A self-locking, resettable, energy-consuming, multi-directional limited bridge seismic device

Abstract

The present invention discloses a self-locking type resettable energy-consuming multi-directional limit bridge anti-seismic device, comprising a steel bracket, a friction limit top plate, a transmission limit steel column, a transmission slider, a friction limit slider, a bracket block, a transmission plate, a first steel spring and a second steel spring; the steel bracket is fixed to the side wall of the bridge pier by bolts; the friction limit top plate is fixed to the bottom of the bridge main beam by bolts, one end of the transmission limit steel column is connected to the bottom of the friction limit top plate by a ball joint support, and the other end is connected to the first protruding block of the transmission slider by a ball joint support; the transmission slider is connected to the bottom of the bracket block by a first steel spring; the friction limit slider is connected to the upper part of the bracket block by the first steel spring; the two ends of the transmission plate are fixedly connected to the second steel spring and connected to the bracket block by a hinge support. The present invention can achieve a good self-locking effect while limiting the bridge, the overall energy consumption and shock absorption effect of the device is good, the structure is simple and reasonable, and it is easy to make.

Description

Technical Field

[0001] The invention relates to the technical field of bridge earthquake resistance, in particular to a self-locking, resettable, energy-consuming, multi-directional limiting bridge earthquake resistance device. Background Art

[0002] With the rapid development of my country's economy and science and technology, economic development has driven the rapid development of infrastructure, and more and more roads and bridges are being built. The bridges themselves have large spans and high heights. Most of the bridges in service in my country will have certain longitudinal and lateral displacements under various dynamic effects such as earthquakes and vehicle-ship collisions. In addition, they will also have displacements in any direction under static effects such as expansion joint jamming and temperature effects. These bridges with beam displacement have seriously threatened the safety of road operations. Therefore, it is very necessary to take earthquake-resistant measures for bridges.

[0003] At present, in order to limit the relatively large displacement between the upper beams, a common practice is to set a block on the top of the bridge beam, but this may cause greater stress in the beam, causing damage to the bottom of the beam, the top of the pier or the top of the cap beam, and cannot effectively limit the displacement of the beam. Secondly, the earthquake energy is consumed by the deformation of the block, and the earthquake energy consumed is low, and it is not easy to recover after deformation. Furthermore, the current bridge seismic limit device can only achieve limitation in one direction, and cannot achieve limitation in any direction.

[0004] In view of the above shortcomings, it is necessary to design and develop a new type of bridge seismic limit device that can better realize the constraint of the bridge beam in any direction, limit the displacement of the beam in multiple directions, release and dissipate the constraint stress, buffer the impact force and consume seismic energy. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the present invention designs and develops a self-locking, resettable, energy-absorbing, multi-directional limiting bridge seismic device, which can limit the displacement of the bridge body in multiple directions, effectively preventing the bridge body from falling off due to the influence of earthquakes; it can achieve the effects of buffering and resetting, and prevent damage caused by collisions; further, it can limit the displacement of the bridge body by borrowing the displacement of the bridge body, achieve the effect of self-locking, effectively limit the displacement of the bridge body and consume seismic energy; at the same time, while achieving the self-locking effect, it can convert the displacement energy of the bridge body into the form of collision, friction and spring energy to consume it, and further realize the dissipation of seismic energy.

[0006] To achieve the above purpose, the technical solution used in the present invention is:

[0007] A self-locking and resetable energy-dissipating multi-directional seismic isolation device for bridges, comprising a steel bracket, a friction-limiting top plate, a transmission-limiting steel column, a transmission slider, a friction-limiting slider, a support stop block, a transmission plate, a first steel spring and a second steel spring; the steel bracket is fixed on the side wall of the pier by bolts; the friction-limiting top plate is fixed on the bottom of the bridge girder by bolts, one end of the transmission-limiting steel column is connected to the bottom of the friction-limiting top plate through a spherical hinge support, and the other end is connected to the first protruding block of the transmission slider through a spherical hinge support; the support stop block is fixedly connected to the steel bracket platform, and the transmission slider is connected to the bottom of the support stop block through the first steel spring; the friction-limiting slider is connected to the upper part of the support stop block through the first steel spring; both ends of the transmission plate are fixedly connected with the second steel spring and are connected to the support stop block through a hinge support.

[0008] The friction-limiting top plate is composed of a square-ring-shaped limiting block and a bottom plate. A square groove is arranged inside the square-ring-shaped limiting block, and the inner wall of the square groove is an inclined plane.

[0009] The friction-limiting slider is composed of a lower-layer square slider and an upper-layer quadrangular pyramid slider. Friction layers are arranged on the top and four sides of the upper-layer quadrangular pyramid slider.

[0010] The support stop block is composed of an upper baffle, a lower baffle and a middle plate. One upper baffle is respectively arranged at both ends of the middle plate in the longitudinal direction of the bridge, and one upper baffle is respectively arranged in the middle of both sides in the transverse direction of the bridge. The lower baffle and the upper baffle are symmetrically arranged up and down according to the plane where the middle plate is located; the middle plate is composed of a square plate and a second protruding block. The second protruding block is arranged in the middle of both transverse sides and one longitudinal side of the square plate, and the whole is in a shape of a Chinese character 'tu'.

[0011] The transmission slider is composed of a square slider and a first protruding block. The first protruding block is located on both sides of the square slider, and the height of the first protruding block is lower than that of the square slider.

[0012] The material of the transmission-limiting steel column is low yield strength steel.

[0013] The transmission plate is arranged in the middle of both transverse sides and the free side in the longitudinal direction of the bridge, and is connected to the support stop block through the hinge support on the second protruding block.

[0014] The number of the first steel springs is 12, which are respectively arranged between the friction-limiting slider and the upper baffle, and between the transmission slider and the lower baffle.

[0015] The beneficial effects of the present invention:

[0016] 1. The present invention can effectively limit the multi-directional displacement of the bridge body during an earthquake, prevent the beam from falling and being damaged, and buffer the impact of the bridge body displacement. The transmission limit steel column is connected to the friction limit top plate and the transmission slider, which can limit the vertical displacement of the bridge body. The transmission limit steel column is connected to the friction limit top plate and the transmission slider through a ball joint support, which can limit the displacement of the bridge body in the longitudinal and transverse directions. The vertical, longitudinal and transverse directions of the bridge realize multi-directional limitation of the displacement of the bridge body, and the multi-directional limitation structure is simple only by the transmission limit steel column. At the same time, the setting of the first steel spring also alleviates the impact of the bridge body displacement to prevent collision damage.

[0017] 2. The present invention can effectively reduce and consume earthquake energy and reduce bridge damage; the transmission limit steel column is set to limit the multi-directional displacement of the bridge body while achieving the first dissipation of earthquake energy through its own elastic-plastic deformation; the first steel spring can convert earthquake energy into elastic potential energy, further consuming energy to achieve the second dissipation of earthquake energy; the multi-friction layer on the top and side surfaces of the friction limit slider can provide pressure for the displacement of the bridge body while limiting, so that the friction force is greatly increased, and the earthquake energy is consumed more effectively, achieving the third dissipation of earthquake energy; further, when the device is working, the kinetic energy of the bridge body is transmitted to the transmission slider and the friction limit slider through the transmission limit steel column for dissipation, and the friction and collision between the components also make the earthquake energy dissipation more sufficient, achieving the fourth dissipation of earthquake energy;

[0018] 3. The present invention can limit the displacement of the bridge body through friction and collision, and realize the self-locking limit of the bridge body through the transmission mechanism, so as to further limit the displacement of the bridge body and fully dissipate the earthquake energy; the transmission slider arranged at the lower part of the middle plate of the bracket block, the friction limit slider at the upper part of the middle plate and the transmission plate connecting the three together constitute a transmission self-locking limit mechanism. During an earthquake, the displacement of the transmission slider caused by the displacement of the bridge body is transmitted to the transmission plate, and the hinge support arranged at the protruding plate of the middle plate is cooperated so that the displacement of the transmission slider is reversely transmitted to the friction limit slider. The displacement of the friction limit slider resists and limits the displacement of the friction limit top plate to achieve the effect of double limiting and realize self-locking; the friction limit slider and the friction limit top plate move relative to each other, generating friction to further consume energy. At the same time, the setting of the first steel spring can achieve buffering and further energy dissipation effects;

[0019] 4. The present invention can realize the self-reset of the transmission slider and the movable plate and consume energy; the first steel spring arranged in the bracket block can restore the transmission slider to the initial state after the earthquake, so that it always remains at the center; the first steel spring arranged between the friction limit slider and the upper baffle of the bracket block can restore the friction limit slider to the initial state; the first steel spring and the second steel spring can convert the earthquake energy into elastic potential energy, further consuming energy;

[0020] 5. The present invention has a bilaterally symmetrical structure as a whole, is reasonable and simple in structure, is easy to manufacture, has low material prices, is convenient to construct, is energy-saving and environmentally friendly, and is multifunctional. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the main structure of a self-locking, resettable, energy-absorbing, multi-directional limiting bridge anti-seismic device of the present invention;

[0022] Figure 2 This is a top view of the main structure of the present invention after the friction limit top plate is removed;

[0023] Figure 3 It is a top view of the structure below the middle plate of the present invention;

[0024] Figure 4 It is a left view of the main structure of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the transmission slider of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the support stopper of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the friction limit slider of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the friction limit top plate of the present invention;

[0029] Fig. 9 It is a schematic diagram of the overall three-dimensional structure of a self-locking, resettable, energy-absorbing, multi-directional limiting bridge seismic resistance device of the present invention.

[0030] In the figure: 1. steel corbel; 2. friction limit top plate; 3. friction limit slider; 4. bracket block; 5. transmission slider; 6. transmission limit steel column; 7. transmission plate; 8. ball joint support; 9. hinge support; 10. second steel spring; 11. first steel spring; 12. square slider; 13. first protrusion; 14. lower baffle; 15. middle plate; 16. upper baffle; 17. lower square slider; 18. upper tetrahedral slider; 19. square ring limit block; 20. bottom plate; 21. square groove; 22. second protrusion; 23. friction layer. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Example: See Figure 1-9 .

[0033] A self-locking and resetable energy-dissipating multi-directional limiting bridge seismic device, comprising a steel bracket 1, a friction limiting top plate 2, a transmission limiting steel column 6, a transmission slider 5, a friction limiting slider 3, a support stop block 4, a transmission plate 7, a first steel spring 11 and a second steel spring 10; the steel bracket 1 is fixed on the side wall of the pier by bolts; the friction limiting top plate 2 is fixed on the bottom of the bridge girder by bolts, one end of the transmission limiting steel column 6 is connected to the bottom of the friction limiting top plate 2 through a spherical hinge support 8, and the other end is connected to the first protruding block 13 of the transmission slider 5 through a spherical hinge support 8; the support stop block 4 is fixedly connected to the platform of the steel bracket 1, and the transmission slider 5 is connected to the bottom of the support stop block 4 through the first steel spring 11; the friction limiting slider 3 is connected to the upper part of the support stop block 4 through the first steel spring 11; both ends of the transmission plate 7 are fixedly connected with the second steel spring 10 and are connected to the support stop block 4 through a hinge support 9.

[0034] The friction limiting top plate 2 is composed of a square annular limiting block 19 and a bottom plate 20, a square groove 21 is arranged inside the square annular limiting block 19, and the inner wall of the square groove 21 is an inclined plane.

[0035] The friction limiting slider 3 is composed of a lower-layer square slider 17 and an upper-layer frustum-of-a-square-pyramid slider 18, and friction layers 23 are arranged on the top and four sides of the upper-layer frustum-of-a-square-pyramid slider 18.

[0036] The support stop block 4 is composed of an upper baffle 16, a lower baffle 14 and a middle plate 15. One upper baffle 16 is respectively arranged at both ends of the middle plate 15 in the longitudinal direction of the bridge, and one upper baffle 16 is respectively arranged in the middle of both sides in the transverse direction of the bridge. The lower baffle 14 and the upper baffle 16 are symmetrically arranged up and down according to the plane where the middle plate 15 is located; the middle plate 15 is composed of a square plate and a second protruding block 22, and the second protruding block 22 is arranged in the middle of both sides in the transverse direction of the square plate and one side in the longitudinal direction of the square plate, and the whole is in a shape of the Chinese character 'tu'.

[0037] The transmission slider 5 is composed of a square slider 12 and a first protruding block 13, the first protruding block 13 is located on both sides of the square slider 12, and the height of the first protruding block 13 is lower than that of the square slider 12.

[0038] The material of the transmission limiting steel column 6 is low yield strength steel.

[0039] The transmission plate 7 is arranged in the middle of both sides in the transverse direction of the bridge and the free side in the longitudinal direction of the bridge, and is connected to the support stop block 4 through the hinge support 9 on the second protruding block 22.

[0040] The number of the first steel springs 11 is 12, and they are respectively arranged between the friction limiting slider 3 and the upper baffle 16, and between the transmission slider 5 and the lower baffle 14.

[0041] The working principle of the self-locking, resettable, energy-absorbing, multi-directional limiting bridge seismic device of the present invention is as follows: when no earthquake occurs, the transmission limiting steel column 6 is in a vertical position and is not deformed, the transmission plate 7 is in a vertical position, the first steel spring 11 and the second steel spring 10 are in an initial state without deformation, the transmission slider 5 and the friction limiting slider 3 are both in the initial position, the friction limiting top plate 2 is in the initial position, and the center coincides with the center of the friction limiting slider 3. When a smaller earthquake occurs, a relative displacement occurs between the bridge main beam and the bridge pier, first driving the friction limit top plate 2, and the friction limit top plate 2 drives the transmission limit steel column 6, transferring the force to the transmission slider 5 and driving it to slide, compressing and stretching the first steel spring 11 to consume energy and limit the displacement of the bridge body. At this time, the transmission limit steel column 6 acts as a transmission structure and only undergoes slight deformation; when the earthquake intensity is larger, the transmission limit steel column 6 deforms under the tension of the friction limit top plate 2, limits the displacement of the bridge body, and consumes the earthquake energy through elastic-plastic deformation, further limiting the displacement of the bridge body; the connecting piece is a ball joint support 8, which limits the displacement of the bridge body in the longitudinal, transverse and vertical directions, realizing multi-directional limitation. The displacement of the bridge body drives the transmission slider 5 to slide, and drives one end of the transmission plate 7. The transmission plate 7 cooperates with the hinge support 9 set at the middle plate 15 to push the friction limit slider 3 in the opposite direction, so that the displacement of the transmission slider 5 is reversely transmitted to the friction limit slider 3, and the displacement of the friction limit slider 3 is used to resist and limit the displacement of the friction limit top plate 2, so as to achieve the effect of double limiting and realize self-locking; while resisting the displacement of the friction limit top plate 2, the friction limit slider 3 is relatively displaced with the friction limit top plate 2, and a huge friction force is generated by the pressure of the friction limit top plate 2 and the friction layer 23 set on the friction limit slider 3, which greatly consumes the kinetic energy and seismic energy of the bridge body and limits the displacement of the bridge body. After the earthquake, the transmission slider 5 and the friction limit slider 3 can be restored to their initial positions by the restoring force of the first steel spring 11 and the second steel spring 10 to achieve the reset effect for the next use.

[0042] It should be noted that in the above description, the directions or positional relationships indicated by the terms "left", "right", "front", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes. The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent transformations made using the contents of the present specification and drawings or directly or indirectly applied in related technical fields should be included in the patent protection scope of the present invention.

Claims

1. A self-locking, resettable, energy-consuming, multi-directional, limited bridge seismic device, characterized in that: It includes a steel bracket (1), a friction limiting top plate (2), a transmission limiting steel column (6), a transmission slider (5), a friction limiting slider (3), a support stop block (4), a transmission plate (7), a first steel spring (11) and a second steel spring (10); the steel bracket (1) is fixed on the side wall of the bridge pier by bolts; the friction limiting top plate (2) is fixed on the bottom of the bridge girder by bolts, one end of the transmission limiting steel column (6) is connected to the bottom of the friction limiting top plate (2) through a spherical hinge support (8), and the other end is connected to the first protruding block (13) of the transmission slider (5) through a spherical hinge support (8); the support stop block (4) is fixedly connected to the platform of the steel bracket (1), and the transmission slider (5) is connected to the bottom of the support stop block (4) through a first steel spring (11); the friction limiting slider (3) is connected to the upper part of the support stop block (4) through a first steel spring (11); both ends of the transmission plate (7) are fixedly connected with a second steel spring (10) and are connected to the support stop block (4) through a hinge support (9). The friction limiting top plate (2) consists of a square annular limiting block (19) and a bottom plate (20), a square groove (21) is arranged inside the square annular limiting block (19), and the inner wall of the square groove (21) is an inclined plane; the friction limiting slider (3) consists of a lower layer square slider (17) and an upper layer quadrangular pyramid slider (18), and friction layers (23) are arranged on the top and four sides of the upper layer quadrangular pyramid slider (18); the support stop block (4) consists of an upper baffle (16), a lower baffle (14) and a middle plate (15), one upper baffle (16) is arranged at each of the two end parts of the middle plate (15) in the longitudinal direction of the bridge, and one upper baffle (16) is arranged in the middle of each of the two sides in the transverse direction of the bridge, and the lower baffle (14) and the upper baffle (16) are symmetrically arranged up and down according to the plane where the middle plate (15) is located.

2. A self-locking, resettable, energy-absorbing, multi-directional, limited bridge seismic device according to claim 1, characterized in that: The middle plate (15) consists of a square plate and a second protruding block (22), and the second protruding block (22) is arranged in the middle of the two transverse sides and one longitudinal side of the square plate, presenting a shape like the Chinese character 'tu' as a whole.

3. A self-locking, resettable, energy-absorbing, multi-directional, limited bridge seismic device according to claim 1, characterized in that: The transmission slider (5) consists of a square slider (12) and a first protruding block (13), the first protruding block (13) is located on both sides of the square slider (12), and the height of the first protruding block (13) is lower than that of the square slider (12).

4. A self-locking, resettable, energy-absorbing, multi-directional, limited bridge seismic device according to claim 1, characterized in that: The material of the transmission limiting steel column (6) is low yield strength steel.

5. A self-locking, resettable, energy-absorbing, multi-directional, limited bridge seismic device according to claim 1, characterized in that: The transmission plate (7) is arranged in the middle of the two transverse sides and the free side in the longitudinal direction of the bridge, and is connected to the support stop block (4) through a hinge support (9) on the second protruding block (22).

6. A self-locking, resettable, energy-absorbing, multi-directional, limited bridge seismic device according to claim 1, characterized in that: The number of the first steel springs (11) is 12, which are respectively arranged between the friction limiting slider (3) and the upper baffle (16), and between the transmission slider (5) and the lower baffle (14).

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