Anti-seismic support for roads and bridges

Abstract

The utility model relates to the technical field of anti-seismic supports, in particular to a road bridge anti-seismic support which comprises a lower steel plate, an upper steel plate and a damping assembly, the upper steel plate is slidably connected to the upper portion of the lower steel plate, the damping assembly is arranged on the lower surface of the upper steel plate, and the damping assembly is arranged on the upper surface of the lower steel plate. The damping assembly comprises a first damping block, the upper surface of the lower steel plate is fixedly connected with the first damping block, the side surface of the first damping block is fixedly connected with a first limiting rod, one side of the first damping block is fixedly connected with a first speed reduction spring, and the free end of the first speed reduction spring is fixedly connected with a first linkage frame. According to the shock absorption support system, by arranging the shock absorption assembly, earthquake energy can be more effectively absorbed when a road or a bridge vibrates, then the earthquake absorption capacity of the support system is greatly improved, earthquake force transmitted to a bridge main body structure is reduced, and the earthquake energy absorption capacity is further improved.

Description

Technical Field

[0001] This utility model relates to the field of seismic bearing technology, and in particular to a seismic bearing for road bridges. Background Technology

[0002] In-depth research on the characteristics of seismic waves is an important foundation for the development of seismic bearing technology. Seismic waves include various types such as P-waves, S-waves, and surface waves. Different types of seismic waves have different effects on bridge structures. For example, S-waves can cause horizontal vibrations and displacements in bridges, while surface waves may cause more complex torsional and vertical vibrations. Through seismic monitoring networks and seismological theoretical research, people can accurately grasp the propagation laws, frequency ranges, peak ground accelerations, and other key parameters of seismic waves. These parameters provide target performance indicators for the design of seismic bearings, such as the horizontal and vertical bearing capacity, displacement range, and damping characteristics of the bearings, so that they can effectively resist various forces under specific seismic motions.

[0003] Existing technologies, such as the utility model patent with publication number CN208105031U, disclose a seismic bearing for road bridges. This patent uses a bearing pad, with a pier fixedly connected to the bottom of the bearing pad, a lower steel plate fixedly connected to the top of the bearing pad, a lower PTFE plate fixedly connected to the top of the lower steel plate, and fixed columns fixedly connected to the left and right ends of the top of the lower PTFE plate. A spring is fixedly connected to the bottom of the inner cavity of the fixed column, and a connecting column is fixedly connected to the top of the spring, extending through and to the outer side of the top of the fixed column. An upper PTFE plate is fixedly connected to the top of the connecting column. This seismic bearing for road bridges, through the arrangement of the fixed column, spring, connecting column, and rubber pad, ensures that when the beam is under pressure, the upper steel plate and upper PTFE plate are also under pressure, causing the connecting column to move downwards and the spring to compress. This reduces the longitudinal pressure on the rubber pad and spring, thereby achieving a shock-absorbing and pressure-resistant effect, solving the problems of short service life and inability to reduce shock and pressure in bridge bearings.

[0004] In the process of installing bearings on roads and bridges, the existing seismic bearings on the market mainly rely on the elastic deformation of the material itself to resist seismic forces. However, in actual seismic testing, because the bearings absorb energy in a relatively simple way, they cannot effectively absorb the seismic force they receive, which may result in the bearings being unable to withstand the force generated by the vibration. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies that rely primarily on the elastic deformation of the material itself for resistance. However, in actual earthquake resistance, the energy absorption method of the bearing is relatively simple, which cannot effectively absorb the seismic force received by the bearing, making it unable to withstand the force generated by the vibration. Therefore, this invention proposes a seismic bearing for road bridges.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a road and bridge seismic support, comprising a lower steel plate, an upper steel plate, and a damping component. The upper steel plate is slidably connected above the lower steel plate. The damping component is disposed on the lower surface of the upper steel plate and on the upper surface of the lower steel plate. The damping component includes a first damping block. The first damping block is fixedly connected to the upper surface of the lower steel plate. A first limiting rod is fixedly connected to the side surface of the first damping block. A first deceleration spring is fixedly connected to one side of the first damping block. A first linkage frame is fixedly connected to the free end of the first deceleration spring. A circular hole is formed on the upper surface of the first linkage frame, and the first linkage frame rotates about the inner wall of the circular hole. A first connecting arm is connected to the upper steel plate. A second damping block is fixedly connected to the lower surface of the upper steel plate. A second limiting rod is fixedly connected to one side of the second damping block. A second deceleration spring is fixedly connected to the side surface of the second limiting rod. A second linkage frame is fixedly connected to the free end of the second deceleration spring. A second connecting arm is rotatably connected to the lower surface of the second linkage frame. A damping column is fixedly connected to the center of the lower surface of the upper steel plate. A mounting block is fixedly connected to the side of the damping column away from the upper steel plate. A connecting frame is fixedly connected to the side surface of the mounting block. A rotating hole is opened on the surface of the connecting frame. A first connecting arm is rotatably connected to the connecting frame about the inner wall of the rotating hole. A second connecting arm is rotatably connected to the connecting frame about the inner wall of the rotating hole.

[0007] Preferably, the first damping block is in contact with the surface of the first linkage frame. There are two first damping blocks, which are arranged symmetrically about the first limiting rod. The position of the first limiting rod can be positioned by the first damping block. At the same time, the vibration force of the first linkage frame contacting the first damping block when the first deceleration spring rebounds is absorbed to avoid transmitting the rebound force to the lower steel plate.

[0008] Preferably, the first limiting rod passes through the first linkage frame, and there are four first limiting rods arranged in a circumferential array about the damping column. Through the first limiting rods, when the upper steel plate moves downward, the position of the first linkage frame can be moved to ensure that the deceleration spring absorbs the vibration force while decelerating.

[0009] Preferably, the surfaces of the first connecting arm and the second connecting arm are in contact. The surface of the first connecting arm is provided with a square groove. Both ends of the first connecting arm are arc-shaped. There are four first connecting arms. The four first connecting arms are arranged in a circumferential array about the damping column. Through the cooperation of the first connecting arm and the second connecting arm, the vibration force on the upper steel plate can be partially absorbed.

[0010] Preferably, the lower surface of the lower steel plate is provided with an assisting component, which includes a base. The base is fixedly connected to the lower surface of the lower steel plate. An installation groove is formed on the upper surface of the base. A shaft is fixedly connected to the inner wall of the installation groove. A damping sleeve is fixedly connected to the center of the shaft. A buffer spring is fixedly connected to the side surface of the damping sleeve. The side of the buffer spring away from the damping sleeve is fixedly connected to the base. An assembly frame is fixedly connected to the outer surface of the damping sleeve. A through hole is formed on the upper surface of the assembly frame. A linkage arm is rotatably connected to the inner wall of the through hole about the assembly frame. A mounting frame is fixedly connected to the outer arc surface of the upper steel plate. A limit hole is formed on the surface of the mounting frame. A linkage arm is rotatably connected to the inner wall of the limit hole about the mounting frame. The position of the shaft can be restricted and the position of the buffer spring can be positioned through the installation groove.

[0011] Preferably, there are two buffer springs, which are arranged symmetrically about the damping sleeve. Both buffer springs are in the reset state at this time. The buffer springs can buffer the speed of movement of the damping sleeve to ensure that the force transmitted from the upper steel plate can be partially absorbed.

[0012] Preferably, both ends of the linkage arm are arc-shaped, and there are four linkage arms arranged in a circumferential array about the lower steel plate. The position of the assembly frame can be moved through the linkage arms to achieve the function of a buffer sleeve.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, by setting up a shock-absorbing component, when the upper steel plate is vibrated and slides downward, the force is first transmitted to the damping column. Then, the damping column is compressed by the force, absorbing a small portion of the force, and then the remaining force is transmitted to the mounting block. The mounting block then moves downward under the force, and through the first and second connecting arms, it is spread out to both ends, thereby driving the first and second linkage frames to move. The movement then compresses the first and second deceleration springs, causing them to deform and absorbing part of the force applied to the mounting block. At the same time, as the mounting block moves downward, it also drives the upper steel plate to move downward, thereby reducing the force borne by the lower steel plate. By setting up the shock-absorbing component, seismic energy can be absorbed more effectively when roads or bridges vibrate, thereby greatly enhancing the earthquake absorption capacity of the support system, reducing the seismic force transmitted to the main structure of the bridge, and further improving the ability to absorb seismic energy.

[0015] 2. In this utility model, by setting an assisting component, while the shock-absorbing component absorbs the vibration force of the upper steel plate, the upper steel plate moves downward, which in turn drives the linkage arm to expand outward. As the linkage arm expands, it absorbs another part of the vibration force through the assembly frame and the damping sleeve. Then, as the linkage arm expands, the damping sleeve moves and squeezes the buffer spring on the outer side. The buffer spring is squeezed and deformed, which in turn drives the buffer spring on the other end to stretch, thereby absorbing the remaining vibration force and rebounding to reset. In this way, the force borne by the upper steel plate can be absorbed. By setting an assisting component, the remaining vibration force transmitted by the upper steel plate can be absorbed while the upper steel plate rebounds up and down, thereby achieving the goal of transmitting the minimum vibration force to the upper part of the lower steel plate, and further improving the stability of the building above the upper steel plate. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of a road and bridge seismic bearing is provided for this utility model;

[0017] Figure 2 This utility model provides a cross-sectional structural schematic diagram of a road and bridge seismic bearing;

[0018] Figure 3 This utility model provides a schematic diagram of a shock-absorbing component structure for a road and bridge seismic bearing.

[0019] Figure 4 This utility model provides a partial structural schematic diagram of a shock-absorbing component for a road and bridge seismic bearing.

[0020] Figure 5 This utility model provides a schematic diagram of the auxiliary component structure for a road and bridge seismic bearing.

[0021] Figure 6This utility model presents a partial structural schematic diagram of an assisting component for road and bridge seismic bearings.

[0022] Legend:

[0023] 1. Lower steel plate; 2. Upper steel plate; 3. Vibration damping assembly; 31. First damping block; 32. First limit rod; 33. First deceleration spring; 34. First linkage frame; 35. First connecting arm; 36. Second damping block; 37. Second limit rod; 38. Second deceleration spring; 39. Second linkage frame; 310. Second connecting arm; 311. Damping column; 312. Mounting block; 313. Connecting frame; 4. Assisting assembly; 41. Base; 42. Mounting slot; 43. Shaft; 44. Buffer spring; 45. Damping sleeve; 46. Assembly frame; 47. Linkage arm; 48. Mounting frame. Detailed Implementation

[0024] Please see Figures 1-6 This utility model provides a technical solution: a road bridge seismic support, including a lower steel plate 1, an upper steel plate 2 and a shock-absorbing component 3. The upper steel plate 2 is slidably connected above the lower steel plate 1. The shock-absorbing component 3 is disposed on the lower surface of the upper steel plate 2 and on the upper surface of the lower steel plate 1.

[0025] The following section will explain the specific settings and functions of its shock absorption component 3 and assist component 4.

[0026] In this embodiment: the shock absorption assembly 3 includes a first damping block 31. The first damping block 31 is fixedly connected to the upper surface of the lower steel plate 1. A first limiting rod 32 is fixedly connected to the side surface of the first damping block 31. A first deceleration spring 33 is fixedly connected to one side of the first damping block 31. A first linkage frame 34 is fixedly connected to the free end of the first deceleration spring 33. A circular hole is opened on the upper surface of the first linkage frame 34. A first connecting arm 35 is rotatably connected to the inner wall of the circular hole of the first linkage frame 34. A second damping block 36 is fixedly connected to the lower surface of the upper steel plate 2. A second limiting rod 37 is fixedly connected to one side of the second damping block 36. A second deceleration spring 38 is fixedly connected to the side surface of rod 37. A second linkage frame 39 is fixedly connected to the free end of the second deceleration spring 38. A second connecting arm 310 is rotatably connected to the lower surface of the second linkage frame 39. A damping column 311 is fixedly connected to the center of the lower surface of the upper steel plate 2. A mounting block 312 is fixedly connected to the side of the damping column 311 away from the upper steel plate 2. A connecting frame 313 is fixedly connected to the side surface of the mounting block 312. A rotating hole is opened on the surface of the connecting frame 313. A first connecting arm 35 is rotatably connected to the inner wall of the rotating hole about the connecting frame 313. A second connecting arm 310 is rotatably connected to the inner wall of the rotating hole about the connecting frame 313.

[0027] Specifically, the first damping block 31 is in contact with the surface of the first linkage frame 34. There are two first damping blocks 31, and the two first damping blocks 31 are arranged symmetrically about the first limit rod 32.

[0028] The effect achieved by the above components is as follows: the position of the first limiting rod 32 can be positioned by the first damping block 31, and the vibration force of the first linkage frame 34 contacting the first damping block 31 when the first deceleration spring 33 rebounds is absorbed to avoid the rebound force being transmitted to the lower steel plate 1.

[0029] Specifically, the first limiting rod 32 passes through the first linkage frame 34, and there are four first limiting rods 32 arranged in a circular array about the damping column 311.

[0030] The effect achieved by the above components is that, through the first limiting rod 32, when the upper steel plate 2 moves downward, the position of the first linkage frame 34 can be moved to ensure that the deceleration spring absorbs the vibration force while decelerating.

[0031] Specifically, the surfaces of the first connecting arm 35 and the second connecting arm 310 are in contact. The surface of the first connecting arm 35 is provided with a square groove. Both ends of the first connecting arm 35 are arc-shaped. There are four first connecting arms 35, and the four first connecting arms 35 are arranged in a circular array about the damping column 311.

[0032] The effect achieved by the above components is that, through the cooperation of the first connecting arm 35 and the second connecting arm 310, the vibration force on the upper steel plate 2 can be partially absorbed.

[0033] Specifically, an assisting component 4 is provided on the lower surface of the lower steel plate 1. The assisting component 4 includes a base 41. The base 41 is fixedly connected to the lower surface of the lower steel plate 1. An installation groove 42 is opened on the upper surface of the base 41. A shaft 43 is fixedly connected to the inner wall of the installation groove 42. A damping sleeve 45 is fixedly connected to the center of the shaft 43. A buffer spring 44 is fixedly connected to the side surface of the damping sleeve 45. The side of the buffer spring 44 away from the damping sleeve 45 is fixedly connected to the base 41. An assembly frame 46 is fixedly connected to the outer surface of the damping sleeve 45. A through hole is opened on the upper surface of the assembly frame 46. A linkage arm 47 is rotatably connected to the inner wall of the assembly frame 46 about the through hole. An installation frame 48 is fixedly connected to the outer arc surface of the upper steel plate 2. A limit hole is opened on the surface of the installation frame 48. A linkage arm 47 is rotatably connected to the inner wall of the installation frame 48 about the limit hole.

[0034] The effect achieved by the above components is that the position of the shaft 43 can be restricted by the mounting groove 42, and the position of the buffer spring 44 can be positioned.

[0035] Specifically, there are two buffer springs 44, which are arranged symmetrically about the damping sleeve 45. Both buffer springs 44 are in the reset state at this time.

[0036] The effect achieved by the above components is that the speed of movement of the damping sleeve 45 can be buffered by the buffer spring 44, so as to ensure that the force transmitted by the upper steel plate 2 can be partially absorbed.

[0037] Specifically, both ends of the linkage arm 47 are arc-shaped, and there are four linkage arms 47 arranged in a circular array about the lower steel plate 1.

[0038] The effect achieved by the above components is that the position of the assembly frame 46 can be moved through the linkage arm 47 to realize the function of the buffer sleeve.

[0039] Working principle: When the upper steel plate 2 is vibrated and slides downward, the force is first transmitted to the damping column 311. The damping column 311 is then compressed, absorbing a small portion of the force, and the remaining force is transmitted to the mounting block 312. The mounting block 312 then moves downward and is spread outward through the first connecting arm 35 and the second connecting arm 310. This causes the first linkage frame 34 and the second linkage frame 39 to move, which in turn compresses the first deceleration spring 33 and the second deceleration spring 38. The first deceleration spring 33 and the second deceleration spring 38 are deformed by the compression, thereby absorbing part of the force applied to the mounting block 312. At the same time, as the mounting block 312 moves downward, it also causes the upper steel plate 2 to move downward, thereby reducing the force on the lower steel plate 1. By setting the shock absorption component 3, the seismic energy can be absorbed more effectively when the road or bridge vibrates, which greatly enhances the earthquake absorption capacity of the support system, reduces the seismic force transmitted to the main structure of the bridge, and further improves the ability to absorb earthquake energy.

[0040] In addition, by setting the assist component 4, while the shock absorption component 3 absorbs the vibration force of the upper steel plate 2, the upper steel plate 2 moves downward, which in turn drives the linkage arm 47 to expand outward. As the linkage arm 47 expands, it absorbs another part of the vibration force through the assembly frame 46 and the damping sleeve 45. As the linkage arm expands, the damping sleeve 45 moves and compresses the outer buffer spring 44. The buffer spring 44 is compressed and deformed, which in turn drives the other end of the buffer spring 44 to stretch, thereby absorbing the remaining vibration force and rebounding to reset. In this way, the force borne by the upper steel plate 2 can be absorbed. By setting the assist component 4, the remaining vibration force transmitted by the upper steel plate 2 can be absorbed while the upper steel plate 2 rebounds up and down, thereby achieving the goal of transmitting the minimum vibration force to the upper part of the lower steel plate 1, and further improving the stability of the building above the upper steel plate 2.

Claims

1. A road bridge anti-seismic support, comprising a lower steel plate (1), an upper steel plate (2) and a damping assembly (3), characterized in that: The lower steel plate (1) is slidably connected with an upper steel plate (2), the damping assembly (3) is arranged on the lower surface of the upper steel plate (2), the damping assembly (3) is arranged on the upper surface of the lower steel plate (1), the damping assembly (3) comprises a first damping block (31), the upper surface of the lower steel plate (1) is fixedly connected with the first damping block (31), the side surface of the first damping block (31) is fixedly connected with a first limiting rod (32), one side of the first damping block (31) is fixedly connected with a first deceleration spring (33), the free end of the first deceleration spring (33) is fixedly connected with a first linkage frame (34), the upper surface of the first linkage frame (34) is provided with a circular hole, the first linkage frame (34) is rotatably connected with a first connecting arm (35) about the inner wall of the circular hole, the lower surface of the upper steel plate (2) is fixedly connected with a second damping block (36), one side of the second damping block (36) is fixedly connected with a second limiting rod (37), the side surface of the second limiting rod (37) is fixedly connected with a second deceleration spring (38), the free end of the second deceleration spring (38) is fixedly connected with a second linkage frame (39), the lower surface of the second linkage frame (39) is rotatably connected with a second connecting arm (310), the center of the lower surface of the upper steel plate (2) is fixedly connected with a damping column (311), the side away from the upper steel plate (2) of the damping column (311) is fixedly connected with a mounting block (312), the side surface of the mounting block (312) is fixedly connected with a connecting frame (313), the surface of the connecting frame (313) is provided with a rotating hole, the connecting frame (313) is rotatably connected with the first connecting arm (35) about the inner wall of the rotating hole, and the connecting frame (313) is rotatably connected with the second connecting arm (310) about the inner wall of the rotating hole.

2. The anti-seismic support for road and bridge according to claim 1, characterized in that: The first damping block (31) is in contact with the surface of the first linkage frame (34), the number of the first damping block (31) is two, and the two first damping blocks (31) are symmetrically arranged about the first limiting rod (32).

3. The anti-seismic support for road and bridge according to claim 1, characterized in that: The first limiting rod (32) penetrates through the first linkage frame (34), the number of the first limiting rod (32) is four, and the four first limiting rods (32) are circumferentially arranged about the damping column (311).

4. The anti-seismic support for road and bridge according to claim 1, characterized in that: The surface of the first connecting arm (35) is in contact with the surface of the second connecting arm (310), the surface of the first connecting arm (35) is provided with a square groove, both ends of the first connecting arm (35) are arranged in an arc shape, the number of the first connecting arm (35) is four, and the four first connecting arms (35) are circumferentially arranged about the damping column (311).

5. The anti-seismic support for road and bridge according to claim 1, characterized in that: The lower surface of the lower steel plate (1) is provided with an assisting assembly (4), the assisting assembly (4) comprises a base (41), the lower surface of the lower steel plate (1) is fixedly connected with the base (41), the upper surface of the base (41) is provided with a mounting groove (42), the inner wall of the mounting groove (42) is fixedly connected with a shaft rod (43), the center of the shaft rod (43) is fixedly connected with a damping sleeve (45), the side surface of the damping sleeve (45) is fixedly connected with a buffer spring (44), the side of the buffer spring (44) away from the damping sleeve (45) is fixedly connected with the base (41), the outer surface of the damping sleeve (45) is fixedly connected with an assembling frame (46), the upper surface of the assembling frame (46) is provided with a through hole, the assembling frame (46) is rotatably connected with a linkage arm (47) about the inner wall of the through hole, the outer arc surface of the upper steel plate (2) is fixedly connected with a mounting frame (48), the surface of the mounting frame (48) is provided with a limiting hole, the mounting frame (48) is rotatably connected with the linkage arm (47) about the inner wall of the limiting hole.

6. The anti-seismic support for road and bridge according to claim 5, characterized in that: The number of the buffer springs (44) is two, the two buffer springs (44) are symmetrically arranged about the damping sleeve (45), and the two buffer springs (44) are in a reset state at this time.

7. The anti-seismic support for road and bridge according to claim 5, characterized in that: The two ends of the linkage arm (47) are arc-shaped, the number of the linkage arms (47) is four, and the four linkage arms (47) are circumferentially arranged about the lower steel plate (1).

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