Sliding type check block with torsion adapting function and connecting structure of sliding type check block

Abstract

The invention relates to the technical field of bridges, and provides a slippage type check block with a torsion adapting function and a connecting structure of the slippage type check block. The stop block structure comprises a stop block, a torsion reset assembly and a transverse reset assembly. An accommodating cavity is formed in the stop block; the torsion reset assembly comprises a bolt, a nut, a sleeve and a double-torsion spring, the bolt penetrates through the cover beam and the check block and is matched with the nut, the sleeve is arranged on the bolt in a sleeving mode, the double-torsion spring is arranged on the sleeve in a sleeving mode and located in the containing cavity, and the check block can rotate relative to the sleeve and can slide relative to the cover beam; the transverse reset assembly comprises a first elastic reset piece, one end of the first elastic reset piece is connected with the check block, and the other end of the first elastic reset piece is connected with the main beam. The device can be used for oblique crossing and curved bridges, on one hand, adaptive torsion can occur, meanwhile, the self-resetting function of torsion and sliding can be achieved through the double torsion springs and the laminated arc-shaped steel plates after collision, energy generated by collision is relieved through friction displacement consumed by the check blocks, and the device has the advantages of being capable of being repaired after an earthquake and easy to replace.

Description

Technical Field

[0001] The present invention relates to the technical field of bridges, and in particular to a sliding stopper capable of adapting to torsion and a connection structure thereof. Background Art

[0002] Under the action of earthquakes, bridge structures may be damaged or even collapse catastrophically due to insufficient seismic resistance or unreasonable seismic isolation design, which seriously affects post-disaster rescue and reconstruction work. Statistics show that the ratio of the damage rate of bridge blocks to the displacement of the main beam is 19.5%, which is much higher than the damage rate of bridge piers (only 2.3%). In addition, due to the bending-torsion coupling stress characteristics of curved beam bridges, especially small-radius curved beam bridges, the main beams may flip and shift radially during earthquakes, and the main beams may twist and shift as a whole along the vertical axis of the fixed piers. At this time, the damage rate of the blocks increases significantly.

[0003] At present, in my country's bridge construction, the commonly used transverse anti-falling beam limit devices are mostly integral concrete blocks. However, the design of these blocks usually relies on construction experience or design habits for reinforcement, lacking clear design guidance. Therefore, in actual projects, the seismic performance of the blocks has not been fully utilized, their strengths vary greatly, and the force mode and failure form are unclear. Even under strong earthquakes, the cap beam may suffer varying degrees of damage, while the main beam has no effective limit. Summary of the invention

[0004] The present invention provides a sliding stopper with torsion adaptability and a connection structure thereof, which are used to solve the defect that the existing integral concrete stopper is prone to functional failure when an earthquake occurs, seriously affecting the earthquake resistance and post-disaster reset capability of the bridge.

[0005] One aspect of the present invention provides a sliding stopper capable of adapting to torsion, comprising a stopper, a torsion reset assembly and a lateral reset assembly.

[0006] The stopper is arranged on the cap beam, and the stopper is located on the outside of the main beam, and an accommodating cavity is arranged in the stopper; the torsion reset assembly includes a bolt, a nut, a sleeve and a double torsion spring, and the bolt is passed through the cap beam and the stopper and cooperates with the nut to fix the stopper to the cap beam, the sleeve is sleeved on the bolt, and the double torsion spring is sleeved on the sleeve, and the double torsion spring is located in the accommodating cavity, and the two spiral arms of the double torsion spring are respectively connected to the inner wall of the accommodating cavity, and the stopper can rotate relative to the sleeve and can slide relative to the cap beam; the lateral reset assembly includes a first elastic reset member, one end of the first elastic reset member is connected to the stopper, and the other end of the first elastic reset member is used to connect with the main beam.

[0007] According to the sliding stopper with torsion adaptability provided by the present invention, the lateral reset assembly further comprises two second elastic reset members, and the two second elastic reset members are respectively arranged on opposite sides of the sleeve in the lateral direction.

[0008] According to the torsion-adaptable sliding stopper provided by the present invention, the second elastic reset member is a leaf spring.

[0009] According to the sliding type stopper with torsion adaptability provided by the present invention, the sleeve includes a first barrel section and a second barrel section connected to each other, the first barrel section is passed through the cap beam, and the second barrel section is passed through the stopper; the first barrel section is a rectangular barrel section, and the second barrel section is a circular barrel section, the leaf spring is arranged on the outer wall of the rectangular barrel section, and the double torsion spring is sleeved on the circular barrel section.

[0010] According to the torsion-adaptable sliding stopper provided by the present invention, a connecting plate is provided on the spiral arm of the double torsion spring, and a stiffening rib is provided between the connecting plate and the inner wall of the accommodating cavity.

[0011] According to the sliding stopper with torsion adaptability provided by the present invention, the first elastic reset member is an SMA spring group, and the SMA spring group is connected to the stopper and the main beam through a spring clamp.

[0012] On the other hand, the present invention provides a connection structure, including a cap beam and a sliding stopper with torsion adaptability as described in any of the above items, wherein the stopper is arranged between the cap beam and the main beam, and the stopper is located on the outside of the main beam. The bolt passes through the cap beam and the stopper and cooperates with the nut to fix the stopper to the cap beam, one end of the first elastic return member is connected to the stopper, and the other end of the first elastic return member is used to connect to the main beam.

[0013] According to the connection structure provided by the present invention, a gap is provided between the leaf spring and the inner wall on the opposite side of the sliding groove.

[0014] According to the connection structure provided by the present invention, the top surface of the cap beam is provided with a friction surface for increasing the friction force between the cap beam and the stopper.

[0015] According to the connection structure provided by the present invention, a pad is provided between the nut and the bottom surface of the cap beam.

[0016] The torsion-adaptable sliding block and its connection structure provided by the present invention can consume earthquake energy by utilizing the friction between the block and the cap beam, and can also consume earthquake energy by using a torsional reset assembly and a lateral reset assembly while resetting the main beam and the block, and has the advantages of being repairable and easy to replace after an earthquake.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a schematic diagram of a sliding stopper with torsion adaptability provided in an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of a connection structure provided by an embodiment of the present invention.

[0021] Figure 3 It is a schematic longitudinal section diagram of a connection structure provided by an embodiment of the present invention.

[0022] Figure 4 It is a top view of the connection structure provided by an embodiment of the present invention.

[0023] Reference numerals: 10. Cap beam; 110. Sliding groove; 20. Main beam; 30. Block; 310. Accommodating chamber; 40. Torsion reset assembly; 410. Bolt; 420. Nut; 430. Sleeve; 431. First barrel section; 432. Second barrel section; 440. Double torsion spring; 450. Connecting plate; 460. Stiffening rib; 470. Pad; 50. Transverse reset assembly; 510. First elastic reset member; 520. Second elastic reset member. DETAILED DESCRIPTION

[0024] 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.

[0025] 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 describing 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.

[0026] 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.

[0027] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the 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, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0028] 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 do not necessarily refer to 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.

[0029] Combine the following Figures 1 to 4 The invention describes a sliding stopper capable of adapting to torsion and a connection structure thereof.

[0030] See also Figure 1 As shown, the sliding stopper with torsion adaptability provided by the embodiment of the present invention includes: a stopper 30 , a torsion reset assembly 40 and a lateral reset assembly 50 .

[0031] The stopper 30 is provided on the cap beam 10, and the stopper 30 is located on the outside of the main beam 20. An accommodating cavity 310 is provided in the stopper 30; the torsion reset assembly 40 includes a bolt 410, a nut 420, a sleeve 430 and a double torsion spring 440. The bolt 410 is passed through the cap beam 10 and the stopper 30 and cooperates with the nut 420 to fix the stopper 30 to the cap beam 10. The sleeve 430 is sleeved on the bolt 410, and the double torsion spring 440 is sleeved on the sleeve 430. The double torsion spring 440 is located in the accommodating cavity 310. The two spiral arms of the double torsion spring 440 are respectively connected to the inner wall of the accommodating cavity 310. The stopper 30 can rotate relative to the sleeve 430 and can slide relative to the cap beam 10; the lateral reset assembly 50 includes a first elastic reset member 510, one end of which is connected to the stopper 30, and the other end of the first elastic reset member 510 is used to connect to the main beam 20.

[0032] The sliding block with adaptive torsion provided by the present invention can consume earthquake energy by means of the friction between the block 30 and the cap beam 10, and can also consume earthquake energy by means of the torsional reset assembly 40 and the lateral reset assembly 50 while resetting the main beam 20 and the block 30, and has the advantages of being repairable and easy to replace after an earthquake.

[0033] Specifically, after the earthquake, the damage of the block 30 is checked. If the damage of the block 30 exceeds the set limit, a new block 30 can be replaced. When the block 30 is replaced, only the nut 420 needs to be unscrewed, and the bolt 410, sleeve 430, double torsion spring 440 and other components need to be removed. At this time, the damage of the bolt 410, sleeve 430, double torsion spring 440 and other components can be further checked. If the damage of the bolt 410, sleeve 430, double torsion spring 440 and other components exceeds the set limit (such as yielding or even damage), the above components can be replaced. For example, when the bolt 410 and sleeve 430 yield or even damage, a new bolt 410 is replaced and the sleeve 430 is re-installed, and then the bolt 410 and sleeve 430 are inserted into the block 30 and the cap beam 10, and prestress is applied to them through the cooperation of the nut 420 and the bolt 410. If the damage of the first elastic reset member 510 exceeds a set limit, the two ends of the first elastic reset member 510 can be removed from the stopper 30 and the main beam 20 respectively, and a new first elastic reset member 510 can be replaced.

[0034] See also Figure 1As shown, according to some embodiments of the present invention, the lateral reset assembly 50 also includes two second elastic reset members 520, the cap beam 10 is provided with a sliding groove 110 along the lateral direction for the sleeve 430 to slide laterally, and the two second elastic reset members 520 are respectively arranged on opposite sides of the sleeve 430 along the lateral direction.

[0035] By arranging the second elastic reset member 520 on the opposite sides of the sleeve 430 in the horizontal direction, and arranging the sliding groove 110 on the cap beam 10 for the bolt 410 and the sleeve 430 to slide horizontally, when the earthquake intensity is large, the main beam 20 collides with the block 30, the block 30, the screw and the sleeve 430 can slide horizontally, and the friction between the block 30 and the cap beam 10 can absorb part of the earthquake energy, and the second elastic reset member 520 can be squeezed and deformed with the inner wall of the sliding groove 110 as the block 30, the screw and the sleeve 430 slide horizontally, thereby consuming part of the earthquake energy.

[0036] When the second elastic reset member 520 does not exceed its elastic deformation capacity, under the action of the elastic restoring force of the second elastic reset member 520, the block 30 can be restored to the initial position in the transverse direction of the bridge through the sleeve 430 and the bolt 410 to achieve reset; when the second elastic reset member 520 exceeds its elastic deformation capacity, it can also absorb part of the seismic energy in the process of yield failure, and protect the screw and the sleeve 430 to a certain extent.

[0037] See also Figure 1 As shown, according to some embodiments of the present invention, the second elastic return member 520 is a leaf spring (the leaf spring is formed by stacking a plurality of steel plates of unequal length and unequal curvature, and is a flexible sacrificial component).

[0038] By setting the second elastic reset member 520 as a leaf spring, the energy absorption efficiency of the system can be improved, and its elastic reset function can be effectively exerted when an earthquake occurs. The leaf spring has good elastic recovery characteristics and can generate sufficient restoring force under the action of an earthquake, so that the stopper 30 can be smoothly reset. In addition, when the earthquake force is large, the leaf spring can absorb part of the energy through deformation, thereby reducing the impact and protecting other key components (such as the screw, sleeve 430, etc.).

[0039] Specifically, when the leaf spring does not exceed its elastic deformation capacity, the elastic restoring force can make the block 30, the screw rod and the sleeve 430 return to their initial positions laterally. When the leaf spring deformation exceeds its elastic limit, the yield failure of the spring will further absorb the seismic energy, reduce the impact on other components of the system, and provide protection for the screw rod and the sleeve 430 to a certain extent, thereby improving the safety and earthquake resistance of the overall structure.

[0040] According to some embodiments of the present invention, the sleeve 430 includes a first barrel section 431 and a second barrel section 432 that are connected to each other, the first barrel section 431 is passed through the cap beam 10, and the second barrel section 432 is passed through the stop block 30; the first barrel section 431 is a rectangular barrel section, the second barrel section 432 is a circular barrel section, the leaf spring is arranged on the outer wall of the rectangular barrel section, and the double torsion spring 440 is sleeved on the circular barrel section.

[0041] By configuring the sleeve 430 as a first barrel section 431 (rectangular barrel section) and a second barrel section 432 (circular barrel section) that are connected to each other, the planar outer walls of the first barrel section 431 and the second barrel section 432 can be used to provide an installation position for the leaf spring, thereby facilitating the installation of the leaf spring, and the second barrel section 432 can be used to fit and fix the double torsion spring 440, thereby facilitating the installation of the double torsion spring 440.

[0042] Specifically, the leaf spring can be disposed on the outer wall of the first barrel section 431 by welding, the double torsion spring 440 is sleeved on the second barrel section 432 , and both ends of the double torsion spring 440 are welded to the second barrel section 432 .

[0043] See also Figure 3 As shown, according to some embodiments of the present invention, a connecting plate 450 is provided on the spiral arm of the double torsion spring 440 , and a stiffening rib 460 is provided between the connecting plate 450 and the inner wall of the accommodating cavity 310 .

[0044] By arranging a connecting plate 450 on the spiral arm of the double torsion spring 440 and arranging a stiffening rib 460 between the connecting plate 450 and the inner wall of the accommodating cavity 310, the connecting plate 450 and the stiffening rib 460 can be used to connect the spiral arm of the double torsion spring 440 to the inner wall of the accommodating cavity 310, so that the torsional force of the double torsion spring 440 is transmitted to the stopper 30 through the connecting plate 450 and the stiffening rib 460. Specifically, for a curved bridge, under an E2 earthquake, the stiffening rib 460 can rotate around the sleeve 430 following the torsion of the stopper 30, thereby driving the double torsion spring 440 to torsion deformation. In this process, if the earthquake energy is large, the stiffening rib 460 can also torsion deformation and consume part of the earthquake energy, thereby reducing the probability or degree of damage to the stopper 30 and the main beam 20.

[0045] Specifically, the connecting plate 450 can be connected to the double torsion spring 440 by using a rivet pin.

[0046] See also Figure 1 As shown, according to some embodiments of the present invention, the first elastic reset member 510 is an SMA spring assembly, and the SMA spring assembly is connected to the stopper 30 and the main beam 20 via a spring clamp (not shown in the figure).

[0047] Specifically, the SMA spring assembly includes a plurality of SMA springs, and the plurality of SMA springs are evenly arranged between the main beam 20 and the stopper 30 .

[0048] The advantage of using an SMA spring group in the first elastic reset member 510 is that the SMA spring can automatically return to a preset shape after an earthquake or external force, has excellent self-recovery, and can ensure that the main beam 20 is quickly reset when the deformation capacity of the SMA spring is not exceeded. Its shape memory characteristics give it a strong energy absorption capacity, effectively absorbing and storing earthquake energy through a phase change process, and reducing vibration. In addition, compared with traditional metal springs, SMA springs have stronger fatigue resistance and can maintain a long service life during multiple loadings. In addition, by connecting the SMA spring group to the block 30 and the main beam 20 through a spring chuck, it can be easily disassembled and assembled. After the earthquake, when the SMA spring group is detected to be damaged, the spring chuck can be loosened and replaced with a new SMA spring group.

[0049] The connection structure provided by the present invention is described below. The connection structure described below and the sliding stopper with torsion adaptability described above can correspond to each other.

[0050] See also Figures 2 to 4 As shown, the connection structure provided by the embodiment of the present invention includes a cap beam 10 and a sliding stopper with torsion adaptability as described in any of the above embodiments, the stopper 30 is arranged between the cap beam 10 and the main beam 20, the stopper 30 is located on the outside of the main beam 20, the bolt 410 is passed through the cap beam 10 and the stopper 30 and cooperates with the nut 420 to fix the stopper 30 to the cap beam 10, one end of the first elastic reset member 510 is connected to the stopper 30, and the other end of the first elastic reset member 510 is used to connect to the main beam 20.

[0051] The connection structure provided by the present invention adopts the above-mentioned sliding block with adaptable torsion. Therefore, it is possible to consume earthquake energy by utilizing the friction between the block 30 and the cap beam 10, and it is also possible to consume earthquake energy by using the torsional reset assembly 40 and the lateral reset assembly 50 while resetting the main beam 20 and the block 30, and it has the advantages of being repairable and easy to replace after an earthquake.

[0052] See also Figure 2 As shown, according to some embodiments of the present invention, a gap is provided between the leaf spring and the inner wall on the opposite side of the sliding groove 110 .

[0053] By setting a gap between the leaf spring and the inner wall on the opposite side of the sliding groove 110, the effect of multi-level energy absorption and gradual shock absorption can be achieved. During an earthquake, the block 30 first slides laterally and consumes part of the seismic energy through the friction between the cap beam 10. When the friction energy consumption reaches a certain level, the block 30 continues to slide, and finally the leaf spring contacts the inner wall of the sliding groove 110, further absorbing the remaining seismic energy. First, the friction between the block 30 and the cap beam 10 absorbs part of the energy, and the contact between the leaf spring and the inner wall of the sliding groove 110 further disperses the energy and reduces the impact of a single component; secondly, setting a gap can prevent the leaf spring from entering the yield stage too early, so that it absorbs energy under relatively mild conditions, thereby reducing the frequency of replacement and extending the service life. In general, this design not only improves the overall seismic performance through a multi-level energy absorption mechanism, but also effectively protects key components and prevents damage to the leaf spring due to excessive energy concentration.

[0054] According to some embodiments of the present invention, a friction surface is provided on the top surface of the cap beam 10 for increasing the friction force with the stopper 30 .

[0055] By setting a friction surface on the top surface of the cap beam 10, the friction between the bottom surface of the block 30 and the top surface of the cap beam 10 can be increased, and more seismic energy can be absorbed when the block 30 slips laterally or torsionally relative to the cap beam 10. The friction surface increases the friction coefficient of the contact surface, delays or reduces the sliding speed of the block 30, makes the energy absorption process smoother and more durable, helps to reduce the impact of earthquakes on the structure, and improves the seismic performance of the system. At the same time, the increase in friction can also better protect other key components and reduce damage caused by excessive seismic forces, thereby enhancing the stability and durability of the overall structure.

[0056] Specifically, a corresponding area on the top surface of the cap beam 10 may be roughened to form the above-mentioned friction surface.

[0057] See also Figure 2 As shown, according to some embodiments of the present invention, a gasket 470 is provided between the nut 420 and the bottom surface of the cap beam 10 .

[0058] By providing a pad 470 between the nut 420 and the bottom surface of the cap beam 10, the stability and reliability of the bolt 410 nut 420 assembly fixing the stopper 30 can be effectively improved. The pad 470 can evenly distribute the pressure applied by the nut 420 to avoid damage to the cap beam 10 or the nut 420 due to excessive local stress.

[0059] The following is an explanation of the construction process of the sliding stopper with torsion adaptability and its connection structure provided by the present invention. Figures 1 to 4 shown.

[0060] Construction of cap beam 10: Support formwork and tie steel bars according to design drawings, reserve sliding groove 110 at corresponding positions, and ensure that the length of sliding groove 110 meets design requirements. Then, pour concrete of cap beam 10, and after the concrete strength reaches the design requirements, roughen the sliding surface to form a friction surface, thereby increasing friction.

[0061] Installation of the connecting plate 450 and the stiffening rib 460: According to the design requirements, the connecting plate 450 is fixed on the double torsion spring 440, and one end of the stiffening rib 460 is welded to the connecting steel plate, and the other end is welded to the inner wall of the accommodating cavity 310 of the stopper 30. Finally, anti-corrosion and anti-rust treatment is performed to ensure the durability of the components.

[0062] Installation of the SMA spring assembly: The SMA spring assembly (the first elastic reset member 510) and the spring chuck are treated with anti-corrosion and anti-rust treatment, and the two ends of the SMA spring assembly are respectively connected to the stopper 30 and the main beam 20 through the spring chuck to ensure the stability and function of the spring assembly.

[0063] Leaf spring assembly: According to the design drawings, a leaf spring (second elastic reset member 520) composed of a plurality of sheets of unequal length and unequal curvature is manufactured, and the double torsion spring 440 and both ends of the leaf spring are respectively welded to the second barrel section 432 (circular barrel section) and the first barrel section 431 (rectangular barrel section) of the sleeve 430. All components are treated with anti-corrosion and anti-rust.

[0064] Bolt 410 nut 420 assembly installation and prestressing: According to the design requirements, the bolt 410 is passed through the block 30, the cap beam 10 and the pad 470 in sequence, and the nut 420 is tightened. By further tightening the nut 420 to apply prestressing, the tightness of the bolt 410 is ensured, and the stability of the block 30 in the initial state is ensured.

[0065] The specific application scenarios of the sliding stopper with torsion adaptability provided by the present invention are described below. Figures 1 to 4 shown.

[0066] For conventional straight bridges, under the action of E1 earthquake, when the block 30 collides with the main beam 20, due to the prestress applied by the bolts 410 and the nuts 420, the friction between the block 30 and the cap beam 10 is greater than the lateral seismic response of the main beam 20, so no friction slip occurs between the block 30 and the cap beam 10. In this case, the block 30 can effectively limit the lateral displacement of the main beam 20. At this time, the collision effect between the block 30 and the main beam 20 is resisted by the strength of the block 30 itself. After the earthquake, the vibration characteristics of the structure and the SMA spring group in an elastic state work together to help the main beam 20 return to its initial position and exert a self-reset function.

[0067] Under the action of the E2 earthquake, when the lateral seismic response of the main beam 20 exceeds the friction force between the stopper 30 and the cap beam 10, the SMA spring group on one side of the moving direction of the main beam 20 will be compressed and deformed, while the other side will be elongated. At this time, friction slip will occur between the stopper 30 and the cap beam 10. Friction slip not only helps to consume a large amount of seismic energy, but also reduces the collision effect between the stopper 30 and the main beam 20, thereby protecting the stopper 30 from excessive damage. At the same time, the SMA spring group and the leaf spring in the elastic state can also play a certain role in resetting the main beam 20 and its connecting parts (such as bolts 410 and sleeves 430).

[0068] As the lateral seismic response of the main beam 20 increases, the lateral displacement of the stopper 30 and the main beam 20 also increases. When the displacement exceeds the maximum deformation capacity of the SMA spring group and the leaf spring, these springs will fail, causing the bolt 410 and the sleeve 430 to deform or even yield. In this process, although these components have deformed or yielded, they can still continue to consume part of the seismic energy, which helps to mitigate the vibration response of the system.

[0069] For curved bridges, under an E1 earthquake, the friction between the stopper 30 and the cap beam 10 is greater than the lateral seismic response of the main beam 20. Therefore, when the stopper 30 collides with the main beam 20, no friction slip occurs between the stopper 30 and the cap beam 10. At this time, the stopper 30 can not only limit the lateral displacement of the main beam 20, but also effectively limit the torsion of the main beam 20. At the same time, the SMA spring group in an elastic state can help the main beam 20 return to its initial position. In this process, the collision effect between the stopper 30 and the main beam 20 is resisted by the strength of the stopper 30 itself.

[0070] Under the E2 earthquake, when the lateral seismic response of the main beam 20 exceeds the friction between the stopper 30 and the cap beam 10, the stopper 30 will not only slip laterally, but also twist around the sleeve 430 due to the action of the main beam 20 and the SMA spring group, thereby adapting to the torsional deformation of the main beam 20. In this case, the stopper 30 can effectively limit the lateral displacement and torsional displacement of the main beam 20. During the lateral slip and torsional process of the stopper 30, the stopper 30 undergoes friction slip (including lateral slip and torsional slip) relative to the cap beam 10, thereby consuming a large amount of seismic energy.

[0071] In addition, as the stopper 30 is twisted, the stiffening rib 460 rotates around the sleeve 430, causing the double torsion spring 440 to be twisted and deformed. At the same time, when the stopper 30 slides laterally, the leaf spring is squeezed against the inner wall of the sliding groove 110, causing the leaf spring to deform. These deformations (including the rotation of the stiffening rib 460, the twisting deformation of the double torsion spring 440, and the deformation of the leaf spring) help to consume part of the seismic energy.

[0072] After the earthquake, if the double torsion spring 440, the SMA spring group and the leaf spring have not yielded, they will play a restorative role: the torsion force of the double torsion spring 440 can cause the stopper 30 to return to its original state in the torsion direction, the restoring force of the leaf spring can cause the stopper 30 to return to its original position in the lateral direction, and the SMA spring group can provide support for the reset of the main beam 20. If the double torsion spring 440, the SMA spring group and the leaf spring yield, the stopper 30 will not be able to return to its original state in the lateral and torsion directions, and the main beam 20 will not be able to be fully reset. However, even if these components yield, they will still absorb part of the earthquake energy during the yielding process, thereby providing a certain degree of protection for the stopper 30 and the main beam 20.

[0073] It should be noted that E1 earthquakes and E2 earthquakes are usually used to represent earthquakes of different intensities. E1 earthquakes usually refer to earthquakes of small to moderate intensity, representing common earthquake effects, and are considered to have little impact on structures during design; while E2 earthquakes represent rare or extremely rare earthquakes, which may have a significant impact on structures and are usually used to evaluate the response of structures under extreme earthquake conditions.

[0074] 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 sliding stopper capable of adapting to torsion, characterized in that: include: Stops, torsional return assemblies, and lateral return assemblies; The stopper is arranged on the cap beam, the stopper is located on the outside of the main beam, and a receiving cavity is arranged in the stopper; The torsion reset assembly comprises a bolt, a nut, a sleeve and a double torsion spring. The bolt is passed through the cap beam and the stopper and cooperates with the nut to fix the stopper to the cap beam. The sleeve is sleeved on the bolt. The double torsion spring is sleeved on the sleeve. The double torsion spring is located in the accommodating cavity. Two spiral arms of the double torsion spring are respectively connected to the inner wall of the accommodating cavity. The stopper can rotate relative to the sleeve and can slide relative to the cap beam. The lateral reset assembly includes a first elastic reset member, one end of which is connected to the stopper, and the other end of which is used to be connected to the main beam.

2. The torsion-adaptable sliding stopper according to claim 1, characterized in that: The lateral resetting assembly further comprises two second elastic resetting members, and the two second elastic resetting members are respectively arranged on opposite sides of the sleeve along the lateral direction.

3. The torsion-adaptable sliding stopper according to claim 2, characterized in that: The second elastic reset member is a leaf spring.

4. The torsion-adaptable sliding stopper according to claim 3, characterized in that: The sleeve comprises a first barrel section and a second barrel section connected to each other, the first barrel section is passed through the cap beam, and the second barrel section is passed through the stopper; The first barrel section is a rectangular barrel section, the second barrel section is a circular barrel section, the leaf spring is arranged on the outer wall of the rectangular barrel section, and the double torsion spring is sleeved on the circular barrel section.

5. The torsion-adaptable sliding stopper according to any one of claims 1 to 4, characterized in that: A connecting plate is provided on the spiral arm of the double torsion spring, and a stiffening rib is provided between the connecting plate and the inner wall of the accommodating cavity.

6. The torsion-adaptable sliding stopper according to any one of claims 1 to 4, characterized in that: The first elastic reset member is an SMA spring group, and the SMA spring group is connected to the stopper and the main beam through a spring clamp.

7. A connection structure, characterized in that: It includes a cap beam and a sliding stopper with torsion adaptability as described in any one of claims 1 to 6, wherein the stopper is arranged between the cap beam and the main beam, the stopper is located on the outside of the main beam, the bolt passes through the cap beam and the stopper and cooperates with the nut to fix the stopper to the cap beam, one end of the first elastic return member is connected to the stopper, and the other end of the first elastic return member is used to connect to the main beam.

8. The connection structure according to claim 7, characterized in that: A gap is provided between the leaf spring and the inner wall on the opposite side of the sliding groove.

9. The connection structure according to claim 7, characterized in that: The top surface of the cap beam is provided with a friction surface for increasing the friction force between the cap beam and the stopper.

10. The connection structure according to claim 7, characterized in that: A pad is provided between the nut and the bottom surface of the cap beam.

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