Transverse limiting and damping structure for bridge

Abstract

The invention relates to the technical field of bridge seismic resistance, and provides a bridge transverse limiting and damping structure which comprises a cross beam and a cover beam, the cross beam is arranged on the cover beam, fixing check blocks are arranged on the two sides of the cover beam, flange plates are arranged on the two sides of the bottom of the cross beam, sliding spaces are formed between the fixing check blocks on the respective sides and the flange plates, and the bridge transverse limiting and damping structure further comprises sliding check blocks. The sliding type check block is arranged on the cover beam through a fixed connecting piece and located in the sliding space below the flange plate, and an elastic connecting piece is arranged between the sliding type check block and the cross beam. Through the arrangement of the sliding type check blocks and the elastic connecting pieces, the anti-seismic effect can be achieved in both small earthquakes and large earthquakes, the collision effect between the fixed check blocks and the cross beams is relieved, main beam resetting can be achieved by means of obvious structural characteristics, and the anti-seismic effect is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge earthquake resistance, and in particular to a bridge lateral limit shock absorbing structure. Background Art

[0002] As the main horizontal limit structure of the bridge main beam and an important part of the bridge seismic system, the importance of the block is self-evident. The seismic performance of the block is closely related to its performance in "limitation" and "force transmission". Under the action of an earthquake, the block will collide with the main beam, limit the excessive horizontal displacement of the main beam through its own strength and stiffness, and transmit the lateral inertia force and collision force of the main beam to the lower structure. In actual earthquake damage, the displacement or even falling of the main beam is usually caused by the insufficient efficiency of the longitudinal limit device at the expansion joint or the damage of the horizontal block.

[0003] In some existing typical technical solutions, the block is only used as a reinforcement for the transverse structure of the bridge, which is difficult to play an effective protective role in earthquakes, which makes the bridge as a whole very vulnerable to earthquakes. In addition, in related technologies, the seismic structure of the bridge is often set up separately, which increases the difficulty and cost of installation, and the separate installation also requires the configuration of installation space, which increases the installation cost. Summary of the invention

[0004] The present invention provides a bridge transverse limit shock absorbing structure, which is used to solve the defects in the prior art that the stopper is difficult to effectively resist earthquakes, and the existing separate earthquake-resistant structure is complex and costly.

[0005] The present invention provides a transverse limit shock absorbing structure of a bridge, comprising a crossbeam and a cap beam, wherein the crossbeam is arranged on the cap beam, fixed blocks are arranged on both sides of the cap beam, flange plates are arranged on both sides of the bottom of the crossbeam, and sliding spaces are formed between the fixed blocks on each side and the flange plates, and further comprising: a sliding block, wherein the sliding block is arranged on the cap beam through a fixed connecting piece and is located in the sliding space below the flange plate, and an elastic connecting piece is arranged between the sliding block and the crossbeam.

[0006] According to the transverse limiting shock absorbing structure of the bridge provided by the present invention, a flexible pad is provided on the side of the sliding block close to the fixed block, and the surface of the flexible pad is an arc-shaped structure.

[0007] According to the transverse limit shock absorbing structure of the bridge provided by the present invention, the flange plate and the cross beam are integrally formed, and the flange plate is formed on the outer side of the web of the cross beam.

[0008] According to the transverse limiting shock-absorbing structure of the bridge provided by the present invention, the bottom of the flange plate is provided with a concave arc surface, and the top surface of the sliding type stopper is correspondingly provided with a convex mating surface mating with the arc surface, and a spacing is provided between the arc surface and the mating surface.

[0009] According to the transverse limiting and shock-absorbing structure of the bridge provided by the present invention, the fixed connecting part includes a fixed steel plate and prestressed steel bars, the fixed steel plate passes through the cap beam, one end of the prestressed steel bar is located at the bottom of the cap beam and fixedly connected to the fixed steel plate, and the other end of the prestressed steel bar is fixedly connected to the sliding type stopper.

[0010] According to the transverse limit shock absorbing structure of the bridge provided by the present invention, the prestressed steel bar passes through the sliding block and is riveted on the top of the sliding block.

[0011] According to the transverse limit shock absorbing structure of the bridge provided by the present invention, a slide groove is further provided on the cap beam, and the slide groove extends along both sides of the cap beam and is arranged opposite to the prestressed steel bars.

[0012] According to the transverse limit shock absorbing structure of the bridge provided by the present invention, the elastic connecting member includes a plurality of return springs, and the plurality of return springs are evenly arranged between the sliding block and the crossbeam.

[0013] According to the bridge lateral limit shock absorbing structure provided by the present invention, the return spring includes a spring body made of shape memory alloy, and spring clamps connected to both ends of the spring body, so as to achieve fixed connection of the spring body through the spring clamps.

[0014] According to the transverse limiting shock-absorbing structure of the bridge provided by the present invention, the height of the fixed baffle is higher than or equal to the top surface of the flange plate, and a rubber pad with an outwardly convex arc structure is provided on the end of the flange plate facing the fixed baffle.

[0015] The present invention provides a bridge transverse limit shock-absorbing structure. Through the setting of sliding blocks and elastic connectors, the displacement generated is small during a small earthquake. At this time, the sliding blocks do not slide under the action of prestress, and the lateral seismic response and displacement of the beam during the earthquake can be reduced through the elastic connector, and a certain degree of reset can be achieved through the elastic connector. During a large earthquake, the displacement is large, and the fixed baffles, sliding blocks and flange plates on both sides of the beam can cooperate to play a fixed limit role to prevent the beam from falling, and the elastic connector can resist part of the vibration to improve the earthquake resistance effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the bridge lateral limit shock absorbing structure provided by the present invention.

[0018] Figure 2 The present invention provides Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0019] Figure 3 It is a structural schematic diagram of the slide groove arrangement in the bridge transverse limit shock absorbing structure provided by the present invention.

[0020] Reference numerals: 10. Cross beam; 11. Flange plate; 12. Rubber cushion; 13. Arc surface; 20. Cap beam; 21. Fixed stopper; 22. Slide groove; 30. Sliding stopper; 31. Flexible pad; 40. Elastic connector; 50. Fixed connector; 51. Fixed steel plate; 52. Prestressed steel bar. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of explaining the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0026] In the related technology, the design of the block is based on the current specifications of my country. The block is only used as a transverse structure of the bridge for reinforcement, and its seismic response is not considered. Its effect in earthquake resistance is limited, and it is difficult to achieve effective earthquake resistance. Other industry-related earthquake-resistant structures are mostly separate earthquake-resistant structures. The construction cost of a separate earthquake-resistant structure is high, and an additional separate location needs to be designed for installation, which increases the complexity of the overall structure and makes installation more difficult.

[0027] Regarding the problems in related technologies, such as Figure 1-Figure 3As shown, this embodiment provides a transverse limit shock absorbing structure for a bridge, including a cross beam 10 and a cap beam 20, the cross beam 10 is arranged on the cap beam 20, fixed blocks 21 are arranged on both sides of the cap beam 20, flange plates 11 are arranged on both sides of the bottom of the cross beam 10, and sliding spaces are formed between the fixed blocks 21 on each side and the flange plates 11, and also includes a sliding block 30, which is arranged on the cap beam 20 through a fixed connector 50 and is located in the sliding space below the flange plate 11, and an elastic connector 40 is arranged between the sliding block 30 and the cross beam 10. The cap beam 20 serves as a supporting platform for the cross beam 10, and the cross beam 10 will move during an earthquake. When the movement is too large, the cross beam 10 will have the risk of falling off. In this embodiment, the sliding block 30 and the fixed block 21 are provided to effectively resist earthquakes of different levels, and the elastic connector 40 can be used to reset the beam 10 to a certain extent after the earthquake.

[0028] Specifically, the cap beam 20 is arranged on the pier column, and the column is used to support the cap beam 20 and the cross beam 10 on the upper part of the cap beam 20. In the specific setting, fixed blocks 21 are arranged on both sides of the cap beam 20, and the main body of the cross beam 10 is located between the fixed blocks 21 on both sides. The sliding block 30 is arranged in the sliding space and is located below the flange plate 11, which can play an energy absorption role in a larger earthquake, thereby achieving earthquake resistance. Among them, the cross beam can be a cross beam structure at any position of the middle cross beam, the end cross beam, and the middle cross beam.

[0029] According to some embodiments provided by the present invention, a flexible pad 31 is provided on the side of the sliding block 30 close to the fixed block 21, and the surface of the flexible pad 31 is an arc-shaped structure. When a large earthquake occurs, the suppression range of the sliding block 30 and the elastic connector 40 is exceeded. At this time, the sliding block will move in the sliding space and form a fixed blocking structure together with the fixed block 21, thereby increasing the collision surface from a physical level, reducing the occurrence of non-uniform collisions, and retaining the ability of the fixed block 21 to the greatest extent, thereby preventing the crossbeam 10 from detaching. In this case, the sliding block 30 cannot achieve its reset ability, but the structural rigidity is increased, and the limiting ability of the main beam is enhanced.

[0030] like Figure 1 As shown, the cross beam 10 includes a main structure and webs on both sides, the webs on both sides are located between two fixed blocks 21 and fixedly connected to the cap beam 20. The flange plate 11 is located on the web, and a sliding block 30 is arranged below the flange plate 11, the bottom surface of the sliding block 30 contacts the upper surface of the cap beam 20, so that the upper surface of the cap beam 20 is a sliding surface, and after the fixed connection member 50 is broken, the sliding block 30 can slide on the sliding surface.

[0031] Specifically, the sliding block 30 is a block-shaped structure as a whole, and a flexible pad 31 is provided on the side of the sliding block 30 facing the fixed block 21. The flexible pad 31 can reduce the impact on the fixed block 21 during the collision of the sliding block 30, thereby further improving the anti-seismic performance. Further, by setting the surface of the flexible pad 31 to a convex arc structure, the anti-seismic performance can be further enhanced.

[0032] The flexible pad 31 may be a rubber pad layer 12, or may be other flexible materials, such as a flexible pad 31 made of polyurethane material, a flexible pad 31 made of silicone material, etc.

[0033] It is understandable that the fixed stopper 21, as the main limiting structure, may be damaged due to the stress concentration caused by the local impact when it is subjected to a local impact. In this embodiment, during a large earthquake, the lateral displacement of the beam 10 is large, so that the flange plate 11 will press on the sliding stopper 30, and the sliding stopper 30 will slip. As the lateral displacement further increases, the connection of the fixed connector 50 will fail, causing the sliding stopper 30 to collide with the fixed stopper 21. Such a structure can increase the contact area of ​​the collision, thereby reducing local stress, improving the stability of the fixed stopper 21, and realizing stable limiting of the beam 10, preventing the beam 10 from detaching from the cap beam 20.

[0034] In some specific implementations, the height of the fixed baffle is higher than or equal to the top surface of the flange plate 11, and a rubber cushion layer 12 with an outwardly convex arc structure is provided on the end of the flange plate 11 facing the fixed baffle. The height of the rubber cushion layer 12 and the fixed baffle is limited, so that the contact surface with the fixed baffle can be further increased during a collision, thereby avoiding stress concentration on the fixed baffle, achieving stress dispersion, and ensuring that the fixed baffle has a stable limiting effect.

[0035] It is understandable that during a major earthquake, the elastic connector 40 fails, the flange plate 11 presses on the sliding block 30, and the fixed connector 50 breaks, causing the sliding block 30 to slide in the sliding space and collide with the fixed block 21 during the sliding process. In this embodiment, by providing the rubber pad 12 and the flexible pad 31 on the sliding block 30, when colliding with the fixed block 21, the contact area can be increased to avoid stress concentration, and by providing the lower rubber pad 12 and the flexible pad 31, it can further play an anti-seismic role and achieve effective anti-seismic effect.

[0036] According to some embodiments provided by the present invention, Figure 2As shown, the flange plate 11 is integrally formed with the cross beam 10, and the flange plate 11 is formed on the outside of the web of the cross beam 10. The arrangement of the flange plate 11 enables it to play a certain bearing role through the sliding block 30 during a large earthquake, and can increase the friction force of the sliding block 30, thereby improving the earthquake resistance effect.

[0037] Specifically, the flange plate 11 and the cross beam 10 are cast in one piece, the flange plate 11 is protruding on the web, a gap is provided between the bottom surface of the flange plate 11 and the surface of the cap beam 20, and the sliding block 30 is provided in the gap. An elastic connector 40 is provided on the web below the flange plate 11, that is, one end of the elastic connector 40 is connected to the web, and the other end of the elastic connector 40 is connected to the sliding block 30. The elastic connector 40 can achieve earthquake resistance in smaller earthquakes and can achieve a certain degree of position recovery.

[0038] In some embodiments, the bottom of the flange plate 11 is provided with a concave arc surface 13, and the top surface of the sliding type stopper 30 is provided with a convex mating surface that matches the arc surface 13, and a distance is provided between the arc surface 13 and the mating surface. The provision of the arc surface 13 can avoid excessive stress concentration during contact, making the contact stress distribution more uniform, thereby avoiding contact damage caused by a large earthquake.

[0039] Specifically, the thickness of the flange plate 11 gradually decreases from the root to the distal end to form an arc surface 13, corresponding to a mating surface convexly processed on the top of the sliding block 30, and the mating surface and the arc end of the arc surface 13 are cocentrically arranged.

[0040] It is understandable that this method can reduce the concentration of contact stress between the flange plate 11 and the sliding block 30, and on the other hand, the thickening of the flange plate 11 near the root position can improve the overall strength, making the structural strength of the flange plate 11 higher. In addition, this method can also increase the friction between the sliding block 30 and the cap beam 20 when the flange plate 11 and the sliding block 30 are in contact.

[0041] In specific configuration, a buffer layer can be provided on both the arc surface 13 and the mating surface, and the buffer layer can further reduce the contact stress between the two and avoid stress concentration. The buffer layer can be a contact layer made of a flexible material, such as a rubber layer, a silicone layer, etc.

[0042] According to some embodiments provided by the present invention, the fixed connection member 50 includes a fixed steel plate 51 and a prestressed steel bar 52, the fixed steel plate 51 passes through the cap beam 20, one end of the prestressed steel bar 52 is located at the bottom of the cap beam and is fixedly connected to the fixed steel plate 51, and the other end of the prestressed steel bar 52 is fixedly connected to the sliding block 30. In this way, the sliding block 30 can be prevented from sliding during small vibrations, and energy consumption is achieved through the elastic connection member 40, so that the anti-seismic effect can be achieved, the overall structure is simple, and the manufacturing difficulty and cost are low.

[0043] Specifically, the fixed steel plate 51 is arranged at the bottom of the cap beam 20, and the prestressed steel bar 52 is connected to the fixed steel plate 51 by bolts or the like. The prestressed steel bar 52 connects the sliding block 30 to the surface of the cap beam 20, and applies tension to the steel bar, so that the friction between the sliding block 30 and the cap beam 20 is larger, which is greater than the lateral seismic force of the beam 10, thereby preventing the sliding block 30 from slipping during small vibrations.

[0044] It can be understood that when a small earthquake occurs, the elastic connecting piece 40 between the sliding block 30 and the beam 10 is compressed, and the flange plate 11 at the web of the beam 10 in the horizontal direction is squeezed and collided with the sliding block 30. A part of the gravity of the beam 10 is transmitted to the sliding block 30 through the flange plate 11, thereby increasing the friction between the sliding block 30 and the surface of the cap beam 20. Once the sliding block 30 is slightly displaced, the prestressed tendons are stretched, the prestress increases, and the prestressed steel bars 52 can consume earthquake energy. If the sliding block 30 is displaced significantly, part of the seismic energy will be consumed by the prestressed steel bar 52, and the other part will be consumed by the sliding friction between the sliding block 30 and the cap beam 20. When the lateral seismic response is not large, the energy consumption of the prestressed beam and the sliding friction energy can meet the horizontal energy demand of the earthquake. When the earthquake is over, the elastic connecting member 40 can be used to reset the beam 10 to a certain extent, thereby achieving the design goal of limiting the displacement of the beam 10 and protecting the fixed block 21 to reduce damage.

[0045] In the specific configuration, the prestressed steel bar 52 passes through the sliding block 30 and is riveted on the top of the sliding block 30. In this way, a tensile force can be applied to the steel bar, so that the steel bar can act as a prestressed steel bar 52 to increase the friction between the sliding block 30 and the cap beam 20, so that the sliding block 30 does not slip during a small vibration.

[0046] Specifically, one end of the prestressed steel bar 52 is riveted or bolted to the fixed steel plate 51, and the other end of the prestressed steel bar 52 is riveted to the sliding block 30, thereby forming a fixed structure, so that the sliding block 30 is "fixed" on the surface of the cap beam 20. Through the bolt connection, the prestressed steel bar 52 can be quickly connected and restored after a large vibration, which is convenient for replacing the prestressed steel bar 52.

[0047] According to some embodiments provided by the present invention, Figure 3 As shown, the cap beam 20 is also provided with a slide groove 22, which extends along both sides of the cap beam 20 and is arranged directly opposite to the prestressed steel bar 52. The provision of the slide groove 22 can avoid damage to the cap beam 20 when the sliding block 30 moves, thereby improving the stability of the overall structure.

[0048] Specifically, the upper surface of the cap beam 20 is a sliding surface. When a large earthquake occurs, the lateral seismic response is large, exceeding the deformation capacity of the elastic connector 40, the elastic connector 40 fails, the prestressed steel bar 52 is sheared, and the sliding block 30 enters the elastic-plastic stage. The sliding block 30, the arc-shaped rubber cushion 12 and the fixed block 21 form a new block, which increases the collision area from a physical level, reduces the occurrence of non-uniform collisions, and retains the capacity of the fixed block 21 to the greatest extent. After the earthquake, the flange plate 11, the rubber cushion 12, the elastic connector 40 and the sliding block 30 can be partially repaired. In this case, the sliding block 30 cannot realize its reset ability, but the structural stiffness is increased, and the limiting ability of the main beam is enhanced. This structure can dissipate part of the seismic force and play a certain degree of reset while playing the function of preventing the beam from falling and controlling the displacement of the beam body, so as to achieve the effect of graded defense, reduce the seismic force transmitted to the lower structure of the bridge such as the pier, and improve the overall seismic performance of the bridge.

[0049] Furthermore, after the prestressed steel bar 52 is cut, a portion of it will protrude from the bottom surface of the sliding block 30. At this time, if the sliding block 30 is subjected to the pressure of the flange plate 11 and moves left and right, the protruding position will cause stress concentration. In this embodiment, the width of the chute 22 is greater than the diameter of the prestressed steel bar 52, and the prestressed steel bar 52 is located in the chute 22 during the sliding process, thereby avoiding the problem of stress concentration causing damage to the cap beam 20. Specifically, Figure 1 Figure 3 As shown, the slide groove 22 extends vertically downward from the upper surface of the cap beam 20 to the bottom of the cap beam 20, so as to realize the sliding of the sliding block 30 along the slide groove during vibration.

[0050] According to some embodiments provided by the present invention, the elastic connector 40 includes a plurality of return springs, and the plurality of return springs are evenly arranged between the sliding block 30 and the crossbeam 10. The arrangement of the return springs makes it easier to connect, and the difficulty and cost of preparation are lower.

[0051] It is understandable that a spring group is formed by a plurality of return springs, thereby being able to enhance earthquake resistance, and in particular, being able to absorb vibration energy and restore position during smaller earthquakes.

[0052] In the specific configuration, the reset spring includes a spring body made of shape memory alloy and spring chucks connected to both ends of the spring body, so that the spring body is fixedly connected through the spring chucks. The setting of the material of the spring body enables it to have higher performance, higher adaptability and higher adjustment ability.

[0053] Specifically, the shape memory alloy reset spring is also known as the SMA spring (Shape Memory Alloy, SMA), which usually includes nickel-titanium alloy (NiTi) and copper-based alloy, etc. Through the limitation of the material, it has a stronger shape recovery ability, thereby driving the beam 10 to recover to the position before the earthquake to a certain extent. Spring clamps are provided at both ends of the spring body, wherein the spring clamp at one end is fixedly connected to the web of the beam 10, and the spring clamp at the remaining end is fixedly connected to the sliding block 30. And multiple reset springs are arranged in an array between the two, thereby forming a spring group, which can provide a greater elastic force through the spring group, thereby facilitating the recovery of the position of the beam 10.

[0054] Through the description of the above embodiments, those skilled in the art can clearly understand that in each embodiment, the sliding block 30 and the reset spring are set to partially consume the energy generated by the collision between the block and the main beam through compression deformation, friction, and prestressed steel strands under earthquake force, and the main beam is reset to a certain extent through spring recovery, thereby achieving the design goal of limiting the displacement of the main beam and protecting the block to reduce damage. Furthermore, the rubber pad 12 and the flexible pad 31 can reduce the local stress concentration damage caused by the collision to the flange plate 11 and the fixed block 21, and the fixed block 21 and the sliding block 30 to a certain extent. Furthermore, when a small earthquake occurs, the SMA spring between the sliding block 30 and the beam 10 is compressed, and the flange plate 11 at the web of the beam 10 in the horizontal direction is squeezed and collided with the sliding block 30. Part of the gravity of the main beam is transmitted to the sliding block 30 through the special-shaped flange plate 11, thereby increasing the friction between the sliding block 30 and the cap beam 20. Once the sliding block 30 is slightly displaced, the prestressed beam is stretched, the prestress is increased, and the prestressed steel bar 52 can consume the seismic energy. If the sliding block 30 is significantly displaced, part of the seismic energy is consumed by the prestressed steel bar 52, and the other part is consumed by the friction energy of the sliding surface between the sliding block 30 and the cap beam 20. When the lateral seismic response is not large, the energy consumption of the prestressed beam and the friction energy consumption of the sliding surface can meet the energy demand of the earthquake in the horizontal direction. When the earthquake is over, the main beam can be reset to a certain extent with the help of the SMA spring, and the structure is in an elastic state. Under a large earthquake, the lateral seismic response is large, exceeding the deformation capacity of the SMA spring, the spring fails, the prestressed steel bar 52 is cut off, and the sliding block 30 enters the elastic-plastic stage. The sliding block 30, the arc-shaped rubber pad 12 and the fixed block 21 form a new block, which increases the collision area from a physical level, reduces the occurrence of non-uniform collisions, and retains the capacity of the fixed block 21 to the greatest extent. After the earthquake, the flange plate 11, the flexible pad 31, the rubber pad 12, the spring group and the sliding block 30 can be partially repaired. In this case, the sliding block 30 cannot realize its reset ability, but the structural stiffness is increased, and the limiting ability of the main beam is enhanced. This structure can dissipate part of the seismic force and play a certain degree of reset while playing the function of preventing the beam from falling and controlling the displacement of the beam body, so as to achieve the effect of graded defense and reduce the seismic force transmitted to the lower structure of the bridge such as the pier.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bridge transverse limit shock absorbing structure, comprising a crossbeam and a cap beam, wherein the crossbeam is arranged on the cap beam, and is characterized in that: Both sides of the cap beam are provided with fixed blocks, both sides of the bottom of the cross beam are provided with flange plates, and a sliding space is formed between the fixed blocks on each side and the flange plates, and further comprising: A sliding stopper is arranged on the cap beam through a fixed connecting piece and is located in the sliding space below the flange plate. An elastic connecting piece is arranged between the sliding stopper and the cross beam.

2. The bridge lateral limit shock absorbing structure according to claim 1 is characterized in that: A flexible pad is provided on one side of the sliding stopper close to the fixed stopper, and the surface of the flexible pad is an arc-shaped structure.

3. The bridge lateral limit shock absorbing structure according to claim 1 is characterized in that: The flange plate is integrally formed with the cross beam, and the flange plate is formed on the outer side of the web plate of the cross beam.

4. The bridge lateral limit shock absorbing structure according to claim 3 is characterized in that: The bottom of the flange plate is provided with a concave arc surface, and the top surface of the sliding stopper is correspondingly provided with a convex matching surface matching with the arc surface, and a certain distance is provided between the arc surface and the matching surface.

5. The bridge lateral limit shock absorbing structure according to claim 1, characterized in that: The fixed connection member includes a fixed steel plate and prestressed steel bars. The fixed steel plate passes through the cap beam, and one end of the prestressed steel bar is located at the bottom of the cap beam and fixedly connected to the fixed steel plate, and the other end of the prestressed steel bar is fixedly connected to the sliding block.

6. The bridge lateral limit shock absorbing structure according to claim 5, characterized in that: The prestressed steel bar passes through the sliding block and is riveted on the top of the sliding block.

7. The bridge transverse limit shock absorbing structure according to claim 5, characterized in that: The cap beam is also provided with a slide groove, which extends along both sides of the cap beam and is arranged opposite to the prestressed steel bars.

8. The bridge lateral limit shock absorbing structure according to claim 1, characterized in that: The elastic connecting member comprises a plurality of return springs, and the plurality of return springs are evenly arranged between the sliding stopper and the crossbeam.

9. The bridge lateral limit shock absorbing structure according to claim 8, characterized in that: The return spring comprises a spring body made of shape memory alloy and spring clamps connected to both ends of the spring body, so that the spring body is fixedly connected through the spring clamps.

10. The bridge transverse limit shock absorbing structure according to claim 1, characterized in that: The height of the fixed baffle is higher than or equal to the top surface of the flange plate, and a rubber cushion layer with an outwardly convex arc structure is arranged on the end of the flange plate facing the fixed baffle.

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