Three-dimensional self-resetting seismic mitigation bridge support and working method thereof

Abstract

The application discloses a three-dimensional self-resetting shock-reducing and -isolating bridge support and a working method thereof, which comprises an upper support plate and a lower support plate; a center sliding block is arranged between the upper support plate and the lower support plate, one end of the center sliding block is in abutment with the bottom end of the upper support plate, and the end of the center sliding block away from the upper support plate is in abutment with the lower support plate; the center sliding block is used for reducing the vibration of a bridge structure in the horizontal and vertical directions; a self-resetting unit is arranged between the upper support plate and the lower support plate, one end of the self-resetting unit is connected with the bottom end of the upper support plate, and the end of the self-resetting unit away from the upper support plate is connected with the top end of the lower support plate; the self-resetting unit is used for post-seismic resetting of the bridge structure. The application can not only simultaneously provide the shock-reducing and -isolating function in the horizontal and vertical directions, effectively reducing the impact of earthquakes on the bridge structure, but also can make corresponding responses and adjustments according to different levels of earthquake actions; and the problem of insufficient self-adaptive capacity of traditional supports is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge engineering, and particularly relates to a three-dimensional self-resetting seismic mitigation bridge support and a working method thereof. BACKGROUND

[0002] As a major lifeline project, once the bridge is interrupted due to earthquake damage, it will seriously affect the social production and life practice such as earthquake relief and material transportation. Seismic mitigation technology is one of the main means to improve the seismic performance of bridges at present, which reduces the seismic response of the structure by prolonging the natural period of vibration of the structure. The sliding friction isolation device has been widely used in building structures and bridge structures due to its excellent stability, durability and self-resetting characteristics. The friction pendulum bearing is a kind of seismic mitigation technology that is widely used at present, which reduces the impact of earthquakes on bridge structures by using the principle of swinging and friction energy dissipation. The advantages of this kind of bearing are simple structure, good energy dissipation effect, and can adapt to different seismic intensity within a certain range. Although traditional seismic mitigation bearings such as friction pendulum bearings have been widely used in bridge isolation at home and abroad, there are still problems such as large residual displacement, high bottom shear and insufficient limiting capacity under the action of seismic motion. At the same time, since the friction pendulum bearing mainly plays a role in the horizontal direction, it has obvious shortcomings in vertical seismic mitigation and self-resetting capacity. With the development of social economy, scholars in various countries gradually realize the importance of post-earthquake residual displacement and functional recovery as an index of seismic design. As the main concept and goal of bridge resilience at this stage, effectively controlling the seismic damage of bridge structures, reducing or even eliminating residual displacement, and shortening the functional recovery time after seismic damage, improving the resilience of bridges after strong earthquakes, have gradually become the focus of new generation of structural seismic research, and the self-resetting of bridge bearings is one of the main ways to realize functional recovery.

[0003] The existing bridge seismic mitigation bearing technology usually only designs for horizontal or vertical seismic mitigation requirements, and cannot provide seismic mitigation function in three-dimensional space at the same time. This single-directional seismic mitigation design cannot effectively cope with multi-dimensional vibration in complex seismic environment, resulting in that the bridge may still be severely damaged under strong earthquake action. At the same time, the existing bridge seismic mitigation bearing cannot automatically recover to the original position after the earthquake, especially under strong earthquake action, these bearings may produce large residual displacement, resulting in permanent deformation of the bridge structure, which not only affects the use function, but also affects the rapid recoverability of the bridge after the earthquake, and increases the maintenance cost. The current bridge seismic mitigation bearing technology is mostly designed independently, and lacks the organic combination of different seismic mitigation and self-resetting technologies. This scattered design leads to weak overall performance of the bearing system, and cannot provide comprehensive protection under complex seismic conditions.

[0004] Therefore, it is urgent for those skilled in the art to design a three-dimensional self-resetting seismic mitigation bridge support. SUMMARY

[0005] The present application aims to provide a three-dimensional self-resetting seismic mitigation bridge support and a working method thereof, thereby solving the aforementioned problems in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0007] A three-dimensional self-resetting seismic mitigation bridge support comprises an upper support plate and a lower support plate.

[0008] A central slider is arranged between the upper support plate and the lower support plate, one end of the central slider is in abutment with the bottom end of the upper support plate, and the end of the central slider away from the upper support plate is in abutment with the lower support plate; the central slider is used to reduce the horizontal and vertical vibrations of the bridge structure.

[0009] Four self-resetting units are arranged around the central slider, the axis of the self-resetting unit is perpendicular to the axis of the central slider; one end of the self-resetting unit is connected to the bottom end of the upper support plate, and the end of the self-resetting unit away from the upper support plate is connected to the top end of the lower support plate; the self-resetting unit is used for post-seismic reset of the bridge structure.

[0010] In some embodiments, the end of the upper support plate near the central slider is provided with a first central sliding area; the end of the lower support plate near the central slider is provided with a second central sliding area.

[0011] A first convex curved surface is arranged in the first central sliding area.

[0012] A second convex curved surface is arranged in the second central sliding area.

[0013] The first convex curved surface and the second convex curved surface are coated with a sliding friction coating.

[0014] In some embodiments, the central slider comprises: an upper spherical cap body, a first concave curved surface is arranged at the top end of the upper spherical cap body, and the first concave curved surface is in abutment with the first convex curved surface.

[0015] A first recess is formed at the end of the upper spherical cap body away from the first concave curved surface.

[0016] A lower spherical cap body, a second concave curved surface is arranged at the bottom end of the lower spherical cap body, and the second concave curved surface is in abutment with the second convex curved surface.

[0017] A second recess is formed at the end of the lower spherical cap body away from the second convex curved surface.

[0018] The end of the lower spherical cap body away from the second convex curved surface is arranged in the first recess of the upper spherical cap body.

[0019] In some embodiments, the central slider further comprises:

[0020] A center guide cylinder is arranged in the first groove of the upper spherical crown body, and a top end of the center guide cylinder abuts against a top wall of the first groove; an end of the center guide cylinder away from the upper spherical crown body extends into the second groove of the lower spherical crown body;

[0021] A disc spring group is arranged around an outer wall of the center guide cylinder.

[0022] In some specific embodiments, the self-resetting unit comprises:

[0023] The support hinge seats are multiple;

[0024] The first, second, third and fourth support hinge seats are arranged at one end of the upper support plate close to the center guide cylinder and are fixedly connected to the upper support plate; the first, second, third and fourth support hinge seats are arranged in a parallelogram shape;

[0025] The first, second, third and fourth support hinge seats are provided with pin holes at an end away from the upper support plate;

[0026] The fifth, sixth, seventh and eighth support hinge seats are arranged at one end of the lower support plate close to the center guide cylinder and are fixedly connected to the lower support plate; the fifth, sixth, seventh and eighth support hinge seats are arranged in a parallelogram shape;

[0027] The fifth, sixth, seventh and eighth support hinge seats are provided with pin holes at an end away from the lower support plate.

[0028] In some specific embodiments, the self-resetting unit further comprises:

[0029] The friction assemblies are multiple and are arranged between the upper support plate and the lower support plate; one end of the first friction assembly is connected to the first support hinge seat, and an end away from the first support hinge seat is connected to the fifth support hinge seat;

[0030] One end of the second friction assembly is connected to the second support hinge seat, and an end away from the second support hinge seat is connected to the sixth support hinge seat;

[0031] One end of the third friction assembly is connected to the third support hinge seat, and an end away from the third support hinge seat is connected to the seventh support hinge seat;

[0032] One end of the fourth friction assembly is connected to the fourth support hinge seat, and an end away from the fourth support hinge seat is connected to the eighth support hinge seat.

[0033] In some specific embodiments, the friction assemblies comprise:

[0034] The inner core is in a plurality of spindle shapes, and one end of the inner core is provided with a connecting lug, and the connecting lug is provided with a connecting hole matched with the pin hole;

[0035] The end of the inner core with the connecting hole is connected with the end of the support hinged seat with the pin hole;

[0036] The center sleeve is arranged between the first inner core and the second inner core, one end of the center sleeve is sleeved on the end of the first inner core away from the connecting lug, and the end away from the first inner core is sleeved on the end of the second inner core away from the connecting lug;

[0037] The side of the center sleeve close to the inner core is provided with a slot, the shape of the slot corresponds to the shape of the inner core, and the axis of the center sleeve is the same as the axis of the inner core;

[0038] The inner surface of the slot of the center sleeve and the outer surface of the inner core are coated with sliding friction coating;

[0039] The end plate is arranged between the connecting lug and the inner core, one end of the end plate is fixedly connected with the connecting lug, and the end away from the connecting lug is fixedly connected with the end of the inner core away from the center sleeve.

[0040] In some specific embodiments, the self-resetting unit further comprises:

[0041] The outer sleeve is sleeved on the outer side of the center sleeve along the length direction of the center sleeve, and is used for providing pre-pressure for the center sleeve.

[0042] In some specific embodiments, the outer sleeve is made of shape memory alloy;

[0043] The sliding friction coating is polytetrafluoroethylene, polyether ketone, polyimide or polycarbonate.

[0044] A working method of a three-dimensional self-resetting seismic mitigation bridge support based on the same concept, comprising the following steps:

[0045] S100, first, accurately install all components of the support in a predetermined order and combination;

[0046] S200, after completing the installation of step S100, check the whole system to ensure that the connection between the components is tight, the sliding area is unobstructed, and the pre-tightening force of the disc spring set and the outer sleeve meets the design requirements;

[0047] S300, put into use, fix the upper support plate to the upper structure of the bridge, and fix the lower support plate to the foundation at the bottom of the bridge; when the bridge vibrates, the horizontal displacement of the bridge causes the relative displacement of the upper support plate and the lower support plate, the first convex curved surface of the upper support plate and the first concave curved surface of the upper spherical crown body contact surface produce relative sliding, the second convex curved surface of the lower support plate and the second concave curved surface of the lower spherical crown body contact surface produce relative sliding, and the friction force is generated to dissipate the seismic energy.

[0048] S400, the energy consumption of the horizontal direction is reset to the inner core along the center sleeve inside the sliding, the friction between the inner core and the center sleeve dissipates part of the energy; at the same time, the outer sleeve of the outer layer is subjected to radial extrusion and deformation; and the extrusion of the inner core is generated by the super-elastic effect or self-recovery characteristics of the shape memory alloy, the self-resetting restoring force is generated, the inner core is returned to the initial position, and the horizontal self-resetting function is completed;

[0049] S500, the disc spring group reduces and resets: under the action of vertical load and seismic load, the disc spring group absorbs and dissipates seismic energy by elastic compression deformation, plays a role of seismic reduction and isolation; when the seismic load disappears, the disc spring group restores to the original state by using the stored elastic energy, realizes the self-resetting in the vertical direction;

[0050] S600, the cooperation of shock absorption and self-resetting: the horizontal friction pendulum reduces the seismic response through the negative stiffness effect, the self-resetting unit provides the horizontal self-resetting function, and the vertical disc spring group ensures the vertical shock absorption and resetting; the system as a whole forms comprehensive control of multi-dimensional response to earthquake through the combined action of various structures.

[0051] The beneficial effects of the present application are: the present application discloses a three-dimensional self-resetting seismic reduction and isolation bridge support, which comprises an upper support plate and a lower support plate; a center sliding block is arranged between the upper support plate and the lower support plate, one end of the center sliding block abuts against the bottom end of the upper support plate, and the end of the center sliding block away from the upper support plate abuts against the lower support plate; the center sliding block is used for reducing the horizontal and vertical vibration of the bridge structure; a self-resetting unit is arranged between the upper support plate and the lower support plate, one end of the self-resetting unit is connected with the bottom end of the upper support plate, and the end of the self-resetting unit away from the upper support plate is connected with the top end of the lower support plate; the self-resetting unit is used for post-earthquake resetting of the bridge structure.

[0052] The present application can simultaneously provide seismic reduction and isolation function in horizontal and vertical directions, effectively reduce the impact of earthquake on the bridge structure, protect the overall stability of the bridge, and solve the problem that the traditional bridge seismic reduction and isolation support can only provide seismic reduction and isolation capacity in a single direction and cannot comprehensively cope with complex earthquake action.

[0053] The present application provides self-resetting force through shape memory alloy and disc spring device, has excellent self-resetting capacity after earthquake, can automatically recover to the initial state in horizontal and vertical directions, ensures the continuous use performance and safety of the bridge, and solves the defect that the traditional seismic reduction and isolation support is difficult to recover to the original position after earthquake and needs manual repair.

[0054] The application has excellent adaptive capacity, can respond and adjust according to different levels of seismic action, and realizes reasonable fortification under multi-level seismic action. This adaptive characteristic can not only improve the seismic performance of the bridge, but also make it more cost-effective and structurally safe, solves the problem that the traditional support has insufficient adaptive capacity and cannot effectively respond to different intensity earthquakes, and significantly improves the safety of the bridge under different seismic fortification targets. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 is a structural schematic diagram of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0056] Figure 2 is a front view of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0057] Figure 3 is a left view of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0058] Figure 4 is a sectional structural schematic diagram of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0059] Figure 5 is a structural schematic diagram of an upper support plate of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0060] Figure 6 is a structural schematic diagram of a lower support plate of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0061] Figure 7 is a top view of a lower support plate of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0062] Figure 8 is a structural schematic diagram of a middle sliding block of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0063] Figure 9 is a sectional structural schematic diagram of a middle sliding block of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0064] Figure 10 is a structural schematic diagram of a self-resetting unit of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0065] Figure 11 is a structural sectional schematic diagram of a self-resetting unit of a three-dimensional self-resetting seismic mitigation bridge support of the application;

[0066] Figure 12 is a three-dimensional self-resetting seismic mitigation bridge support working flowchart of the application;

[0067] Figure 13 ABAQUS low cycle reciprocating simulation result diagram for the common friction pendulum bearing;

[0068] Figure 14 ABAQUS low cycle reciprocating simulation result diagram for the three-dimensional self-resetting seismic mitigation bridge bearing of the application.

[0069] In the drawings, 1 is an upper bearing plate; 11 is a first central sliding area; 2 is a lower bearing plate; 21 is a second central sliding area; 3 is an upper spherical crown body; 4 is a lower spherical crown body; 5 is a disc spring group; 6 is a central guide cylinder; 7 is a self-resetting unit; 71 is an inner core; 72 is a central sleeve; 73 is an outer sleeve; 74 is a high-strength bolt; 75 is an end plate; 76 is a connecting lug; 81 is a first bearing hinge seat; 82 is a second bearing hinge seat; 83 is a third bearing hinge seat; 84 is a fourth bearing hinge seat; 85 is a fifth bearing hinge seat; 86 is a sixth bearing hinge seat; 87 is a seventh bearing hinge seat; 88 is an eighth bearing hinge seat; 9 is a pin. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical scheme and advantages of the application clearer and more apparent, the application will be further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are merely intended to explain the application and not to limit the application.

[0071] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 A three-dimensional self-resetting seismic mitigation bridge bearing is shown in the drawings, which comprises an upper bearing plate 1 and a lower bearing plate 2. A central sliding block is arranged between the upper bearing plate 1 and the lower bearing plate 2, one end of the central sliding block abuts the bottom end of the upper bearing plate, and the end of the central sliding block away from the upper bearing plate abuts the top end of the lower bearing plate 2. The central sliding block is used to reduce the horizontal and vertical vibrations of the bridge structure. Four self-resetting units 7 are arranged around the central sliding block, and the axis of the self-resetting unit 7 is perpendicular to the axis of the central sliding block. One end of the self-resetting unit 7 is connected to the bottom end of the upper bearing plate, and the end of the self-resetting unit 7 away from the upper bearing plate 1 is connected to the top end of the lower bearing plate 2. The self-resetting unit 7 is used for post-seismic reset of the bridge structure. It should be noted that the central sliding block is vertically arranged, and the self-resetting unit is horizontally arranged with the axis perpendicular to each other.

[0072] In the present embodiment, the invention integrates horizontal friction pendulum energy dissipation and isolation units based on the negative stiffness principle, shape memory alloy horizontal energy dissipation and self-centering units, and vertical disc spring self-centering and isolation units, providing comprehensive isolation and self-centering functions. The upper support plate 1 and the lower support plate 2 of the invention are respectively connected to the upper structure and the foundation of the bridge, responsible for bearing and transmitting the vertical load of the bridge. These upper support plates 1 and lower support plates are made of high-strength steel, with sufficient stiffness and strength to support the weight and traffic load of the bridge, and effectively disperse stress concentration areas. Under the action of earthquakes, the horizontal lateral swing and friction of the entire friction pendulum unit achieve the function of isolation and reduction.

[0073] In some specific embodiments, the upper support plate 1 is provided with a first central sliding area 11 near one end of the central sliding block. The lower support plate 2 is provided with a second central sliding area 21 near one end of the central sliding block.

[0074] A first convex curved surface is provided in the first central sliding area 11. A second convex curved surface is provided in the second central sliding area 21. The first convex curved surface and the second convex curved surface are coated with a sliding friction coating. It should be noted that the sliding friction coating used here can be polytetrafluoroethylene.

[0075] In some specific embodiments, the central sliding block includes an upper spherical cap body 3, the top end of the upper spherical cap body 3 is provided with a first concave curved surface, the first concave curved surface is in abutment with the first convex curved surface. The end of the upper spherical cap body 3 away from the first concave curved surface is provided with a first recess. A lower spherical cap body 4, the bottom end of the lower spherical cap body 4 is provided with a second concave curved surface, the second concave curved surface is in abutment with the second convex curved surface. The end of the lower spherical cap body 4 away from the second convex curved surface is provided with a second recess. The end of the lower spherical cap body 4 away from the second convex curved surface is arranged in the first recess of the upper spherical cap body 3.

[0076] In the present embodiment, the first concave curved surface of the upper spherical cap body 3 and the second concave curved surface of the lower spherical cap body 4 are both coated with polytetrafluoroethylene sliding friction material. Through the horizontal sliding friction between the surface contact surfaces of the upper support plate 1 and the upper spherical cap body 3 and the lower support plate 2 and the lower spherical cap body 4, energy is dissipated, while providing a negative stiffness effect to reduce the seismic response of the bridge.

[0077] Friction energy dissipation principle: under the action of earthquakes, the horizontal displacement of the bridge causes the relative displacement of the upper support plate 1 and the lower support plate 2. It should be noted that the convex curved surface of the upper support plate 1 and the lower support plate 2 and the concave curved surface of the upper spherical cap body 3 and the lower spherical cap body 4 contact surface produce relative sliding, the contact surface is coated with polytetrafluoroethylene sliding friction material, this low friction material reduces the sliding resistance, but still provides enough friction to dissipate seismic energy. The size of the friction is proportional to the seismic force, which can effectively dissipate the energy transmitted to the bridge by the earthquake.

[0078] Negative stiffness effect: the friction pendulum bearing design realizes the negative stiffness effect through a specific curved surface shape, that is, providing smaller stiffness in the initial movement stage, allowing the structure to have larger displacement without generating significant reaction force, thereby reducing the structural response of the bridge under horizontal seismic load, and significantly reducing the seismic response of the bridge structure under large earthquake action, especially near-fault earthquake action, solving the problem of excessive structural internal force response of the traditional bearing under large earthquake action, and ensuring the safety of the bridge structure under different seismic demands.

[0079] In some embodiments, the center sliding block further comprises a center guide cylinder 6 arranged in the first groove of the upper spherical cap body 3, and the top end of the center guide cylinder 6 abuts against the top wall of the first groove. The end of the center guide cylinder 6 away from the upper spherical cap body 3 extends into the second groove of the lower spherical cap body 4. The disc spring group 5 is arranged around the outer wall of the center guide cylinder 6.

[0080] In this embodiment, through the elastic guide matching arrangement, the center guide cylinder 6 is arranged inside the upper spherical cap body 3, the disc spring group 5 can be installed in the slotted groove of the center sliding block spherical cap body in different combination forms, and is positioned through the center guide cylinder 6. Through the unique laminated structure, effective elastic support can be provided under the action of vertical load. The compression space is reserved between the lower end of the center guide cylinder 6 and the bottom of the slotted groove of the lower spherical cap body 4, so that the bearing has a certain deformation capacity in the vertical direction. Through the characteristics of the disc spring, the bearing can play a role in vertical seismic isolation when bearing vertical earthquake action, and realize self-resetting of the bearing in the vertical direction after the earthquake through the elastic restoring force.

[0081] It should be noted here that the disc spring group 5 can adopt different combination forms, and through different combination forms, different stiffness and elastic restoring force can be achieved, and the deformation capacity and bearing capacity of the bearing can be effectively adjusted to meet the seismic isolation and self-resetting requirements of the bridge bearing under various seismic load conditions.

[0082] The combination group of the disc spring group 5 mainly includes the following three cases:

[0083] (1) Laminated combination (parallel): Laminated combination refers to that multiple disc springs are directly laminated together without spacing between them. This combination form is the same as a single disc spring in terms of deformation, and all disc springs deform at the same time and the deformation amount is consistent. Therefore, the total deformation of the laminated combination is equal to the deformation amount of a single disc spring, and does not change with the increase of the number of disc springs. In the laminated combination, the stress capacity is equal to the bearing capacity of a single disc spring multiplied by the number of disc springs. Each disc spring simultaneously bears part of the total load, and the overall stress capacity is enhanced. This combination increases the total stiffness of the system, and is suitable for seismic isolation requirements in high load environment.

[0084] (2) Parallel combination (series): Parallel combination is to arrange the disc springs in face-to-face form with spacing between each other. This arrangement makes the total deformation equal to the deformation of a single disc spring multiplied by the number of disc springs, because the deformation of each disc spring can be added sequentially. This form can significantly increase the total deformation of the support and improve the flexibility of the system. For parallel combination, the bearing capacity is the same as that of a single disc spring, because the force of each disc spring is transmitted sequentially, and the overall stiffness will not be significantly improved with the increase of the number of disc springs. This combination form is suitable for occasions that require larger deformation without significantly increasing the bearing capacity.

[0085] (3) Mixed combination (stacking + parallel): Mixed combination combines the advantages of stacking and parallel. In this combination, the disc springs are first arranged in small groups in the form of stacking, and then these groups are arranged in the form of parallel. The total deformation is equal to the deformation of a single disc spring multiplied by the number of disc springs in parallel, that is, the stacking deformation of each group does not change, but the inter-group deformation of each parallel combination is added. The force characteristics of the mixed combination are the bearing capacity of a single disc spring multiplied by the number of stacked disc springs in each group, because in each stacking group, the disc springs are in parallel bearing. Therefore, the overall bearing capacity is enhanced with the increase of the number of stacked disc springs, while the total deformation is determined by the number of parallel combinations. Mixed combination provides a more flexible design method, which can increase the deformation while enhancing the bearing capacity, and is a combination form with excellent comprehensive performance.

[0086] Working principle of spring group:

[0087] · Elastic deformation and energy absorption: Under the action of seismic load, the disc spring group 5 absorbs and dissipates seismic energy through elastic deformation. In parallel combination, multiple disc springs are compressed simultaneously, which can quickly respond to large load impact; in series combination, disc springs deform gradually, extending the energy dissipation path and providing sustained damping effect.

[0088] · Self-resetting function: When the seismic load disappears, the disc spring group 5 uses its stored elastic potential energy to achieve self-resetting. The disc springs in parallel combination can quickly restore the initial state of the support due to their high stiffness; the disc springs in series combination provide a larger elastic displacement, which is suitable for slow resetting after a large amplitude deformation. The disc springs in mixed combination can balance these two effects, adjusting the resetting speed and resetting force according to actual needs.

[0089] · Durability and stability: The combination form of disc springs can achieve high durability and long-term stability through reasonable design. The disc springs have excellent elasticity and fatigue performance, and can withstand dynamic loads for a long time without failure. The mixed combination method can avoid the premature failure of single disc springs due to excessive stress, prolonging the service life of the entire support system.

[0090] By reasonably designing the combined form of the disc spring, the three-dimensional self-resetting seismic isolation bridge bearing system can provide effective vertical seismic isolation and self-resetting functions under different seismic intensities and complex load conditions, and ensure the stability and service life of the bridge in the earthquake.

[0091] In some embodiments, the self-resetting unit 7 includes a plurality of bearing hinge seats. The first bearing hinge seat 81, the second bearing hinge seat 82, the third bearing hinge seat 83, and the fourth bearing hinge seat 84 are arranged at one end of the upper bearing plate 1 near the central guide cylinder 6 and are fixedly connected to the upper bearing plate 1. The first bearing hinge seat 81, the second bearing hinge seat 82, the third bearing hinge seat 83, and the fourth bearing hinge seat 84 are arranged in a parallelogram shape. The first bearing hinge seat 81, the second bearing hinge seat 82, the third bearing hinge seat 83, and the fourth bearing hinge seat 84 are provided with pin holes at the end away from the upper bearing plate 1. The fifth bearing hinge seat 85, the sixth bearing hinge seat 86, the seventh bearing hinge seat 87, and the eighth bearing hinge seat 88 are arranged at one end of the lower bearing plate 2 near the central guide cylinder and are fixedly connected to the lower bearing plate 2. The fifth bearing hinge seat 85, the sixth bearing hinge seat 86, the seventh bearing hinge seat 87, and the eighth bearing hinge seat 88 are arranged in a parallelogram shape. The fifth bearing hinge seat 85, the sixth bearing hinge seat 86, the seventh bearing hinge seat 87, and the eighth bearing hinge seat 88 are provided with pin holes at the end away from the lower bearing plate 2. In some embodiments, the self-resetting unit 7 further includes a plurality of friction assemblies arranged between the upper bearing plate 1 and the lower bearing plate 2. One end of the first friction assembly is connected to the first bearing hinge seat 81, and the end away from the first bearing hinge seat 81 is connected to the fifth bearing hinge seat 85. One end of the second friction assembly is connected to the second bearing hinge seat 82, and the end away from the second bearing hinge seat 82 is connected to the sixth bearing hinge seat 86. One end of the third friction assembly is connected to the third bearing hinge seat 83, and the end away from the third bearing hinge seat 83 is connected to the seventh bearing hinge seat 87. One end of the fourth friction assembly is connected to the fourth bearing hinge seat 84, and the end away from the fourth bearing hinge seat 84 is connected to the eighth bearing hinge seat 88. It should be noted that the upper bearing plate 1 and the lower bearing plate 2 are arranged in parallel.

[0092] In this embodiment, the super-elasticity of the shape memory alloy: the shape memory alloy (SMA) has super-elasticity, that is, it can fully recover to its original state under a larger strain. This property is due to the martensitic phase transition of SMA under external force, and it returns to the austenitic phase when the external force disappears. This process can absorb and release a large amount of mechanical energy, providing the required self-resetting force.

[0093] Friction and self-resetting coordination: under the action of earthquake, the spindle-shaped inner core 71 slides along the inside of the center sleeve 72, and the friction between the spindle and the center sleeve 72 dissipates part of the energy. At the same time, due to the change of the gap between the inner core 71 and the quarter circular center sleeve of the sleeve, the outer sleeve 73 of the outer layer will be radially extruded and deformed. This deformation provides a counteracting force through the super-elastic properties of the SMA, prompting the spindle-shaped inner core 71 to return to the initial position, completing the horizontal self-resetting function. The whole process not only consumes energy and reduces the horizontal response of the bridge, but also uses the self-resetting properties of the SMA to restore the initial state of the system.

[0094] In some embodiments, the friction assembly includes the inner core 71, which is multiple and spindle-shaped. One end of the inner core 71 is provided with a connecting lug 76, and the connecting lug 76 is provided with a connecting hole matched with the pin hole. The end of the inner core 71 with the connecting hole is connected with the end of the support hinge seat with the pin hole. The center sleeve 72 is arranged between the first inner core 71 and the second inner core 71, one end of the center sleeve 72 is sleeved on the end of the first inner core 71 away from the connecting lug 76, and the end away from the first inner core 71 is sleeved on the end of the second inner core 71 away from the connecting lug 76. The side of the center sleeve 72 close to the inner core 71 is provided with a slot, and the shape of the slot corresponds to the shape of the inner core 71. The axis of the center sleeve 72 is the same as the axis of the inner core 71. The inner surface of the slot of the center sleeve 72 and the outer surface of the inner core 71 are coated with sliding friction paint. The end plate 75 is multiple and arranged between the connecting lug 76 and the inner core 71, one end of which is fixedly connected with the connecting lug 76, and the end away from the connecting lug 76 is fixedly connected with the end of the inner core 71 away from the center sleeve 72. The self-resetting unit 7 further includes a pin 9, and it is necessary to point out that the pin hole of the support hinge seat and the connecting lug 76 of the inner core 71 are fixedly connected together through the pin 9.

[0095] In the embodiment, the support sets a self-resetting unit 7 based on shape memory alloy energy dissipation in the horizontal direction, which includes a friction assembly and a self-resetting assembly, mainly including an inner core 71, a center sleeve 72, and an outer sleeve 73. The friction assembly is composed of a spindle-shaped inner core 71 and a center sleeve 72, which can provide additional energy dissipation capacity for the support under seismic action through friction energy dissipation. The axial horizontal center sleeve 72 is composed of four center sleeves 72 with a quarter of a circular cross-section on the outer surface, and the four quarter-circular center sleeves 72 are in smooth contact with each other and can be freely separated. The inner surface of the center sleeve 72 is slotted, and the slot shape corresponds to the spindle-shaped inner core 71. The spindle-shaped inner core 71 is coaxial with the whole center sleeve 72, and the inner surface of the center sleeve 72 and the outer surface of the spindle-shaped inner core 71 are coated with polytetrafluoroethylene sliding friction material. The spindle-shaped inner core 71 is provided with two left and right pairs, and the left and right spindle-shaped inner cores 71 leave a certain length of cylindrical gap inside the center sleeve 72. The spindle-shaped inner core 71 extends out of the end of the center sleeve 72 and is connected to the end plate 75. The two side end plates 75 of the left and right spindle-shaped inner cores 71 are provided with a connecting hinge structure, so that the horizontally arranged shape memory alloy energy dissipation self-resetting unit 7 is connected to the upper support plate 1 and the lower support plate 2 through the hinge, respectively. This design allows the support to have moderate displacement and rotation under the action of earthquake or other lateral loads.

[0096] In some embodiments, the self-resetting unit 7 also includes an outer sleeve 73, which is sleeved on the outside of the center sleeve 72 along the length direction of the center sleeve 72. It is used to provide pre-pressure for the center sleeve 72.

[0097] In some embodiments, the outer sleeve 73 is made of shape memory alloy. The sliding friction coating is polytetrafluoroethylene or polyether ketone or polyimide or polycarbonate.

[0098] In the embodiment, the self-resetting assembly comprises an outer sleeve 73 arranged along the axial length of the central sleeve 72, the end of the outer sleeve 73 is provided with an opening, and the outer sleeve 73 is connected by high-strength bolts 74. The outer sleeve 73 is connected by two semicylinders in the shape of circular arcs. The semicylinders are connected together by the openings at the beginning of the length direction of the semicylinders and the high-strength bolts 74 passing through the openings of the semicylinders. The outer sleeve 73 provides a pre-pressure for the central sleeve by being used to apply a pre-tightening force during assembly. Under the action of an earthquake, with the increase of the displacement of the upper support plate 1, the left and right spindle-shaped inner core 71 is driven to produce a relative displacement in the horizontal direction. The spindle-shaped inner core 71 produces a frictional sliding along the contact slope of the central sleeve. The spindle-shaped inner core 71 simultaneously produces a radial extrusion on the central sleeve in four directions, so that the gap between the four central sleeves increases, and the outermost shape memory alloy sleeve is extruded to produce a radial deformation. The required radial restoring force is provided by the super-elasticity of the shape memory alloy, and the spindle-shaped inner core 71 is driven to realize self-resetting in the horizontal direction.

[0099] A working method of a three-dimensional self-resetting seismic mitigation bridge support based on the same concept, comprising the following steps:

[0100] S100, first, all components of the support are accurately installed in a predetermined order and combination.

[0101] In this embodiment, the assembly process of the three-dimensional self-resetting seismic mitigation and isolation bridge bearing system is as follows: first, set the central guide cylinder 6 inside the upper spherical crown body 3, and install the disc spring set 5 in the slot of the spherical crown body according to the design requirements. The laminated structure of the disc spring set 5 needs to be installed in a predetermined order and combination to ensure that it can provide sufficient elastic support. After installation, check whether the positioning of the central guide cylinder 6 is accurate and whether the laminated structure of the disc spring set 5 is complete. Install the upper spherical crown body 3 and the lower spherical crown body 4 to the corresponding positions of the upper bearing plate 1 and the lower bearing plate 2 respectively. During installation, ensure that the concave curved surface of the spherical crown body faces the other party, and coat polytetrafluoroethylene sliding friction material on its surface. After installation, check whether the fit between the spherical crown body and the bearing plate is tight. Assemble the spindle-shaped inner core 71, the central sleeve 72 and the outer sleeve in turn. First, insert the spindle-shaped inner core 71 into the central sleeve 72, and ensure that it is coaxially aligned with the central sleeve 72, and the inner and outer surfaces are coated with polytetrafluoroethylene sliding friction material. Then, arrange the outer sleeve along the axial length of the central sleeve 72, set the opening at the end, and fix it with high-strength bolts 74. Apply appropriate pre-tightening force to ensure that the entire structure is tightly combined. After assembling the horizontal energy dissipation self-resetting unit 7, connect the two side ends of the spindle-shaped inner core 71 to the hinge structure of the bearing hinge seat of the upper bearing plate 1 and the lower bearing plate 2 respectively through the connecting ears 76 on the end plate 75. At this time, ensure that the hinge structure can rotate freely, check the fastening degree of the connection to ensure that there is no looseness. After completing the above steps, perform a full system check to ensure that the connections between the components are tight, the sliding area is unobstructed, and the pre-tightening force of the disc spring set 5 and the outer sleeve 73 meets the design requirements. Finally, perform necessary debugging and fine-tuning to ensure that the bearing system can work normally. The entire assembly process needs to be fully prefabricated and tested in the factory, and the installation accuracy of all components needs to be ensured during on-site assembly to achieve the expected seismic mitigation and isolation and self-resetting effect.

[0102] S200, after completing the installation of step S100, perform a full system check to ensure that the connections between the components are tight, the sliding area is unobstructed, and the pre-tightening force of the disc spring set 5 and the outer sleeve 73 meets the design requirements;

[0103] S300, put into use, fix the upper bearing plate 1 to the upper structure of the bridge, and fix the lower bearing plate 2 to the foundation at the bottom of the bridge; when the bridge vibrates, the horizontal displacement of the bridge causes the upper bearing plate 1 and the lower bearing plate 2 to produce relative displacement, the first convex curved surface of the upper bearing plate 1 and the first concave curved surface of the upper spherical crown body 3 come into contact and slide relative to each other, the second convex curved surface of the lower bearing plate 2 and the second concave curved surface of the lower spherical crown body 4 come into contact and slide relative to each other, generating friction to dissipate seismic energy;

[0104] S400, the energy consumption of the horizontal self-resetting unit 7: the spindle-shaped inner core 71 slides along the inside of the center sleeve 72, and the friction between the inner core 71 and the center sleeve 72 dissipates part of the energy; at the same time, the outer sleeve 73 of the outer layer is subjected to radial extrusion and deformation; and the extrusion of the inner core is generated by the super-elastic effect or self-recovery characteristics of the shape memory alloy, generating a self-resetting restoring force to make the inner core 71 return to the initial position, completing the horizontal self-resetting function;

[0105] S500, disc spring group damping and resetting: under the action of vertical load and seismic load, the disc spring group 5 absorbs and dissipates seismic energy through elastic compression deformation, plays a role in seismic reduction and isolation; when the seismic load disappears, the disc spring group 5 automatically recovers to its original state by using the stored elastic energy, realizing the self-resetting in the vertical direction.

[0106] In this embodiment, the elastic resetting and seismic reduction principle: the disc spring group 5 utilizes the linear elastic deformation characteristics of the spring, and under the action of vertical load and seismic load, the disc spring group 5 absorbs and dissipates seismic energy through elastic compression deformation, playing a role in seismic reduction and isolation. When combined in parallel, multiple disc springs are compressed at the same time, which can quickly respond to large load impact; when combined in series, the disc springs deform gradually, extending the energy dissipation path and thus providing a sustained damping effect. The mixed combination can customize the stiffness curve of the disc spring group 5 by adjusting the number of parallel and series disc springs, the thickness and diameter of the spring sheet, etc., to achieve the optimal seismic reduction effect of the seismic load. This combination can effectively control the response of the system under different seismic intensities, both bearing high-strength load and providing sufficient elastic recovery under small load. When the seismic load disappears, the disc spring group 5 automatically recovers to its original state by using the stored elastic energy, realizing the self-resetting in the vertical direction. The design of the disc spring not only considers the elastic restoring force, but also optimizes the nonlinear stiffness characteristics, so that the system maintains high flexibility under light load and has sufficient support force under heavy load. When the seismic load disappears, the disc spring group 5 realizes self-resetting by using the stored elastic potential energy. The disc springs combined in parallel can quickly restore the initial state of the support due to their high stiffness; the disc springs combined in series provide a larger elastic displacement, which is suitable for slow resetting after a large amplitude deformation. The disc springs combined in a mixed manner can balance these two effects and adjust the size of the resetting speed and force according to actual needs.

[0107] The combination form of the disc spring group can achieve high durability and long-term stability through reasonable design. The disc spring has excellent elasticity and fatigue performance, and can withstand dynamic load for a long time without failure. The mixed combination method can avoid the premature failure of single disc springs due to excessive stress, prolonging the service life of the entire support system.

[0108] S600, the synergistic work of shock absorption and self-resetting: the horizontal friction pendulum reduces seismic response through negative stiffness effect, the self-resetting unit provides horizontal self-resetting function, and the vertical disc spring group 5 ensures vertical shock absorption and resetting; the overall system forms comprehensive control over multi-dimensional seismic response through the combined action of various structures.

[0109] Multi-dimensional seismic mitigation effect: the synergistic work of various units of the support enables the system to simultaneously respond to horizontal and vertical seismic motion. The horizontal friction pendulum reduces seismic response through negative stiffness effect, the shape memory alloy unit provides horizontal self-resetting function, and the vertical disc spring group 5 ensures vertical shock absorption and resetting. The overall system forms comprehensive control over multi-dimensional seismic response through the combined action of these units.

[0110] Self-adaptive adjustment of seismic response under different seismic fortification levels: the support system can automatically adjust the response characteristics according to different seismic intensities. Under small earthquake action, the system mainly absorbs seismic energy through the slight deformation of the shape memory alloy and the slight elastic change of the disc spring; under strong earthquake, the negative stiffness effect of the friction pendulum and the large compression of the disc spring work together to ensure the overall stability of the bridge. This self-adaptive adjustment capability enables the support to achieve optimal seismic effect under different seismic fortification targets.

[0111] Through the detailed design and implementation of the above technical principles, the three-dimensional self-resetting seismic mitigation bridge support of the present application can significantly improve the comprehensive seismic capacity of the bridge under seismic action, realize multi-dimensional and all-around seismic mitigation and self-resetting functions, and ensure the safety and service life of the bridge structure after strong earthquakes.

[0112] Through Figure 13 and Figure 14 By comparison, when the lateral displacement of the support of the present application is small, the overall horizontal restoring force of the support is small, and the support as a whole does not exhibit obvious limiting capacity, like ordinary friction pendulum supports. When the lateral displacement of the support of the present application is large, the restoring force of the support increases rapidly compared to ordinary friction pendulum supports, showing good limiting capacity. In line with the design target, the support has small stiffness under small displacement, preventing the bridge substructure from generating large internal force response, and has large stiffness under large displacement, improving the limiting capacity of the support of the present application and preventing the bridge from falling and other destructive disasters.

[0113] The beneficial effects of the present application are: the present application discloses a three-dimensional self-resetting seismic mitigation bridge support, which comprises an upper support plate 1 and a lower support plate 2; a center slider is arranged between the upper support plate 1 and the lower support plate 2, one end of the center slider abuts the bottom end of the upper support plate 1, and the end of the center slider away from the upper support plate 1 abuts the lower support plate 2; the center slider is used to reduce the horizontal and vertical vibration of the bridge structure; a self-resetting unit 7 is arranged between the upper support plate 1 and the lower support plate 2, one end of the self-resetting unit 7 is connected to the bottom end of the upper support plate 1, and the end of the self-resetting unit 7 away from the upper support plate 1 is connected to the top end of the lower support plate 2; the self-resetting unit 7 is used for post-seismic reset of the bridge structure.

[0114] The three-dimensional self-resetting seismic mitigation bridge support provided by the present application provides excellent all-around seismic mitigation effect and self-resetting function through the horizontal friction pendulum energy dissipation and seismic mitigation unit based on the negative stiffness principle, the horizontal energy dissipation self-resetting unit 7 based on the shape memory alloy, and the vertical disc spring self-resetting seismic mitigation unit.

[0115] The present application can provide seismic mitigation function in horizontal and vertical directions at the same time, effectively reduce the impact of earthquake on bridge structure, protect the overall stability of the bridge, solve the problem that the traditional bridge seismic mitigation support can only provide seismic mitigation capacity in a single direction and cannot comprehensively cope with complex earthquake action.

[0116] The present application provides self-resetting force through shape memory alloy and disc spring device, has excellent self-resetting ability after earthquake, can automatically recover to the initial state in horizontal and vertical directions, ensures the continuous use performance and safety of the bridge, solves the defect that the traditional seismic mitigation support is difficult to recover to the original position after earthquake and needs artificial repair.

[0117] The present application has excellent adaptive ability, can respond and adjust according to different levels of earthquake action, and realizes reasonable fortification under multi-level earthquake action. This adaptive characteristic not only can improve the seismic performance of the bridge, but also can make it more cost-effective and structurally safe, solves the problem that the traditional support has insufficient adaptive ability and cannot effectively cope with different intensity earthquakes, significantly improves the safety of the bridge under different seismic fortification targets.

Claims

1. A three-dimensional self-centering seismic mitigation bridge bearing, characterized by, The utility model relates to a bridge support structure, including: Upper support plate and lower support plate; Center slider is arranged between upper support plate and lower support plate, one end of center slider is in abutment with the bottom end of upper support plate, and the end of center slider away from upper support plate is in abututment with lower support plate;Center slider is used to reduce the vibration of bridge structure in horizontal and vertical directions; Self-resetting unit is provided with four groups, is arranged around center slider, the axis of self-resetting unit is perpendicular to the axis of center slider;One end of self-resetting unit is connected with the bottom end of upper support plate, and the end of self-resetting unit away from upper support plate is connected with the top end of lower support plate;Self-resetting unit is used for the post-earthquake reset of bridge structure; Center slider includes center guide cylinder and disc spring group, and disc spring group surrounds the outer wall of center guide cylinder; Self-resetting unit includes: Support hinge seat is multiple; First support hinge seat, second support hinge seat, third support hinge seat and fourth support hinge seat are arranged in the end of upper support plate near center guide cylinder, and are fixedly connected with upper support plate;First support hinge seat, second support hinge seat, third support hinge seat and fourth support hinge seat are arranged in parallelogram shape; The end of first support hinge seat, second support hinge seat, third support hinge seat and fourth support hinge seat away from upper support plate is provided with pin hole; Fifth support hinge seat, sixth support hinge seat, seventh support hinge seat and eighth support hinge seat are arranged in the end of lower support plate near center guide cylinder, and are fixedly connected with lower support plate;Fifth support hinge seat, sixth support hinge seat, seventh support hinge seat and eighth support hinge seat are arranged in parallelogram shape; The end of fifth support hinge seat, sixth support hinge seat, seventh support hinge seat and eighth support hinge seat away from lower support plate is provided with pin hole; In vertical direction, first support hinge seat, second support hinge seat, third support hinge seat and fourth support hinge seat correspond to eighth support hinge seat, fifth support hinge seat, sixth support hinge seat and seventh support hinge seat respectively; Self-resetting unit further includes: Friction assembly is multiple, and is arranged between upper support plate and lower support plate;One end of first friction assembly is connected with first support hinge seat, and the end away from first support hinge seat is connected with fifth support hinge seat; One end of second friction assembly is connected with second support hinge seat, and the end away from second support hinge seat is connected with sixth support hinge seat; One end of third friction assembly is connected with third support hinge seat, and the end away from third support hinge seat is connected with seventh support hinge seat; One end of fourth friction assembly is connected with fourth support hinge seat, and the end away from fourth support hinge seat is connected with eighth support hinge seat; Friction assembly includes: The inner core is in the shape of a spindle, and one end of the inner core is provided with a connecting lug, and the connecting lug is provided with a connecting hole matched with the pin hole; One end of the inner core with the connecting hole is connected with one end of the support hinge seat with the pin hole; A center sleeve is arranged between the first inner core and the second inner core, one end of the center sleeve is sleeved on one end of the first inner core away from the connecting lug, and one end of the center sleeve away from the first inner core is sleeved on one end of the second inner core away from the connecting lug; The center sleeve is provided with a slot on one side close to the inner core, and the shape of the slot corresponds to the shape of the inner core; the axis of the center sleeve is the same as the axis of the inner core; The inner surface of the slot of the center sleeve and the outer surface of the inner core are coated with sliding friction coating; A plurality of end plates are arranged between the connecting lug and the inner core, one end of each end plate is fixedly connected with the connecting lug, and the end of each end plate away from the connecting lug is fixedly connected with the inner core away from the center sleeve; The self-resetting unit further comprises: An outer sleeve is sleeved on the outer side of the center sleeve along the length direction of the center sleeve, and is used to provide pre-pressure for the center sleeve; The outer sleeve is made of shape memory alloy; The sliding friction coating is polytetrafluoroethylene, polyether ketone, polyimide or polycarbonate.

2. The three-dimensional self-resetting seismic mitigation bridge support according to claim 1, wherein, The upper support plate is provided with a first central sliding area at one end close to the central slider, and the lower support plate is provided with a second central sliding area at one end close to the central slider; The first central sliding area is provided with a first convex curved surface; The second central sliding area is provided with a second convex curved surface; The first convex curved surface and the second convex curved surface are coated with sliding friction coating.

3. The three-dimensional self-resetting seismic mitigation bridge support according to claim 2, wherein, The central slider further comprises: An upper spherical crown body, the top end of the upper spherical crown body is provided with a first concave curved surface, and the first concave curved surface abuts against the first convex curved surface; The end of the upper spherical crown body away from the first concave curved surface is provided with a first recess; A lower spherical crown body, the bottom end of the lower spherical crown body is provided with a second concave curved surface, and the second concave curved surface abuts against the second convex curved surface; The end of the lower spherical crown body away from the second concave curved surface is provided with a second recess; The end of the lower spherical crown body away from the second concave curved surface is arranged in the first recess of the upper spherical crown body.

4. The three-dimensional self-resetting seismic mitigation bridge support according to claim 3, wherein, The central guide cylinder is arranged in the first recess of the upper spherical crown body, the top end of the central guide cylinder abuts against the top wall of the first recess, and the end of the central guide cylinder away from the upper spherical crown body extends into the second recess of the lower spherical crown body.

5. The working method of a three-dimensional self-resetting seismic mitigation bridge bearing according to claim 4, characterized in that, The method comprises the following steps: S100, first, accurately install all components of the support in a predetermined order and combination; S200, after the installation of the step S100 is completed, the whole system is checked to ensure that the connection between the parts is tight, the sliding area is not blocked, and the pre-tightening force of the disc spring group and the outer sleeve meets the design requirements; S300, in use, the upper support plate is fixedly connected to the upper structure of the bridge, and the lower support plate is fixedly connected to the foundation at the bottom of the bridge; when the bridge vibrates, the horizontal displacement of the bridge causes the upper support plate and the lower support plate to relatively displace, the first convex curved surface of the upper support plate and the first concave curved surface of the upper spherical crown body relatively slide, the second convex curved surface of the lower support plate and the second concave curved surface of the lower spherical crown body relatively slide, and frictional force is generated to dissipate seismic energy; S400, horizontal energy dissipation self-resetting unit: the spindle-shaped inner core slides along the inside of the center sleeve, and the friction between the inner core and the center sleeve dissipates part of the energy; at the same time, the outer sleeve of the outer layer is radially extruded and deformed; and the extruded inner core is generated by the super-elastic effect or self-recovery characteristics of the shape memory alloy, a self-resetting restoring force is generated to make the inner core return to the initial position, and the horizontal self-resetting function is completed; S500, disc spring group shock absorption and reset: under the action of vertical load and seismic load, the disc spring group absorbs and dissipates seismic energy through elastic compression deformation, plays a role of shock absorption and seismic isolation, and when the seismic load disappears, the disc spring group automatically restores to the original state by using the stored elastic energy, and realizes the self-resetting in the vertical direction; S600, cooperative work of shock absorption and self-resetting: the horizontal friction pendulum reduces the seismic response through the negative stiffness effect, the self-resetting unit provides the horizontal self-resetting function, and the vertical disc spring group ensures the vertical shock absorption and reset; the system as a whole forms a comprehensive control of multi-dimensional response to earthquakes through the combined action of various structures.

Images