A self-resetting shear-resistant seismic isolation bearing

Abstract

The present invention discloses a self-resetting shear-resistant seismic isolation bearing, which belongs to the technical field of bridge vibration isolation bearings and includes: an upper bearing, a lower bearing, and a rubber bearing installed between the upper bearing and the lower bearing. The rubber bearing is slidably connected to the upper bearing, and the rubber bearing is composed of a plurality of rubber bearing assemblies stacked together. The rubber bearing assembly includes two symmetrically arranged support plates and a rubber interlayer installed between the two support plates. A first groove is provided on the side where the two support plates are close to each other, and an energy-absorbing damping steel plate with a U-shaped cross-section is installed in the first groove. An installation area for installing the rubber interlayer is formed between the two symmetrical energy-absorbing damping steel plates. A crescent-shaped gap is provided between the energy-absorbing damping steel plate and the inner wall of the first groove, and an elastic member connected to both the first groove and the energy-absorbing damping steel plate is installed in the gap. By arranging the U-shaped energy-absorbing damping steel plate and cooperating with the gap, the reset ability of the seismic isolation bearing after being subjected to shear force is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge vibration isolation bearings, and in particular relates to a self-resetting shear-resistant vibration isolation bearing. Background Art

[0002] The bridge bearing is located between the bridge and the pedestal. It can transfer the load and deformation borne by the bridge superstructure to the bridge substructure. It is an important force transmission device of the bridge. The bridge bearing is generally composed of an upper seat plate, a lower seat plate and a rubber plate between the two plates. The rubber plate plays a certain buffering role and has good elasticity to adapt to the rotation of the beam end.

[0003] In actual engineering, the most commonly used vibration isolation technology is rubber bearings. While they can effectively reduce the impact of vibration and earthquakes on bridges, they are often unable to withstand large amounts of shear forces. Prior art, such as the one disclosed in Publication No. CN219099791U, discloses a shear-resistant bridge bearing. This bearing has first and second limiting grooves on the upper and lower seat plates, respectively. When the limiting grooves mate with limiting protrusions, they hinder the misalignment of the rubber plate and resist shear forces. While this bearing can withstand shear forces, it suffers from poor resetting performance when subjected to large shear forces.

[0004] Therefore, it is necessary to propose a self-resetting shear-resistant isolation bearing to solve the above problems. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a self-resetting shear-resistant seismic isolation bearing, which is used to solve the problem in the prior art that the bearing has poor reset performance when the bearing is subjected to a large shear force.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a self-resetting shear-resistant seismic isolation bearing, comprising: an upper bearing, a lower bearing, and a rubber bearing installed between the upper bearing and the lower bearing, the rubber bearing being slidably connected to the upper bearing, the rubber bearing being stacked together by a plurality of rubber bearing assemblies, the rubber bearing assembly comprising two symmetrically arranged support plates and a rubber barrier installed between the two support plates, a first groove being provided on the side where the two support plates are close to each other, an energy-absorbing and damping steel plate with a U-shaped cross-section being installed in the first groove, an installation area for installing the rubber barrier being formed between the two symmetrical energy-absorbing and damping steel plates, a crescent-shaped gap being provided between the energy-absorbing and damping steel plate and the inner wall of the first groove, the energy-absorbing and damping steel plate being able to deform along the gap, an elastic member connected to both the first groove and the energy-absorbing and damping steel plate being installed in the gap.

[0008] Furthermore, the upper support is provided with a plurality of first strip grooves in a circumferential direction with the axis direction of the rubber support as the center, a first slider is slidably installed in the first strip groove, a limit plate is rotatably installed on the first slider, the rubber support is installed between the plurality of limit plates, and a first spring is installed between the opposite side walls of the first slider and the inner wall corresponding to the first strip groove, a circular support seat is installed on the lower support, a first gap is provided between the top of the support seat and the upper support, and a viscous damper is connected to the ball joint damping between the support seat and the limit plate.

[0009] Furthermore, a limiting groove is provided on the limiting plate, and a mounting block is slidingly connected in the limiting groove. The first end of the viscous damper is connected to the mounting block by a ball hinge damping, and the second end of the viscous damper is connected to the inner wall of the support seat by a ball hinge damping.

[0010] Furthermore, the lower support is provided with a second strip groove corresponding to the limit plate one by one, and a second slider is installed in the second strip groove for limiting sliding. The limit plate is rotatably connected to the second slider away from the end of the first slider, and a second gap is provided between the bottom end of the limit plate and the bottom wall of the second strip groove.

[0011] Furthermore, a strip hole is provided on the second slider, and a fixing rod passing through the strip hole is installed in the second strip groove. The second slider can slide along the axial direction of the fixing rod, and the fixing rod is slidably connected to the strip hole. Abutment blocks are slidably installed on both sides of the fixing rod opposite to the second slider, and a second spring is installed between the abutment block and the inner wall of the second strip groove, and the abutment block abuts against the limit plate through the second spring.

[0012] Furthermore, the support seat is provided with threaded holes corresponding to the mounting blocks one by one, the threaded holes are internally threadedly connected with mounting seats, and the mounting seats are connected to the viscous damper ball joint damping.

[0013] The beneficial effects of the present invention are:

[0014] The present invention sets a U-shaped energy-absorbing and damping steel plate so that the energy-absorbing and damping steel plates on both sides play a role in limiting the rubber interlayer to resist the shear force exerted on the rubber interlayer. When the seismic isolation support is subjected to vibration, the rubber support produces longitudinal displacement. When the rubber support is longitudinally compressed, the support plate longitudinally compresses the rubber interlayer. In this process, the energy-absorbing and damping steel plate plays an energy-absorbing role. The energy-absorbing and damping steel plate deforms along the crescent-shaped gap, so that the curvature of the arc section of the energy-absorbing and damping steel plate becomes larger, further preventing the rubber interlayer from being dislocated under the action of shear force. An elastic part is provided in the crescent-shaped gap. The elastic part can enhance the resetting performance of the energy-absorbing and damping steel plate, so that the rubber support is reset when longitudinal displacement occurs. At the same time, the elastic part further improves the buffering capacity of the rubber support, thereby improving the shock absorption capacity and toughness of the seismic isolation support.

[0015] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0017] Figure 1 Schematic diagram of the overall structure cross-section of an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the installation of a limit plate according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the installation of the second slider according to an embodiment of the present invention;

[0020] Figure 4 This is a cross-sectional view of a rubber bearing according to an embodiment of the present invention.

[0021] The markings in the accompanying drawings are as follows: upper support 1, first strip groove 101, limiting plate 102, first spring 103, limiting groove 104, strip hole 105, first slider 106, lower support 2, support seat 201, first gap 202, second strip groove 203, second gap 204, fixing rod 205, abutment block 206, second spring 207, second slider 208, rubber support assembly 3, support plate 301, rubber interlayer 302, first groove 303, energy dissipation damping steel plate 304, gap 305, elastic member 306, viscous damper 4, mounting block 5, mounting seat 6. DETAILED DESCRIPTION

[0022] like Figures 1 to 4As shown, the present invention provides a self-resetting shear-resistant seismic isolation bearing, which includes: an upper bearing 1, a lower bearing 2, and a rubber bearing installed between the upper bearing 1 and the lower bearing 2, the rubber bearing being slidably connected to the upper bearing 1, and the rubber bearing being formed by stacking a plurality of rubber bearing assemblies 3, the rubber bearing assembly 3 including two symmetrically arranged support plates 301 and a rubber interlayer 302 installed between the two support plates 301, a first groove 303 is provided on the side where the two support plates 301 are close to each other, an energy-absorbing and damping steel plate 304 with a U-shaped cross-section is installed in the first groove 303, an installation area for installing the rubber interlayer 302 is formed between the two energy-absorbing and damping steel plates 304, a crescent-shaped gap 305 is provided between the energy-absorbing and damping steel plate 304 and the inner wall of the first groove 303, and an elastic member 306 is installed in the gap 305.

[0023] In this solution, by setting up U-shaped energy-dissipating damping steel plates 304, the energy-dissipating damping steel plates 304 on both sides play a role in limiting the rubber interlayer 302 to resist the shear force on the rubber interlayer 302. When the seismic isolation support is vibrated, the rubber support produces longitudinal displacement. When the rubber support is longitudinally compressed, the support plate 301 longitudinally compresses the rubber interlayer 302. In this process, the energy-dissipating damping steel plates 304 play an energy-dissipating role. The energy-dissipating damping steel plates 304 deform along the crescent-shaped gap 305, so that the arc section of the energy-dissipating damping steel plates 304 The curvature becomes larger, and the energy-absorbing and damping steel plate 304 has the ability to reset after deformation, further preventing the rubber interlayer 302 from being dislocated under the action of shear force, and an elastic member 306 is provided in the crescent-shaped gap 305. The elastic member 306 includes but is not limited to a spring and an elastic pad. The elastic member 306 can enhance the reset performance of the energy-absorbing and damping steel plate 304, so that the rubber bearing can be reset when longitudinal displacement occurs. At the same time, the elastic member 306 further improves the buffering capacity of the rubber bearing, thereby improving the shock absorption capacity and toughness of the seismic isolation bearing.

[0024] In one embodiment of the present invention, the upper support 1 is circumferentially provided with a plurality of first strip grooves 101 centered on the axial direction of the rubber support, a first slider 106 is slidably installed in the first strip groove 101, a limit plate 102 is rotatably installed on the first slider 106, the rubber support is installed between the plurality of limit plates 102, and first springs 103 are installed between the opposite side walls of the first slider 106 and the corresponding inner walls of the first strip groove 101, a circular support seat 201 is installed on the lower support 2, a first gap 202 is provided between the top of the support seat 201 and the upper support 1, and a viscous damper 4 is connected to the ball joint damping between the support seat 201 and the limit plate 102.

[0025] In this solution, when the rubber bearing vibrates, the rubber bearing is subjected to shear force, causing the rubber bearing and the upper bearing 1 to slide, thereby causing the limit plate 102 to slide. During the sliding process, the limit plate 102 rotates to adapt to the outer peripheral wall of the rubber bearing. During the sliding process of the limit plate 102, the shear force exerted on the rubber bearing is resisted by the first spring 103 and the viscous damper 4, and the rubber bearing is easily reset; and by arranging multiple limit plates 102 circumferentially on the outer peripheral wall of the rubber bearing, the shear force exerted on the rubber bearing in any radial direction can be resisted; the viscous damper 4 is connected between the support seat 201 and the limit plate 102 with a ball joint damping, so that when the rubber bearing is subjected to shear force and produces lateral displacement, the viscous damper 4 whose displacement direction of the rubber bearing is not in the same straight line is avoided from breaking.

[0026] In one embodiment of the present invention, a limiting groove 104 is provided on the limiting plate 102, and a mounting block 5 is slidingly connected in the limiting groove 104. The first end of the viscous damper 4 is connected to the mounting block 5 by a ball joint damping, and the second end of the viscous damper 4 is connected to the inner wall of the support seat 201 by a ball joint damping.

[0027] In this solution, the rubber bearing is subjected to shear force during vibration, and the rubber bearing will produce longitudinal displacement during vibration, thereby causing the upper bearing 1 and the limit plate 102 to produce longitudinal displacement. When the limit plate 102 is longitudinally displaced, the mounting block 5 can slide along the limit groove 104, so that the axial direction of the viscous damper 4 is consistent with the shear force direction of the rubber bearing, thereby avoiding the movement of the limit plate 102 causing the viscous damper 4 to tilt, affecting the viscous damper 4's counteracting effect on the shear force exerted on the rubber bearing; at the same time, by setting the viscous damper 4 to be connected with the mounting block 5, the installation and disassembly of the viscous damper 4 is facilitated, and the viscous damper 4 is avoided from being directly installed on the limit plate 102. In this way, when the viscous damper 4 is damaged, it will be replaced together with the limit plate 102, increasing the maintenance cost.

[0028] In one embodiment of the present invention, the lower support 2 is provided with a second strip groove 203 corresponding one-to-one to the limit plate 102, and a second slider 208 is installed in the second strip groove 203 for limiting sliding. The limit plate 102 is rotatably connected to the second slider 208 at the end away from the first slider 106, and a second gap 204 is provided between the bottom end of the second slider 208 and the bottom wall of the second strip groove 203.

[0029] In this solution, by setting the second strip groove 203, the limit plate 102 is slidably installed in the first strip groove 101 and the second strip groove 203, thereby ensuring the sliding stability of the limit plate 102; a second gap 204 is provided between the bottom end of the second slider 208 and the bottom wall of the second strip groove 203, so that the limit plate 102 can produce longitudinal displacement.

[0030] In one embodiment of the present invention, a strip hole 105 is provided on the second slider 208, and a fixing rod 205 passing through the strip hole 105 is installed in the second strip groove 203. The second slider 208 can slide along the axial direction of the fixing rod 205, and the fixing rod 205 is slidably connected to the strip hole 105. Abutment blocks 206 are slidably installed on both sides of the fixing rod 205 opposite to the second slider 208, and a second spring 207 is installed between the abutment block 206 and the inner wall of the second strip groove 203.

[0031] In this solution, when the rubber bearing is subjected to shear force and is displaced laterally, the second slider 208 slides along the first strip groove 101 and the second strip groove 203, so that the limit plate 102 can slide along the axial direction of the fixed rod 205. When the rubber bearing is vibrated and the upper bearing 1 and the limit plate 102 are displaced longitudinally, the limit plate 102 moves along the radial direction of the fixed rod 205 through the strip hole 105. The abutment blocks 206 on both sides abut against the two sides of the second slider 208 under the action of the second spring 207. The second spring 207 further enhances the buffering effect of the limit plate 102 during the movement, and ensures the stability of the top and bottom ends of the limit plate 102 under the action of the first spring 103 and the second spring 207 respectively.

[0032] In one embodiment of the present invention, the support seat 201 is provided with threaded holes corresponding to the mounting blocks 5 , the threaded holes are internally threadedly connected with mounting seats 6 , and the mounting seats 6 are connected to the viscous damper 4 via a ball joint damping connection.

[0033] In this solution, by providing the mounting seat 6 , the mounting seat 6 is detachably connected to the support seat 201 by thread, which facilitates the installation and removal of the viscous damper 4 .

[0034] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A self-resetting, shear-resistant, seismic isolation support comprising: The upper support, the lower support and the rubber support installed between the upper support and the lower support are characterized in that: the rubber support is slidably connected to the upper support, the rubber support is stacked into one by a plurality of rubber support assemblies, the rubber support assembly includes two symmetrically arranged support plates and a rubber barrier installed between the two support plates, a first groove is provided on the side close to the two support plates, an energy-absorbing damping steel plate with a U-shaped cross-section is installed in the first groove, and an installation area for installing the rubber barrier is formed between the two symmetrical energy-absorbing damping steel plates, a crescent-shaped gap is provided between the energy-absorbing damping steel plate and the inner wall of the first groove, the energy-absorbing damping steel plate can be deformed along the gap, and an elastic member connected to the first groove and the energy-absorbing damping steel plate is installed in the gap; the upper support is circumferentially provided with a plurality of first strip grooves centered on the axis direction of the rubber support, a first slider is slidably installed in the first strip groove, a limit plate is rotatably installed on the first slider, the rubber support is installed between the plurality of limit plates, and a first spring is installed between the opposite side walls of the first slider and the inner wall corresponding to the first strip groove, the The cam is provided with a first sliding member connected to the support frame, and the second sliding member is connected to the support frame by a cam. The plate is rotatably connected to the second slider away from the first slider end, and a second gap is provided between the bottom end of the limit plate and the bottom wall of the second strip groove; a strip hole is provided on the second slider, and a fixing rod passing through the strip hole is installed in the second strip groove, and the second slider can slide along the axis direction of the fixing rod, and the fixing rod is slidably connected to the strip hole, and abutment blocks are slidably installed on both sides of the fixing rod opposite to the second slider, and a second spring is installed between the abutment block and the inner wall of the second strip groove, and the abutment block abuts against the limit plate through the second spring.

2. The self-resetting shear-resistant isolation bearing according to claim 1, characterized in that: The support seat is provided with threaded holes corresponding to the mounting blocks one by one, the threaded holes are internally threadedly connected with mounting seats, and the mounting seats are connected to the viscous damper ball joint damping.

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