A self-resetting support

Abstract

The present invention relates to the field of seismic isolation and shock absorption of engineering structures, and discloses a self-resetting bearing, wherein the bearing includes an upper bearing plate and a lower bearing plate, and also includes a support member and an energy absorber, wherein the support member is placed on the lower bearing plate, and the upper bearing plate is placed on the support member, and a plurality of energy absorbers are arranged on the periphery of the support member, and the two ends of the energy absorbers are detachably connected to the upper bearing plate and the lower bearing plate respectively. A self-resetting bearing provided by the present invention will swing and deform under the action of an earthquake, and can dissipate the seismic energy through the energy absorber in the bearing, and the vibration frequency of the structure can be changed through the swing of the support member in the bearing, and at the same time, the bearing has a good self-resetting ability under the deadweight of the upper structure, thereby overcoming the shear failure problem of the bearing in the existing engineering structure in a strong earthquake, and at the same time enhancing the energy dissipation capacity and self-resetting ability of the bearing, and improving the post-earthquake functional recoverability of the overall engineering structure.

Description

Technical Field

[0001] The invention relates to the field of seismic isolation and shock absorption of engineering structures, and in particular to a self-resetting support. Background Art

[0002] Earthquakes are a common natural disaster. Once an engineering structure is damaged by an earthquake, it will cause huge casualties and economic losses, and it is extremely difficult to repair it after the earthquake. Therefore, it is of great significance to improve the seismic performance of engineering structures, especially the recoverability after an earthquake.

[0003] In engineering structures, especially bridge structures, it is usually necessary to install bearings between the upper structure and the lower structure to resist external loads, temperature changes, earthquakes, etc. Traditional bearings such as plate rubber bearings adapt to structural deformation under earthquakes through shear deformation between rubber steel plate laminates, but due to the limited shear deformation capacity that the bearing can provide, it is difficult to provide effective energy dissipation; and this shear deformation is uncontrollable, especially under large horizontal earthquakes, the shear deformation is likely to be too large to cause shear failure of the bearing, resulting in serious consequences.

[0004] At present, commonly used seismic isolation bearings will experience excessive horizontal shear deformation during strong earthquakes, which may cause serious collisions between superstructures or between bridge superstructures and blocks. At the same time, large residual displacements may occur after the earthquake, which is not conducive to the rapid recovery of engineering structures. Taking bridges as an example, the existing fixed bearings of bridges cause the substructure of the bridge to be subjected to large forces during earthquakes. The substructure of the bridge is seriously damaged during earthquakes, and large plastic deformation may occur after the earthquake. It is difficult to achieve self-reset or functional recovery of the bridge structure after the earthquake, and the entire bridge structure is also difficult to repair quickly. Summary of the invention

[0005] The embodiment of the present invention provides a self-resetting bearing, which is used to solve or partially solve the problems of low energy dissipation capacity of existing bearings, easy failure due to excessive shear deformation or large residual displacement, and realize the post-earthquake rapid recovery function of the engineering structure.

[0006] An embodiment of the present invention provides a self-resetting support, including an upper support plate and a lower support plate, and also including a support member and an energy absorber. The support member is placed on the lower support plate, and the upper support plate is placed on the support member. A plurality of energy absorbers are arranged on the periphery of the support member, and two ends of the energy absorber are detachably connected to the upper support plate and the lower support plate respectively.

[0007] Based on the above solution, the plurality of energy absorbers are symmetrically distributed about the support member.

[0008] Based on the above solution, the cross-sectional dimensions at both ends of the energy absorber are greater than the cross-sectional dimensions in the middle portion.

[0009] On the basis of the above scheme, thread structures are respectively provided on the outer walls at both ends of the energy absorber, and internal thread holes matching the thread structures are respectively provided on the upper support plate and the lower support plate at positions corresponding to the energy absorber.

[0010] On the basis of the above solution, the length of the internal threaded hole on the upper support plate and / or the lower support plate is greater than the insertion length of the energy absorber when the installation is completed.

[0011] On the basis of the above scheme, a plurality of shear keys are fixedly connected on the bottom surface of the upper support plate and on the top surface of the lower support plate on the periphery of the support member; the distance between the lower end of the shear key connected to the upper support plate and the side wall of the support member is greater than the distance between the upper end and the side wall of the support member, and the distance between the upper end of the shear key connected to the lower support plate and the side wall of the support member is greater than the distance between the lower end and the side wall of the support member.

[0012] Based on the above scheme, the side of the shear key facing the support member is set as an inclined surface; the top end of the shear key connected to the upper support plate is connected to the support member, and the bottom end of the shear key connected to the lower support plate is connected to the support member.

[0013] Based on the above solution, the shear key is provided on each side of the support member.

[0014] Based on the above solution, the support members are respectively located at the center of the upper support plate and the lower support plate.

[0015] A self-resetting bearing provided in an embodiment of the present invention will undergo swing deformation rather than shear deformation under the action of an earthquake, and can dissipate seismic energy through an energy absorber in the bearing. The swinging of the support member in the bearing can reduce bearing damage, and at the same time, the bearing has a certain self-resetting ability under the deadweight of the superstructure, thereby solving the problems of low energy dissipation capacity, excessive shear deformation or large residual displacement of existing bearings, and improving the seismic performance of the overall engineering structure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 It is a structural schematic diagram of a self-resetting support according to an embodiment of the present invention;

[0018] Figure 2It is a schematic diagram of the swing state of the self-resetting support according to an embodiment of the present invention;

[0019] Figure 3 is an overall schematic diagram of an energy consumer in an embodiment of the present invention;

[0020] Figure 4 is a schematic top view of an energy dissipator in an embodiment of the present invention;

[0021] Figure 5 For the embodiments of the present invention Figure 1 Schematic diagram of the cross section of the AA surface;

[0022] Figure 6 This is a schematic diagram of the application of the self-resetting bearing on a bridge in an embodiment of the present invention;

[0023] Figure 7 It is a schematic diagram of the partial connection of the self-resetting bearing on the bridge in an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] Among them, 1. upper bearing plate; 2. support; 3. energy absorber; 3-1. energy absorption section; 3-2. external threaded end; 4. lower bearing plate; 5. shear key; 6. reserved bolt hole; 7. internal threaded hole; 8. bearing anchor bolt; 9. pier; 10. cap beam; 11. self-resetting bearing; 12. prefabricated T beam; 13. embedded threaded pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments 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.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] refer to Figure 1The embodiment of the present invention provides a self-resetting support, which includes an upper support plate 1 and a lower support plate 4. The self-resetting support also includes a support member 2 and an energy dissipator 3. The support member 2 is placed on the lower support plate 4, and the upper support plate 1 is placed on the support member 2. A plurality of energy dissipators 3 are arranged on the periphery of the support member 2. One end of the energy dissipator 3 is detachably connected to the upper support plate 1, and the other end of the energy dissipator 3 is detachably connected to the lower support plate 4, so as to facilitate the disassembly and replacement of the energy dissipator 3.

[0029] The support member 2 is placed between the lower support plate 4 and the upper support plate 1, and is disconnected from the upper support plate 1 and the lower support plate 4, that is, there is no connection between the support member 2 and the upper support plate 1 and the lower support plate 4. This allows the support member 2 to swing relative to the support plate. The energy absorber 3 on the periphery of the support member 2 is arranged between the upper support plate 1 and the lower support plate 4; and the two ends of the energy absorber 3 are correspondingly connected to the upper support plate 1 and the lower support plate 4. The energy absorber 3 has a certain deformation capacity.

[0030] The self-resetting bearing provided in this embodiment will undergo swing deformation rather than shear deformation under the action of an earthquake, that is, the support member 2 will swing relative to the bearing plate, such as Figure 2 As shown. When the support 2 swings, the energy absorber 3 will deform accordingly between the upper and lower bearing plates. The seismic energy can be dissipated by the energy absorber 3 in the support. The swing of the support 2 in the support can reduce the damage to the support. At the same time, the support has a certain self-reset ability under the deadweight of the upper structure of the upper support plate 1, thereby overcoming the problem of excessive shear deformation of the existing support under the action of earthquakes, and at the same time enhancing the energy dissipation capacity and self-reset ability of the support, and improving the seismic performance of the overall engineering structure.

[0031] The self-resetting bearing 11 provided in this embodiment can be used as a bridge bearing or in a building structure. Under the action of an earthquake, the support member 2 can swing, and the energy absorber 3 undergoes elastic-plastic deformation to dissipate the seismic energy. Compared with existing bearings, the self-resetting bearing 11 can transform the original shear deformation into the swing deformation of the rigid body (i.e., the support member 2) and the bending energy dissipation of the energy absorber 3. Through reasonable design, the self-resetting bearing 11 can be self-reset after an earthquake, and the bearing damage is concentrated on the energy absorber 3. The energy absorber 3 damaged after an earthquake is easy to replace. This embodiment adopts the principle of bearing swing deformation, and the bearing simultaneously realizes the separation of bearing and energy dissipation functions. The self-resetting swing deformation and energy dissipation of the bearing reduce the damage to the main structure, thereby improving the seismic toughness and recoverability of the engineering structure.

[0032] On the basis of the above embodiment, further, the energy absorber 3 includes an energy absorbing steel rod. The material of the energy absorber 3 is steel, which has a certain deformability and a strength that can meet certain support requirements. The energy absorber 3 can be in a rod shape, which is convenient for generating elastic-plastic deformation to achieve energy absorbing effect. Furthermore, the energy absorber 3 can also be made of other materials or shapes, so as to better achieve the purpose of consuming earthquake energy, and there is no specific limitation.

[0033] Furthermore, the cross section of the support member 2 may be a circular or rectangular cross section; the support member 2 includes a steel block, a steel tube concrete block or other rigid materials. The support member 2 should meet the support stiffness requirements.

[0034] On the basis of the above embodiment, further, a plurality of energy absorbers 3 are symmetrically distributed about the support member 2. Figure 5 , multiple energy absorbers 3 can be arranged on each side of the support 2. The energy absorbers 3 are symmetrically distributed about the support 2, and multiple energy absorbers 3 are evenly distributed along the circumferential direction on the periphery of the support 2. When the support 2 swings, the energy absorbers 3 move with the upper and lower support plates to generate bending and tensile and compressive deformation, which plays an energy dissipation role. The symmetrical arrangement of energy absorbers 3 on the periphery of the support 2 is conducive to the stable force of the support 2, and improves the energy dissipation capacity, self-reset ability and stability of the support.

[0035] On the basis of the above embodiments, further, referring to Figure 3 The cross-sectional dimensions at both ends of the energy absorber 3 are larger than the cross-sectional dimensions in the middle. The ends of the energy absorber 3 are mainly used to connect with the upper and lower support plates. The middle part of the energy absorber 3 is the main energy absorbing section 3-1. Setting the cross-sectional dimensions at both ends of the energy absorber 3 larger can facilitate connection with the upper and lower support plates and avoid failure of the energy absorber at the connection part.

[0036] On the basis of the above embodiments, further, referring to Figure 1 , the outer walls of both ends of the energy absorber 3 are provided with thread structures, and the upper support plate 1 and the lower support plate 4 are provided with internal thread holes 7 matching the thread structures at the corresponding positions of the energy absorber 3. The two ends of the energy absorber 3 are screwed into the reserved internal thread holes 7 of the upper and lower support plates. When the support member 2 swings, the energy absorber 3 bends and deforms in tension and compression to dissipate the seismic energy.

[0037] Specifically, refer to Figure 3, the energy absorber 3 is dog-bone shaped, with the middle part being the energy absorption section 3-1, and the energy absorption section 3-1 being a columnar structure with the same cross section. The upper and lower ends of the energy absorber 3 are provided with external threaded ends 3-2, and the external threaded ends 3-2 are provided with external threaded structures, and the cross-sectional dimensions of the external threaded ends 3-2 are larger than the cross-sectional dimensions of the energy absorption section 3-1. The external threaded ends 3-2 of the energy absorber 3 are used to be connected and fixed to the upper support plate 1 and the lower support plate 4 through the internal threaded holes 7. A gradient section can be connected between the middle energy absorption section 3-1 of the energy absorber 3 and the external threaded ends 3-2. The cross-sectional dimensions of the gradient section gradually increase from the energy absorption section 3-1 to the external threaded ends 3-2. Reference Figure 4 The cross section of the energy dissipator 3 may be circular. The cross section of the energy dissipator 3 may also be other shapes or a combination of other shapes. For example, the cross sections of the energy dissipation section 3-1 and the gradient section may be non-circular, and the cross section of the external threaded end 3-2 may be circular. The specific shape is not limited.

[0038] On the basis of the above embodiments, further, referring to Figure 1 , the length of the internal threaded hole 7 on the upper support plate 1 and / or the lower support plate 4 is greater than the length of the energy absorber 3 inserted when the installation is completed. The energy absorber 3 is installed when both ends of the energy absorber 3 are connected to the upper and lower support plates respectively. The length of the energy absorber 3 inserted when the installation is completed is the length of the energy absorber 3 inserted into the internal threaded hole 7, which is Figure 1 L1 in Figure 1 The middle internal threaded hole 7 passes through the upper and lower support plates. At this time, the length of the internal threaded hole 7 is L2.

[0039] Setting L2 greater than L1 is to facilitate the replacement and installation of the energy absorber 3. Specifically, take the case where the length of the internal threaded hole 7 on the upper support plate 1 is greater than the length of the energy absorber 3 inserted when it is installed as an example: when replacing a new energy absorber, the upper structure and the upper support plate can be lifted up with a jack, and the upper end of the energy absorber 3 is first screwed into the internal threaded hole 7 of the upper support plate 1, and the screwing depth can be greater than the final required depth, so that after the jack is lowered, the lower end of the energy absorber 3 does not reach the lower support plate or just touches the lower support plate, and the lower end of the energy absorber 3 can be aligned with the internal threaded hole 7 on the lower support plate 4. Then the energy absorber 3 is screwed out of the internal threaded hole 7 on the upper support plate 1, and the lower end of the energy absorber 3 is screwed into the lower support plate 4 until the energy absorber 3 reaches the final required position, which can be the position where the two ends of the energy absorber 3 are inserted into the upper and lower support plates to the same depth.

[0040] Therefore, when the energy dissipator 3 is twisted, the installation of the energy dissipator 3 can be realized without moving the upper and lower support plates at the same time. This design is ingenious, simple to operate and easy to realize. The disassembly of the energy dissipator 3 can be carried out in reverse according to the above steps.

[0041] Furthermore, the internal threaded hole 7 on the upper support plate 1 and / or the lower support plate 4 may be provided through the upper support plate 1 and / or the lower support plate 4. The specific details are not limited, and the purpose is to facilitate the installation and removal of the energy absorber 3.

[0042] On the basis of the above embodiments, further, referring to Figure 1 , a plurality of shear keys 5 are respectively connected to the bottom surface of the upper support plate 1 and the top surface of the lower support plate 4 on the periphery of the support member 2. The distance between the lower end of the shear key 5 connected to the upper support plate 1 and the side wall of the support member 2 is greater than the distance between the upper end and the side wall of the support member 2; the distance between the upper end of the shear key 5 connected to the lower support plate 4 and the side wall of the support member 2 is greater than the distance between the lower end and the side wall of the support member 2. The shear keys 5 limit the support member 2 around the top and bottom of the support member 2, and can prevent the support member 2 from sliding relative to the lower support plate 4 and the upper support plate 1. The shear keys 5 can be welded to the upper support plate 1 and the lower support plate 4.

[0043] The distance between the end of the shear key 5 away from the support plate and the support member 2 is relatively large. Figure 2 , so that the shear key 5 plays a limiting role on the support member 2 to prevent the support member 2 from sliding and twisting horizontally, and the support member 2 can swing between the shear keys 5. This setting can prevent the shear key 5 from colliding with the support member 2 during the swinging process. The arranged shear keys 5 limit the horizontal displacement of the upper and lower surfaces of the support member 2 to prevent the support member 2 from sliding and twisting, and at the same time ensure that the normal swing of the support member 2 is not restricted.

[0044] Furthermore, the side of the shear key 5 facing the support member 2 is set as an inclined surface. The top end of the shear key 5 connected to the upper support plate 1 is connected to the support member 2, and the bottom end of the shear key 5 connected to the lower support plate 4 is connected to the support member 2. That is, the side of the shear key 5 facing the support member 2 is inclined relative to the surface of the support member 2. And the shear key 5 contacts the support member 2 at the periphery of the support member 2, which can more effectively prevent the support member 2 from sliding horizontally.

[0045] Furthermore, the side of the shear key 5 facing the support member 2 may also be a curved surface, such as a convex surface or a concave surface, so as to achieve horizontal positioning of the support member 2 without affecting the swinging movement of the support member 2, and no specific limitation is made.

[0046] Furthermore, the shear key 5 is fixedly arranged at the upper and lower corners or around the support member 2. Figure 5 A shear key 5 is provided at the corner of each side of the support member 2, thereby limiting the support member 2 on each side, so that the support member 2 cannot slip in any direction.

[0047] Shear keys 5 may also be arranged at the non-corner parts, i.e., the sides, of the support member 2 to achieve a better limiting effect on the support member 2. The specific arrangement positions and quantities of the shear keys 5 around the support member 2 may be flexibly arranged according to actual needs, and are not specifically limited.

[0048] On the basis of the above embodiments, further, referring to Figure 1 The cross section of the shear key 5 is triangular, and one of the acute angles is against the end of the support member 2. The shear key 5 is a columnar structure with a triangular cross section. It is fixedly arranged at the upper and lower corners or around the support member 2 to prevent the support member 2 from sliding relative to the lower support plate 4 and the upper support plate 1, while ensuring that the normal swing of the support member 2 is not restricted. The arranged shear key 5 can also limit the torsion of the support member 2.

[0049] Specifically, the cross-sectional shape of the shear key 5 can be a right triangle, one of the right-angled sides is used to connect to the upper support plate 1 or the lower support plate 4, and the hypotenuse faces the support member 2. The cross-sectional shape of the shear key 5 can also be an obtuse triangle or an acute triangle, so that the side facing the support member 2 is an inclined surface, and the angle between the inclined surface and the side of the support member 2 is determined according to the swing angle of the support member 2 required by the design, and is not specifically limited. Furthermore, the cross-sectional shape of the shear key 5 can also be a parallelogram, a trapezoid or any other shape, so as to achieve the horizontal limit of the support member 2 without affecting the swing of the support member 2, and is not specifically limited.

[0050] On the basis of the above embodiment, further, the support member 2 is respectively located at the center of the upper support plate 1 and the lower support plate 4. The support member 2 is placed at the center of the upper support plate 1 and the lower support plate 4, and is in hard contact with the upper support plate 1 and the lower support plate 4 without any connection measures.

[0051] Furthermore, this embodiment also provides an engineering structure, taking a bridge structure as an example, including the above-mentioned self-resetting support, and also including an upper beam body and a lower beam body, the upper support plate is connected to the upper beam body, and the lower support plate is connected to the lower beam body. Figure 6 The self-resetting support 11 is arranged between the upper beam and the lower beam or the pier 9. Figure 1 , the upper support plate 1 and the lower support plate 4 are respectively provided with reserved bolt holes 6; Figure 7 The upper support plate 1 is connected to the upper beam body through the support anchor bolt 8 at the reserved bolt hole 6, and the lower support plate 4 is connected to the lower beam body or pier column 9 through the support anchor bolt 8 at the reserved bolt hole 6. Ensure that the support anchor bolt 8 can pass through the reserved bolt hole 6 and be effectively anchored and connected with the upper beam body and the lower cap beam 10 or pier column 9.

[0052] Specifically, refer to Figure 7The upper beam above the support can be a prefabricated T beam 12; the lower beam below the support can be a cap beam 10. The support anchor bolt 8 passes through the upper support plate 1 and extends into the embedded threaded tube 13 in the upper prefabricated T beam 12 to achieve the connection and fixation between the upper support plate 1 and the upper beam. The support anchor bolt 8 passes through the embedded threaded tube 13 in the lower support plate 4 and the lower cap beam 10 to anchor. The schematic diagram of the application of the self-resetting support 11 on the bridge is shown in Figure 6 and Figure 7 shown.

[0053] On the basis of the above embodiment, in order to solve the problems existing in the existing engineering structure support, this embodiment proposes to convert the shear deformation mode of the existing support into a swing energy dissipation mode. The swing of the support member 2 in the support and the bending of the energy dissipator 3 provide the support with self-resetting ability and energy dissipation ability. This embodiment has a simple structure, is easy to implement, and can be widely used in engineering structures.

[0054] Furthermore, the self-resetting bearings provided in the above-mentioned embodiments can not only be used in bridges, but also can be applied to the fields of vibration reduction and seismic isolation of building structures and spatial structures.

[0055] To achieve the above purpose, the present embodiment provides a swing self-resetting bearing 11, which specifically relates to the field of seismic isolation and shock absorption of engineering structures. The self-resetting bearing 11 mainly includes an upper bearing plate 1, a rigid support and swing component, i.e., a support member 2, a lower bearing plate 4, an energy-absorbing steel rod connected between the upper and lower bearing plates 4, and a shear key 5 arranged at the corner or side of the rigid support and swing component. From bottom to top, they are the lower bearing plate 4, the rigid support and swing component, and the upper bearing plate 1.

[0056] Under the action of earthquake, the rigid support and the swing component swing, and the shear key 5 is set to prevent the rigid support and the swing component from sliding, thereby avoiding the problem of excessive shear slip and uncontrollable shear failure of traditional rubber bearings in strong earthquakes. At the same time, the rigid support and the swing component swing, reducing the damage to the main body of the support, and concentrating the damage on the energy-absorbing steel rod.

[0057] The beneficial effects of this embodiment are as follows: the rigid support and rocking components in the support are placed in the middle of the upper and lower support plates, and are in hard contact with the upper support plate 1 and the lower support plate 4 without any connection measures; the rigid support and rocking components are provided with shear keys 5 at the corners or around them, thereby ensuring that the rigid support and rocking components can prevent sliding while being able to rock freely, avoiding the excessive shear resistance and uncontrollable shear damage of traditional rubber bearings.

[0058] The upper and lower ends of the energy-absorbing steel rod in this embodiment are anchored to the upper and lower support plates. When the support sways, the seismic energy can be dissipated through the bending and tensile and compressive deformation of the energy-absorbing steel rod. After earthquake damage, the damaged energy-absorbing steel rod can be removed and quickly replaced with a new one.

[0059] The rigid support and the swinging components of this embodiment swing, which can reduce their own damage. At the same time, the support has good self-reset ability under the deadweight of the upper structure of the upper support plate 1. The swing energy dissipation capacity of the support can be enhanced by adding energy-absorbing steel bars, and finally the support can be quickly restored after the earthquake. The support adopts the swing deformation principle, and the support realizes the separation of bearing and energy dissipation functions at the same time. The self-reset swing deformation and energy dissipation of the support reduce the damage of the main structure, and improve the seismic toughness and recoverability of the engineering structure.

[0060] This embodiment breaks through the traditional bearing design concept, has a flexible design, and a clear force mechanism. It reduces the damage of the bearing through rigid support and swinging of the swinging parts, and concentrates the damage on the energy-absorbing steel rod. It can be used after a little repair, which is conducive to the rapid recovery of the engineering structure to ensure that the traffic lifeline is not interrupted and speed up the rescue time in the disaster area; at the same time, it enables the bearing to avoid uncontrollable shear deformation and shear damage, and has good energy dissipation capacity and self-reset ability. The energy-absorbing steel rod can be quickly replaced after damage, and has the characteristics of rapid repair. It can solve the problems of low energy dissipation capacity, easy failure due to excessive shear deformation, or large residual displacement of traditional bearings under earthquakes, and realize the rapid recovery function of engineering structures after earthquakes. The swinging self-reset bearing 11 is simple in structure, easy to implement, and can be widely used in engineering structures. It is worthy of promotion and application in actual engineering.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-resetting support, comprising an upper support plate and a lower support plate, characterized in that: It also includes a support member and an energy dissipator, wherein the support member is placed on the lower support plate, the upper support plate is placed on the support member, a plurality of energy dissipators are arranged on the periphery of the support member, and two ends of the energy dissipators are detachably connected to the upper support plate and the lower support plate respectively; The energy absorber is dog-bone shaped, with the middle portion being an energy absorbing section, and the energy absorbing section being a columnar structure with the same cross section; the upper and lower ends of the energy absorber are provided with external threaded ends; A gradient section is connected between the energy dissipation section and the external thread end, and the cross-sectional size of the gradient section gradually increases from the energy dissipation section to the external thread end; A plurality of shear keys are fixedly connected to the periphery of the support member on the bottom surface of the upper support plate and the top surface of the lower support plate; the distance between the lower end of the shear key connected to the upper support plate and the side wall of the support member is greater than the distance between the upper end and the side wall of the support member, and the distance between the upper end of the shear key connected to the lower support plate and the side wall of the support member is greater than the distance between the lower end and the side wall of the support member; The side surface of the shear key facing the support member is set as an inclined surface; the top end of the shear key connected to the upper support plate is connected to the support member, and the bottom end of the shear key connected to the lower support plate is connected to the support member.

2. The self-resetting support according to claim 1, characterized in that: The plurality of energy absorbers are symmetrically distributed about the support member.

3. The self-resetting support according to claim 1 or 2, characterized in that: The outer walls at both ends of the energy absorber are respectively provided with thread structures, and the upper support plate and the lower support plate are respectively provided with internal thread holes matching the thread structures at positions corresponding to the energy absorber.

4. The self-resetting support according to claim 3, characterized in that: The length of the internal threaded hole on the upper support plate and / or the lower support plate is greater than the insertion length of the energy absorber when the installation is completed.

5. The self-resetting support according to claim 1, characterized in that: The shear key is provided on each side of the support member.

6. The self-resetting support according to claim 1 or 2, characterized in that: The support members are respectively located at the center of the upper support plate and the lower support plate.

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