A swing type self-resetting support

Abstract

The present invention relates to the field of seismic isolation and shock absorption of engineering structures, and discloses a swing-type self-resetting bearing, including an upper bearing plate and a lower bearing plate, and also including a support member and a damper. The support member is placed on the lower bearing plate, and the upper bearing plate is placed on the support member. A plurality of dampers are arranged on the periphery of the support member, and the bottom of the damper is detachably fixedly connected to the lower bearing plate, and the top of the damper is detachably connected to the upper bearing plate in an upward and downward movable manner. The swing-type self-resetting bearing provided by the present invention can change the vibration frequency of the structure through the swinging of the support member in the bearing under the action of an earthquake, and at the same time, the bearing has a good self-resetting ability under the deadweight of the upper structure; when the support member swings, the damper will bend and deform accordingly between the upper and lower bearing plates to dissipate the seismic energy, 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.

Description

Technical Field

[0001] The invention relates to the field of shock isolation and damping of engineering structures, and in particular to a swing type 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 functional recovery of engineering structures. Taking bridges as an example, the existing fixed bearings of bridges cause the substructure of bridges to be subjected to large forces during earthquakes. The substructure of bridges is seriously damaged during earthquakes, and large plastic deformations may occur after the earthquake. It is difficult to achieve self-reset or functional recovery of bridge structures after earthquakes, and the entire bridge structure is also difficult to repair quickly. Summary of the invention

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

[0006] An embodiment of the present invention provides a rocking self-resetting support, including an upper support plate and a lower support plate, and also including a support member and a damper. The support member is placed on the lower support plate, and the upper support plate is placed on the support member. A plurality of dampers are provided on the periphery of the support member, and the bottom of the damper is detachably fixedly connected to the lower support plate, and the top of the damper is detachably and movably connected to the upper support plate.

[0007] On the basis of the above scheme, a plurality of shear keys are respectively connected on the bottom surface of the upper support plate and the top surface of the lower support plate on the periphery of the support member; the side of the shear key close to the support member is an inclined surface to adapt to the swing deformation 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.

[0008] 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.

[0009] Based on the above solution, the plurality of dampers are symmetrically distributed about the support member.

[0010] Based on the above scheme, the bottom surface of the upper support plate is connected to a limiting block at a position corresponding to the damper, and the limiting block is provided with a groove matching the top of the damper, the top of the damper is inserted into the groove, and there is a gap between the top of the damper and the bottom of the groove.

[0011] Based on the above solution, the width of the groove is greater than the width of the top of the damper.

[0012] On the basis of the above solution, the damper comprises an energy absorbing section, the top of the energy absorbing section is connected with an enlarged head, and the enlarged head is inserted into the groove.

[0013] Based on the above solution, the cross-sectional size of the bottom of the energy dissipation section is larger than the cross-sectional size of the top.

[0014] On the basis of the above solution, an anchoring connection plate is connected to the bottom of the damper, and the anchoring connection plate is connected to the lower support plate.

[0015] A rocking self-resetting bearing provided in an embodiment of the present invention will rock and deform under the action of an earthquake, that is, the support member will rock relative to the support plate. When the support member rocks, the damper will correspondingly bend and deform between the upper and lower support plates, thereby dissipating the earthquake energy through the damper in the bearing. The rocking of the support member in the bearing can reduce the damage to the bearing. At the same time, the bearing has a certain self-resetting ability under the deadweight of the upper structure, thereby solving the problems of low energy dissipation capacity, excessive shear deformation or large residual displacement of existing engineering structure 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 swing type self-resetting support according to an embodiment of the present invention;

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

[0019] Figure 3 For the embodiment of the present invention Figure 1 Schematic diagram of the cross section of the AA surface;

[0020] Figure 4 is a schematic structural diagram of a damper in an embodiment of the present invention;

[0021] Figure 5 is a schematic top view of a damper in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of a limit block in an embodiment of the present invention;

[0023] Figure 7 is a schematic top view of a limit block in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the application of a swing type self-resetting bearing on a bridge in an embodiment of the present invention;

[0025] Fig. 9 It is a schematic diagram of the partial connection of the rocking self-resetting bearing on the bridge in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] Among them, 1. Upper bearing plate; 2. Support; 3. Damper; 3-1. Enlarged head; 3-2. Energy absorption section; 3-3. Anchor connecting plate; 4. Lower bearing plate; 5. Shear key; 6. Reserved holes; 7. Damper anchor bolts; 8. Limit block; 9. Reserved internal threaded hole; 10. Reserved screw hole; 11. Support anchor bolt; 12. Prefabricated T-beam; 13. Embedded threaded pipe; 14. Cap beam; 15. Pier; 16. Swinging self-resetting bearing. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] refer to Figure 1 The embodiment of the present invention provides a swing type self-resetting support, which includes an upper support plate 1 and a lower support plate 4; and also includes a support member 2 and a damper 3, wherein 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 dampers 3 are arranged on the periphery of the support member 2. The bottom of the damper 3 is detachably fixedly connected to the lower support plate 4, and the top of the damper 3 is detachably connected to the upper support plate 1.

[0031] The support member 2 is placed on the lower bearing plate 4, and there is no connection measure between the support member 2 and the lower bearing plate 4; the upper bearing plate 1 is placed on the support member 2, and there is no connection measure between the upper bearing plate 1 and the support member 2; the support member 2 is disconnected from the upper bearing plate 1 and the lower bearing plate 4. The cross section of the support member 2 can be circular or rectangular; it can be a steel block, a steel tube concrete block or other rigid materials. The damper 3 has a certain deformation capacity to facilitate its dissipation of seismic energy. The damper 3 is detachably connected between the upper bearing plate 1 and the lower bearing plate 4, which is convenient for the disassembly and replacement of the damper 3 and improves the recoverability of the bearing.

[0032] The present embodiment provides a swing type self-resetting support, which will swing and deform under the action of an earthquake, that is, the support member 2 will swing relative to the support plate, such as Figure 2As shown. When the support member 2 swings, the damper 3 will be deformed accordingly between the upper support plate 1 and the lower support plate 4. Then, the earthquake energy can be dissipated by the damper 3 in the support. The swing of the support member 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 problems of low energy dissipation capacity, excessive shear deformation or excessive residual displacement of the existing support under the action of earthquake, and improving the seismic performance of the overall engineering structure.

[0033] The bottom of the damper 3 is fixedly connected to the lower support plate 4 and is detachable from the lower support plate 4. The top of the damper 3 is detachably connected to the upper support plate 1, and the top of the damper 3 and the upper support plate 1 can undergo relative up-and-down displacement. Because the bottom of the damper 3 is fixed to the lower support plate 4, the damper 3 is in a fixed state; when the support member 2 swings, the upper support plate 1 changes its up-and-down position. An up-and-down movable connection is provided between the damper 3 and the upper support plate 1, so that when the up-and-down position of the upper support plate 1 changes to a certain extent, the damper 3 is not subject to vertical constraints, that is, the damper 3 is prevented from being subjected to tensile and compressive forces when the up-and-down position of the upper support plate 1 changes, and the damper 3 is only subjected to lateral force and bending deformation, and the force mechanism is simpler and clearer, and the energy consumption effect is better achieved.

[0034] The rocking self-resetting bearing of this embodiment can self-reset after an earthquake through reasonable design of the bearing. The post-earthquake damage of the bearing is concentrated on the replaceable damper 3, and the damaged damper 3 is easy to replace. This embodiment adopts the principle of rocking deformation of the bearing, and the bearing realizes the separation of the bearing and energy dissipation functions at the same time. The self-resetting rocking deformation and energy dissipation of the bearing reduce the damage to the main body of the engineering structure, thereby improving the seismic toughness and recoverability of the engineering structure.

[0035] On the basis of the above embodiment, further, a plurality of shear keys 5 are respectively connected on 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.

[0036] The shear key 5 on the upper support plate 1 can be welded to the upper support plate 1; the shear key 5 on the lower support plate 4 can be welded to the lower support plate 4. The shear key 5 limits the support member 2 at the top and bottom peripheries of the support member 2, and can prevent the support member 2 from relative sliding and twisting with the lower support plate 4 and the upper support plate 1.

[0037] 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.

[0038] Further, the shear keys 5 are fixedly arranged at the upper and lower corners and / or the periphery of the support member 2. Specifically, the shear keys 5 on the upper support plate 1 and the lower support plate 4 can be arranged in the same manner. Figure 3 , the arrangement of the shear key 5 on the lower support plate 4 is taken as an example: the shear key 5 connected to the lower support plate 4 can be arranged at the corner of the support member 2. The shear key 5 at the corner of the support member 2 can play a good limiting role on the support member 2. The shear key 5 can be arranged at the corner of each side of the lower end of the support member 2, so as to play a limiting role on each side of the support member 2, so that the support member 2 cannot slip in any direction.

[0039] Shear keys 5 may also be arranged at the non-corner parts, i.e., the side parts, around the lower end of the support member 2, which may also achieve a better limiting effect on the support member 2. The specific arrangement positions and quantities of the shear keys 5 around the upper and lower ends of the support member 2, i.e., the shear keys 5 connected to the support plate, may be flexibly arranged according to actual needs, and are not specifically limited.

[0040] On the basis of the above embodiment, further, 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.

[0041] 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 limitation of the support member 2 without affecting the swing of the support member 2, and no specific limitation is made.

[0042] On the basis of the above embodiments, further, referring to Figure 1 and Figure 2 The shear key 5 is a columnar structure with a triangular cross section. The cross section of the shear key 5 is triangular to avoid collision with the support 2. One of the acute angles supports the end of the support 2; the arranged shear key 5 fixes the horizontal position of the upper and lower surfaces of the support 2 to prevent the support 2 from slipping, and at the same time can ensure that the normal swing of the support 2 is not restricted. The arranged shear key 5 can also limit the torsion of the support 2.

[0043] 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.

[0044] On the basis of the above embodiments, further, referring to Figure 3 , multiple dampers 3 can be arranged on each side of the support member 2; the multiple dampers 3 are symmetrically distributed about the support member 2. When the support member 2 sways, the dampers 3 move together with the upper and lower bearing plates to generate bending deformation and dissipate earthquake energy.

[0045] On the basis of the above embodiments, further, referring to Figure 1 and Figure 2 , the bottom surface of the upper support plate 1 is connected to a limiting block 8 at a position corresponding to the damper 3, and a groove matching the top of the damper 3 is provided on the limiting block 8, and the top of the damper 3 is inserted into the groove. The notch of the groove faces the damper 3. The top of the damper 3 is inserted into the groove on the limiting block 8 connected to the upper support plate 1 to achieve a detachable connection with the upper support plate 1. The groove is used to limit and fix the top of the damper 3 to achieve relative fixation of the position between the damper 3 and the upper support plate 1. And there is a gap between the top of the damper 3 and the bottom of the groove. The upper support plate 1 has space to move up and down relative to the top of the damper 3. An up and down movable connection between the damper 3 and the upper support plate 1 is achieved.

[0046] Specifically, there is a gap between the inserted part of the damper 3 and the bottom of the groove, so that when the upper support plate 1 undergoes a certain degree of up and down displacement, the damper 3 is not subjected to tensile pressure; there may also be no gap between the damper 3 and the bottom of the groove, and they are in contact but not subjected to force. At this time, when the upper support plate 1 undergoes a certain degree of up and down displacement, the damper 3 is in contact with the bottom of the groove but is not subjected to pressure and tension, and no tensile or compressive deformation will occur.

[0047] Specifically, the grooves on the upper support plate 1 are arranged in a one-to-one correspondence with the dampers 3. Each damper 3 is inserted into a corresponding groove. Further, the same number of limit blocks 8 as the dampers 3 can be arranged, and the limit blocks 8 are arranged in a one-to-one correspondence with the dampers 3. Each limit block 8 is provided with a groove, and the top of each damper 3 is inserted into a groove of a limit block 8. Multiple independent grooves can also be arranged on a limit block 8. The specific number of limit blocks 8 is not limited, and the purpose is to have a one-to-one correspondence between the grooves and the dampers 3.

[0048] Furthermore, the detachable vertical movable connection structure between the damper 3 and the upper support plate 1 may also be other, for example, a guide rail may be connected to the bottom surface of the upper support plate 1, and the top of the damper 3 may be detachably connected to the guide rail in an upward and downward manner. Therefore, when the upper support plate 1 changes its upward and downward position, the upper support plate 1 and the guide rail may move up and down relative to the damper 3 as a whole, thereby preventing the damper 3 from being subjected to tension and pressure. The top of the damper 3 may also be detachably connected to an elastic member, and the elastic member is connected to the upper support plate 1; thereby, a detachable vertical movable connection between the damper 3 and the upper support plate 1 may also be achieved. The connection structure between the damper 3 and the upper support plate 1 is not specifically limited.

[0049] On the basis of the above embodiment, further, the width of the groove is greater than the width of the top of the damper 3. That is, there is a small gap or no gap between the top of the damper 3 inserted into the groove and the groove wall of the groove, so that when the upper support plate 1 moves left and right, the groove wall has a lateral constraint on the top of the damper; a certain distance is left between the top of the damper 3 and the notch of the groove, that is, the top of the damper 3 is inserted into the groove for a distance, to prevent the top of the damper from detaching from the groove when the swing is too large, and this gap can be determined according to the swing amount of the support design.

[0050] On the basis of the above embodiment, the damper 3 further comprises an energy dissipation section 3-2, the top of which is connected with an enlarged head 3-1, which is inserted into the groove. The cross-sectional dimension of the enlarged head 3-1 is larger than the cross-sectional dimension of the uppermost end of the energy dissipation section 3-2 of the damper 3, so as to prevent the limit block 8 from directly touching the energy dissipation section 3-2 of the damper 3 when swinging left and right, thereby ensuring that the damper 3 can fully exert its energy dissipation function.

[0051] The limit block 8 can be welded on the upper support plate 1. A groove is formed in the limit block 8. The size of the groove is slightly larger than the size of the enlarged head 3-1 of the damper 3, and its position corresponds to the position of the enlarged head 3-1 of the damper 3. The upper end of the damper 3 is a free end, which extends into the limit block 8 for a distance to prevent the upper end of the damper 3 from detaching from the limit block 8 when the support member swings too much. The width of the groove is larger than the diameter of the enlarged head 3-1 of the damper 3, and there is a gap between the enlarged head 3-1 and the bottom of the groove to ensure that when the support swings, the damper 3 can move freely up and down in the height direction of the damper 3 without being subjected to tension or pressure, but only to the lateral force generated by the limit block 8 on the enlarged head 3-1 of the damper 3 along the swinging direction. The damper 3 undergoes bending deformation to dissipate seismic energy.

[0052] On the basis of the above embodiment, further, the cross-sectional size of the bottom of the energy dissipation section 3 - 2 is larger than the cross-sectional size of the top.

[0053] On the basis of the above embodiment, further, the bottom of the damper 3 is connected with an anchoring connection plate 3 - 3 , and the anchoring connection plate 3 - 3 is connected to the lower support plate 4 .

[0054] refer to Figure 4 , the energy dissipation section 3-2 of the damper 3 may be conical. The cross section of the middle energy dissipation section 3-2 of the damper 3 is circular, and the cross section size gradually increases from top to bottom, and there is an enlarged head 3-1 at the top. The damper is subjected to bending moment, the bending moment at the bottom is larger, and the bending moment at the top is smaller. The energy dissipation section of the damper is set to have a cross section that is smaller at the top and larger at the bottom, which is beneficial to the damper's stress and saves materials.

[0055] The damper 3 includes a middle energy-absorbing section 3-2, an enlarged head 3-1 connected to the top of the energy-absorbing section 3-2, and an anchoring connecting plate 3-3 connected to the bottom of the energy-absorbing section 3-2. Figure 5 The damper 3 has an anchoring plate 3-3 at the bottom; the lower surface of the middle energy dissipation section 3-2 of the damper 3 and the anchoring plate 3-3 can be welded as a whole. The anchoring plate 3-3 has a reserved screw hole 10; the damper anchor bolt 7 has an external thread, which matches the reserved screw hole 10 on the anchoring plate 3-3; the lower support plate 4 has a reserved internal thread hole 9 at the corresponding position of the reserved screw hole 10 of the anchoring plate 3-3.

[0056] The damper anchor bolt 7 is screwed into and passed through the reserved screw hole 10, and further screwed into the reserved internal threaded hole 9 of the lower support plate 4 to tighten and anchor. When the damper 3 is damaged after the earthquake, the damper 3 anchor bolt 7 can be unscrewed, and the damaged damper 3 can be removed, and the new damper 3 can be easily replaced.

[0057] Further, the top and bottom surfaces of the enlarged head 3-1 of the damper 3 may be planes, and the side surface of the enlarged head 3-1 may be a spherical surface. Figure 6 and Figure 7The stopper 8 can be cylindrical; the groove can also be cylindrical, and the diameter of the groove is larger than the diameter of the enlarged head 3-1. The stopper 8 can be a steel cover, a steel block, etc., and is not specifically limited.

[0058] Furthermore, the damper 3 can be a steel energy absorber; the material of the damper 3 can be steel; meet certain strength requirements. The damper 3 can also be made of other materials, which are not specifically limited. The support member 2 is placed at the center of the lower support plate 4, and it is in hard contact with the lower support plate 4 without any connection measures. The support member 2 is also located at the center of the upper support plate 1.

[0059] On the basis of the above embodiments, further, the swing type self-resetting bearings in the above embodiments can be used not only as bridge bearings, but also as building structures and space structures. This embodiment takes a bridge structure as an example to illustrate the application of the above swing type self-resetting bearings. The bridge includes the swing type self-resetting bearings described in any of the above embodiments, and also includes an upper beam and a lower beam. The upper bearing plate 1 is connected to the upper beam, and the lower bearing plate 4 is connected to the lower beam.

[0060] Further, refer to Figure 8 In this embodiment, the swing type self-resetting support 16 is arranged between the upper beam and the lower beam. The upper support plate 1 is connected and fixed to the upper beam; the lower support plate 4 is connected and fixed to the lower cap beam 14 or the pier 15. The upper beam can be a prefabricated T beam 12. Figure 1 The upper support plate 1 and the lower support plate 4 are respectively provided with reserved holes 6. The support anchor bolts 11 can pass through the reserved holes 6 to be effectively anchored and connected with the upper beam body and the lower cap beam 14 or the pier 15.

[0061] Specifically, refer to Fig. 9 The support anchor bolt 11 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 body. The support anchor bolt 11 passes through the embedded threaded tube 13 in the lower support plate 4 and the lower cap beam 14 to anchor. The application diagram of the swing type self-resetting support 16 on the bridge is shown in the figure below. Figure 8 and Fig. 9 shown.

[0062] On the basis of the above-mentioned embodiments, in order to further solve the problems of low energy dissipation capacity of existing engineering structure supports in earthquakes, easy failure due to excessive shear deformation or large residual displacement, the rapid recovery of engineering structure functions after earthquakes is achieved. This embodiment provides a swing-type self-resetting support, which relates to the field of seismic isolation and shock reduction of engineering structures. The support 2 of the engineering structure of this embodiment swings under the action of an earthquake, and the damper 3 undergoes elastic-plastic deformation to dissipate seismic energy. Compared with the existing supports, this embodiment can transform the original shear deformation of the support into the swing deformation of the rigid body and the bending energy dissipation of the conical damper 3.

[0063] A swing type self-resetting bearing mainly includes an upper bearing plate 1, a support member 2, a damper 3, a lower bearing plate 4, a shear key 5, a damper anchor bolt 7, and a limit block 8; from bottom to top, the lower bearing plate 4, the support member 2 and the upper bearing plate 1 are arranged in sequence. The lower end of the damper 3 is welded to the anchoring connecting plate 3-3 as a whole, and the anchoring connecting plate 3-3 is anchored to the reserved internal threaded hole 9 on the lower bearing plate 4 by the damper anchor bolt 7. The upper end of the damper 3 has an enlarged head 3-1, which extends into the limit block 8 welded to the upper bearing plate 1 for a certain distance, and the groove size of the limit block 8 is larger than the size of the enlarged head 3-1. When the bearing swings, the enlarged head 3-1 is subjected to the horizontal lateral force generated by the swing of the limit block 8, causing the damper 3 to bend and deform, thereby dissipating the seismic energy. The swing self-resetting bearing can reduce the damage of the bearing by swinging, and concentrate the damage on the damper 3. The damper 3 can be easily replaced after being damaged.

[0064] The beneficial effects of this embodiment are: the support member 2 in the support is placed between the upper and lower support plates 4 without any connection measures, and its corners or four sides have shear keys 5 with triangular cross-sections, thereby ensuring rigid support and the rocking component, i.e., the support member, is prevented from sliding while being able to rock freely, avoiding excessive shear slippage and uncontrollable shear damage of traditional rubber bearings.

[0065] The lower end of the damper 3 is anchored to the lower support plate 4 through the anchoring connecting plate 3-3 and the damper anchor bolt 7, and the upper end is a free end. When the support sways, the damper 3 is not constrained in the height direction of the damper 3, and is only subjected to the horizontal lateral force generated by the grooved limit block 8 on the enlarged head 3-1 of the damper 3, and the earthquake energy is dissipated through the bending deformation of the damper 3. After the earthquake damage, the damaged damper 3 can be removed, which is convenient for replacing a new conical damper 3, and has good replaceability.

[0066] The swing of the support 2 can reduce the damage to the support 2 itself, and the swing support 2 has good self-reset ability under the deadweight of the superstructure; the damper 3 can enhance the swing energy dissipation capacity of the support. This embodiment adopts the swing deformation principle of the support, and the support simultaneously realizes the separation of bearing and energy dissipation functions. The self-reset swing deformation and energy dissipation of the support reduce the damage to the main structure, and improve the seismic toughness and recoverability of the engineering structure.

[0067] This embodiment has a simple structure, a clear force mechanism, is easy to implement, has a wide range of applications, and can be widely used in engineering structures. The damage after the earthquake is concentrated on the damper 3, which can be used after a little repair, ensuring that the traffic lifeline is not interrupted and speeding up the rescue time in the disaster area. In addition, this embodiment can also be used in the field of shock absorption and seismic isolation of construction engineering.

[0068] This embodiment converts the shear deformation mode of the existing bearing into a swing energy dissipation mode. The swinging of the support member 2 in the bearing and the bending of the damper 3 provide the bearing with self-resetting ability and energy dissipation ability. This embodiment breaks through the design concept of traditional bearings, has a flexible design, and clear force. It reduces the damage to the bearing by the swinging of the support member 2, and concentrates the damage on the damper 3. At the same time, it prevents the bearing from uncontrollable shear deformation and shear failure, and has good energy dissipation capacity and self-resetting ability. The damper 3 can be quickly replaced after damage, and has the characteristics of rapid repair. It can solve the problems of poor energy dissipation capacity, excessive shear deformation or excessive residual displacement of traditional bearings under earthquake action.

[0069] 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 swing type self-resetting support, comprising an upper support plate and a lower support plate, characterized in that: It also includes a support member and a damper, wherein the support member is placed on the lower support plate, the upper support plate is placed on the support member, a plurality of dampers are arranged on the periphery of the support member, the bottom of the damper is detachably fixedly connected to the lower support plate, and the top of the damper is detachably and movably connected to the upper support plate; The damper comprises an energy dissipation section, the cross-sectional size of which gradually increases from the top to the bottom; A plurality of shear keys are respectively connected on the bottom surface of the upper support plate and 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; 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; The bottom surface of the upper support plate is connected to a limit block at a position corresponding to the damper, the limit block is provided with a groove matching the top of the damper, the top of the damper is inserted into the groove, and there is a gap between the top of the damper and the bottom of the groove; The top of the energy-consuming section is connected with an enlarged head, and the enlarged head is inserted into the groove; The bottom of the damper is connected with an anchoring connection plate, and the anchoring connection plate is connected to the lower support plate.

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

3. The swing type self-resetting support according to claim 1, characterized in that: The width of the groove is greater than the width of the top of the damper.

Images