metal yielding damper 6. The mild steel core in the metal yielding damper 6 undergoes plastic deformation under the action of shear force, consuming seismic energy and reducing the impact on the bridge body 7. At the same time, the second damper 8 generates a damping force through the relative movement of the push plate 83 and the damping block 82, absorbing the lateral vibration energy. The design of the weight reduction groove 9 and the reinforcement plate 10 reduces the weight of the pressure-bearing beam 5 while maintaining the strength and stiffness of the structure. The performance of the metal yielding damper 6 and the second damper 8 of this device is regularly inspected to ensure effective operation during an earthquake.

Claims

1. A bridge seismic structure, comprising a base (1), characterized in that: On the upper surface of the base (1), two support columns (2) are fixedly installed. Between the upper ends of the two support columns (2), a reinforcing rod (3) is fixedly connected. At the top of the support column (2), a bearing beam (5) is installed. On both sides of the upper surface of the bearing beam (5), two metal yield dampers (6) are fixedly installed. On the upper surface of the metal yield damper (6), a bridge body (7) is fixedly installed; The metal yield damper (6) includes two support plates (61). At the four corners of the support plate (61), fixing bolts (62) are installed. The upper support plate (61) is fixedly installed on the bottom surface of the bridge body (7) through the fixing bolts (62). The lower support plate (61) is fixedly installed on the upper surface of the bearing beam (5) through the fixing bolts (62). On both sides between the two support plates (61), a plurality of shear stress steel plates (63) are fixedly installed. On the opposite surfaces of the two support plates (61), support seats (64) are fixedly installed. Between the two support seats (64), a mild steel core is provided; On the bottom surface of the bearing beam (5), an installation groove (11) is opened. At the top of the support column (2), installation blocks (12) are fixedly installed. The installation blocks (12) are slidably arranged inside the installation groove (11). On the inner wall of the installation groove (11), a second damper (8) is fixedly installed. The second damper (8) is connected to the installation block (12) for damping the installation block (12).

2. The aseismic structure of a bridge according to claim 1, characterized in that: The mild steel core includes a plurality of mild steel plates (65) pasted together and two hard steel plates (66). The hard steel plates (66) are pasted on the upper and lower sides of the mild steel plates (65).

3. The aseismic structure of a bridge according to claim 2, characterized in that: On the opposite surfaces of the support seats (64), grooves are opened. On the surface of the hard steel plate (66), convex blocks are provided. The hard steel plate (66) is clamped inside the groove through the convex blocks.

4. A bridge seismic structure according to claim 1, characterized in that: On the front and rear inner walls of the installation groove (11), limiting sliding grooves (4) are opened. On the front and rear surfaces of the installation block (12), limiting sliding blocks (13) are fixedly installed. The limiting sliding blocks (13) are slidably arranged inside the limiting sliding grooves (4).

5. A bridge seismic structure according to claim 1, characterized in that: The second damper (8) includes a damper shell (81) and a connecting rod (85). The damper shell (81) is fixedly installed on the inner wall of the installation groove (11). Inside the damper shell (81), a damper block (82) is fixedly installed. One end of the connecting rod (85) is fixedly connected to the surface of the installation block (12). The other end of the connecting rod (85) slidably penetrates into the damper shell (81). At the other end of the connecting rod (85), a push plate (83) is fixedly installed. The push plate (83) is pasted on the surface of the damper block (82).

6. The aseismic structure of a bridge according to claim 5, characterized in that: On the inner wall of the damper shell (81), a connecting sleeve plate (84) is fixedly installed. The connecting sleeve plate (84) is sleeved on the outer surface of the push plate (83). The contact surfaces of the push plate (83) and the connecting sleeve plate (84) are both rough surfaces.

7. The aseismic structure of a bridge according to claim 5, characterized in that: On the surface of the bearing beam (5), a weight reduction groove (9) is opened. Inside the weight reduction groove (9), a plurality of reinforcing plates (10) are fixedly installed.

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