A swing support

Abstract

The present invention relates to the field of seismic isolation and shock absorption of engineering structures, and discloses a swing-type bearing, wherein the bearing includes an upper bearing plate and a lower bearing plate, and also includes a support member, the support member is placed on the lower bearing plate, the upper bearing plate is placed on the support member, the bottom surface of the upper bearing plate and the top surface of the lower bearing plate are respectively connected with a plurality of shear keys on the periphery of the support member, the distance between the lower end of the shear key connected to the upper bearing 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 bearing 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 swing-type bearing provided by the present invention can change the vibration frequency of the structure through the swinging of the support member in the bearing, and at the same time, the bearing has 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 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 swing type bearing. 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 bearing, which is used to solve or partially solve the problem that the existing bearing dissipates energy through shear deformation between rubber steel plate laminates, which easily leads to excessive shear deformation or excessive residual displacement.

[0006] An embodiment of the present invention provides a rocking support, comprising an upper support plate and a lower support plate, and also comprising a support member, wherein the support member is placed on the lower support plate, and the upper support plate is placed on the support member, and the bottom surface of the upper support plate and the top surface of the lower support plate are respectively connected to a plurality of shear keys 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.

[0007] 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.

[0008] On the basis of the above scheme, it also includes a steel energy absorber, the first end of which is connected to the outer wall of the support member, the second end of which is connected to the anchor member, and the bottom of the anchor member is connected to the lower support plate.

[0009] On the basis of the above solution, a plurality of the steel energy absorbers are symmetrically arranged on the periphery of the support member.

[0010] On the basis of the above solution, a portion of the steel energy absorber close to the first end is provided with a gradient section, and the cross-sectional area of ​​the gradient section close to the support member is larger than the cross-sectional area of ​​the portion away from the support member.

[0011] On the basis of the above solution, the steel energy absorber is movably connected to the anchor piece along the length direction of the steel energy absorber, and the steel energy absorber is connected to a limiting piece on a side of the anchor piece away from the support piece.

[0012] On the basis of the above solution, the limiting member includes a pin connected to the steel energy absorber or a nut matching the steel energy absorber.

[0013] On the basis of the above solution, the first end of the steel energy absorber is connected to the first steel plate, and the first steel plate is connected to the support member.

[0014] Based on the above solution, the bottom of the anchor is connected to the second steel plate, and the second steel plate is connected to the lower support plate.

[0015] Based on the above solution, the support members are respectively located at the center of the upper support plate and the lower support plate.

[0016] The embodiment of the present invention provides a swing-type bearing, in which the support member is placed between the upper and lower support plates without any connection measures, and the top and bottom of the support member are respectively provided with shear keys around, thereby ensuring that the support member cannot slide while being able to swing freely. The bearing undergoes swing deformation rather than shear deformation, thereby avoiding the excessive shear resistance and uncontrollable shear failure of traditional rubber bearings. Through the swinging of the support member in the bearing and the bending energy consumption of the steel energy absorber, the bearing damage can be reduced, the self-resetting ability and energy consumption capacity of the bearing can be enhanced, and the problems of low bearing energy consumption capacity, excessive shear deformation or large residual displacement in existing engineering structures can be overcome, thereby improving the seismic performance of the overall engineering structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A schematic diagram of the structure of a swing support according to an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the swing state of the swing type support according to an embodiment of the present invention;

[0020] Figure 3 For the embodiments of the present invention Figure 1 Schematic diagram of the cross section of the AA surface;

[0021] Figure 4 A schematic top view of a steel energy absorber in an embodiment of the present invention;

[0022] Figure 5 A schematic side view of a steel energy absorber in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the connection of the steel energy absorber in the embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the application of a swing bearing on a bridge in an embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of the partial connection of the rocking 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 member; 3. steel energy absorber; 31. first steel plate; 32. gradient section; 33. connection section; 34. limit member; 35. reserved threaded hole in the first steel plate; 4. lower bearing plate; 5. shear key; 6. reserved hole; 7. anchor; 71. web part of anchor; 72. flange part of anchor; 73. threaded hole in flange; 74. reserved circular hole in anchor; 8. first steel plate bolt; 9. reserved internal threaded hole; 10. second steel plate bolt; 11. support anchor bolt; 12. prefabricated T-beam; 13. embedded threaded pipe; 14. cap beam; 15. pier; 16. swing 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 rocking support, which includes an upper support plate 1 and a lower support plate 4. The rocking support also includes a support member 2, which is placed on the lower support plate 4, and the upper support plate 1 is placed on the support member 2. The bottom surface of the upper support plate 1 and the top surface of the lower support plate 4 are respectively connected to a plurality of shear keys 5 on the periphery of the support member 2. 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.

[0031] 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. The cross section of the support member 2 can be a circular cross section or a rectangular cross section; the material of the support member 2 can be a steel block, a steel tube concrete block or other rigid materials. The shear key 5 has a limiting effect on the support member around the top and bottom of the support member 2, which can prevent the support member 2 from relative sliding and twisting with the lower support plate 4 and the upper support plate 1. The shear key 5 can be welded to the upper support plate 1 and the lower support plate 4.

[0032] 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 horizontally, and the support member 2 can swing between the shear keys 5. This setting can avoid collision with the support member 2. 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.

[0033] The present embodiment provides a swing-type bearing, in which the support member 2 is placed between the upper and lower support plates without any connection measures. The top and bottom of the support member 2 are respectively provided with shear keys around them, thereby ensuring that the support member cannot slide while being able to swing freely. The bearing undergoes swing deformation rather than shear deformation, thereby avoiding the excessive shear slippage and uncontrollable shear failure of traditional rubber bearings. By swinging the support member in the bearing, the bearing damage can be reduced, the shear failure problem of the bearing in the existing engineering structure can be overcome, and the seismic performance of the overall engineering structure can be improved.

[0034] 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.

[0035] 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.

[0036] Furthermore, the shear key 5 is fixedly arranged at the upper and lower corners or around the support member 2. Figure 3 , a shear key 5 can be provided at the corner of the support member 2, and the shear key 5 at the corner of the support member 2 can play a good role in limiting the support member 2. Shear keys 5 can be provided at the corners of each side of the support member 2, thereby playing a role in limiting the support member 2 on each side, so that the support member 2 cannot slip in any direction.

[0037] 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.

[0038] On the basis of the above embodiments, further, referring to Figure 1 and Figure 2 In this embodiment, the shear key 5 is a columnar structure with a triangular cross section. An acute point of the shear key 5 contacts the support member 2. The cross section of the shear key 5 is triangular, and one of the acute points supports the end of the support member 2. The arranged shear key 5 fixes the horizontal position of the upper and lower surfaces of the support member 2 to prevent the support member 2 from slipping, and at the same time can ensure that the normal swing of the support member 2 is not restricted. The arranged shear key can also limit the torsion of the support member 2.

[0039] Specifically, the cross-sectional shape of the shear key 5 can be a right triangle, in which 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 movement of the support member 2, and is not specifically limited.

[0040] On the basis of the above embodiments, further, referring to Figure 1 and Figure 2 The rocking support in this embodiment also includes a steel energy absorber 3, the first end of which is connected to the outer wall of the support member 2, the second end of which is connected to the anchor 7, and the bottom of the anchor 7 is connected to the lower support plate 4. When the support member 2 rocked, the steel energy absorber 3 rocked at the same time. Due to the action of the anchor 7, the steel energy absorber 3 generates bending deformation to dissipate the seismic energy. The rocking support can reduce the damage of the support by rocking, and the damage is concentrated on the steel energy absorber 3. The steel energy absorber 3 can be easily replaced after being damaged.

[0041] Furthermore, the steel energy absorber 3 can be vertically connected to the support member 2, or cross-connected to the support member 2. The specific connection angle between the steel energy absorber 3 and the support member 2 can be flexibly set according to actual needs, so as to better realize the purpose of consuming energy through the steel energy absorber 3, and there is no specific limitation. The steel energy absorber 3 is made of steel, has a certain deformability, and the strength can meet certain support needs.

[0042] On the basis of the above embodiments, further, referring to Figure 3 A plurality of steel energy absorbers 3 are symmetrically arranged on the periphery of the support member 2. When the support member 2 sways, the steel energy absorbers 3 sway together with the support member 2 to generate bending deformation and dissipate earthquake energy.

[0043] On the basis of the above embodiment, further, in this embodiment, the steel energy absorber 3 is provided with a gradient section 32 at a position close to the first end. The cross-sectional area of ​​the gradient section 32 close to the support member 2 is greater than the cross-sectional area of ​​the position far from the support member 2. Figure 4 and Figure 5 The thickness of the gradient section 32 can remain unchanged, and the horizontal width tends to gradually increase to form a linear gradient structure, that is, the side of the gradient section 32 is linear, so that the gradient section 32 is a trapezoidal plate as a whole. The gradient section 32 can also be set as a frustum or arc gradient structure (that is, the side is arc-shaped), which is not specifically limited.

[0044] Furthermore, the first end of the steel energy absorber 3 is detachably fixedly connected to the support member 2; the second end of the steel energy absorber 3 is movably connected to the anchor 7; and the bottom of the anchor 7 is detachably fixedly connected to the lower support plate 4. The steel energy absorber 3 can be easily disassembled and replaced.

[0045] The steel energy absorber 3 is movably connected with the anchor 7 along the length direction of the steel energy absorber 3, and the steel energy absorber 3 is connected with a limiting member 34 on the side of the anchor 7 away from the support member 2. That is, the steel energy absorber 3 can move along the length direction relative to the anchor 7. Specifically, the anchor 7 is provided with a through hole, and the steel energy absorber 3 can pass through the anchor 7 from the through hole. The movable connection structure of the steel energy absorber 3 and the anchor 7 can also be other, with the purpose of realizing the movement of the steel energy absorber 3 and having a limiting and fixing effect on the steel energy absorber, which is not specifically limited.

[0046] Further, the first end of the steel energy absorber 3 is connected to the first steel plate 31, and the first steel plate 31 is connected to the support member 2. The first steel plate 31 and the support member 2 can be connected by bolts. The support member 2 and the first steel plate 31 can be provided with reserved threaded holes for connecting the two.

[0047] The bottom of the anchor 7 is connected to the second steel plate, and the second steel plate is connected to the lower support plate 4. The second steel plate and the lower support plate 4 can also be connected by bolts. The second steel plate and the lower support plate 4 can also be provided with reserved threaded holes for connecting the two.

[0048] Furthermore, the limiting member 34 includes a pin connected to the steel energy absorber 3 or a nut matched with the steel energy absorber 3 .

[0049] refer to Figure 4 and Figure 5 In this embodiment, the steel energy absorber 3 is divided into a variable cross-section energy absorption section, i.e., a gradient section 32, and a circular cross-section connecting section 33. One end of the gradient section 32 is welded to the first steel plate 31, and the other end is connected to the connecting section 33. The connecting section 33 of the steel energy absorber is threaded, and the connecting section 33 is matched with a limit nut with an adjustable position. The first steel plate 31 is provided with a first steel plate reserved threaded hole 35, which matches the size of the first steel plate bolt 8. The innermost end of the variable cross-section energy absorption section of the steel energy absorber 3 is welded to the first steel plate 31, and the first steel plate bolt 8 is screwed into the reserved hole in the support member 2 through the first steel plate reserved threaded hole 35 on the first steel plate 31.

[0050] refer to Figure 3 and Figure 6, the anchor 7 can be set as a T-shaped cross-section plate, and the T-shaped cross-section plate has a bottom anchor flange portion 72 and an anchor web portion 71 perpendicular to the anchor flange portion 72. A flange threaded hole 73 is opened in the anchor flange portion 72 to anchor the anchor 7 to the lower support plate 4. The anchor flange portion 72 is the second steel plate. That is, the anchor 7 and the second steel plate can be T-shaped as a whole. In other embodiments, the anchor 7 and the second steel plate can also be L-shaped or any other shape as a whole, so as to facilitate the connection between the second steel plate and the lower support plate 4 to achieve stable connection and fixation of the anchor 7, and no specific limitation is made. The anchor is a rigid plate, which does not move with the movement of the energy absorber and has a limiting effect on the steel energy absorber.

[0051] Further, refer to Figure 6 The second steel plate bolt 10 passes through the threaded hole 73 of the flange part and is further screwed into the reserved internal threaded hole 9 of the lower support plate 4. The web part 71 of the anchor has a reserved circular hole 74 for the anchor, and the size of the reserved circular hole 74 for the anchor is slightly larger than the size of the circular cross-section connecting section 33 of the steel energy absorber 3, so as to ensure that the connecting section 33 of the steel energy absorber can rotate slightly freely therein.

[0052] The innermost end of the energy absorbing section of the steel energy absorber 3 of this embodiment is anchored on the support member 2, and the other end is a free end, but there is a limiter 34 on the free end. When the support member 2 sways, the steel energy absorber 3 sways at the same time. Due to the action of the anchor 7, the steel energy absorber 3 bends and deforms to dissipate the seismic energy. The limiter 34 on the energy absorber connecting section 33 can prevent the steel energy absorber 3 from being pulled out of the circular hole 74 reserved in the anchor when the support member 2 sways too much during an earthquake. At the same time, it can also generate reverse pulling force on the support when the support sways too much, further improving the energy absorption capacity and self-resetting ability. After the earthquake damage, the damaged steel energy absorber 3 can be removed and replaced with a new one conveniently.

[0053] The cross section of the connecting section 33 of the steel energy absorber 3 of this embodiment is circular, which allows it to rotate slightly in the reserved circular hole 74 of the anchor, so as not to affect the deformation shape and energy dissipation effect of the energy dissipation section of the steel energy absorber 3. The energy dissipation section of the steel energy absorber 3, i.e., the gradual section 32, can limit the movement of the steel energy absorber 3, and at the same time, it is beneficial to increase the connection area with the support member 2, and increase the volume of the energy dissipation section, which is beneficial to better realize energy consumption.

[0054] Furthermore, in this embodiment, the steel energy absorber connection section 33 passes through the reserved circular hole 74 of the anchor for a distance, is threaded within a distance of the outermost end of the steel energy absorber connection section 33, and a limit nut is screwed in, which can prevent the steel energy absorber 3 from being pulled out of the reserved circular hole 74 of the anchor when the swing is too large, and can also generate reverse pulling force on the support member 2 when the swing is too large, further improving the energy dissipation capacity and self-reset ability. The position of the limit nut is adjustable, and different limit lengths can be set. Under the action of an earthquake, the steel energy absorber 3 bends and deforms to dissipate the seismic energy.

[0055] Furthermore, in this embodiment, the limit piece 34 at the end of the steel energy absorber connecting section 33 can be replaced by a limit pin; after the steel energy absorber connecting section 33 passes through the reserved circular hole 74 of the anchor for a certain distance, a hole can be punched on the steel energy absorber connecting section 33 and a pin can be inserted, which can also play a limiting role. At the same time, when the support member 2 swings too much in the extreme state, the pin will generate a reverse pulling force on it, thereby further improving the energy absorption capacity and self-resetting ability.

[0056] 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 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.

[0057] Furthermore, the swing bearings provided in the above embodiments can be used not only as bridge bearings, but also in building structures and space structures. This embodiment takes a bridge structure as an example to illustrate the application of the above swing bearings. The bridge includes an upper beam and a lower beam, an upper bearing plate is connected to the upper beam, and a lower bearing plate is connected to the lower beam. Figure 7 In this embodiment, the swing 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. Figure 8 , the upper bearing plate 1 and the lower bearing plate 4 are respectively provided with reserved holes 6. The bearing 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. Specifically, the bearing anchor bolts 11 pass through the upper bearing plate 1 and extend into the embedded threaded tube 13 in the upper prefabricated T-beam 12 to achieve the connection and fixation between the upper bearing plate 1 and the upper beam body. The bearing anchor bolts 11 pass through the embedded threaded tube 13 in the lower bearing plate 4 and the lower cap beam 14 and are anchored. The schematic diagram of the application of the swing bearing 16 on the bridge is shown in Figure 7 and Figure 8 shown.

[0058] On the basis of the above embodiments, further, the embodiments of the present invention provide a swing self-resetting bearing with a steel energy absorber, which relates to the field of seismic isolation and shock absorption of engineering structures. The bearing mainly includes an upper bearing plate 1, a rigid support and swing component, i.e., a support member 2, a steel energy absorber 3, a lower bearing plate 4, a shear key 5, an anchor 7, a first steel plate bolt 8, and a second steel plate bolt 10.

[0059] refer to Figure 6 , after the steel energy absorber connecting section 33 passes through the reserved circular hole 74 of the anchor for a certain distance, a limit piece 34 is set. The limit piece 34 can be provided in two ways. First, the steel energy absorber connecting section 33 passes through the reserved circular hole 74 of the anchor, threads are opened within a certain distance from the outermost end of the steel energy absorber connecting section 33, and a limit nut is screwed in to limit the steel energy absorber, and the position of the limit nut is adjustable, and different limit lengths can be set. Second, the limit piece at the end of the steel energy absorber connecting section 33 can be replaced by a limit pin; after the steel energy absorber connecting section 33 passes through the reserved circular hole 74 of the anchor for a certain distance, a hole can be punched in the steel energy absorber connecting section 33, and a pin can be inserted, which can also play a limiting role. The existence of the limiter 34 can prevent the steel energy absorber 4 from being pulled out of the reserved circular hole 74 of the anchor when the rigid support and the swing component swing too much during an earthquake. At the same time, it can also generate reverse pulling force on the rigid support and the swing component when they swing too much, further improving the energy absorption capacity and self-resetting ability.

[0060] The beneficial effects of this embodiment are as follows: a rocking self-resetting bearing with a steel energy absorber proposed in this embodiment undergoes rocking deformation rather than shear deformation under the action of an earthquake, and the seismic energy is dissipated by the steel energy absorber in the bearing. The structural vibration frequency can be changed by the rocking of the rigid support and the rocking components in the bearing, and at the same time, the bearing has good self-resetting ability under the deadweight of the upper structure of the upper bearing plate 1, thereby overcoming the shear failure problem of the bearing in the existing engineering structure during a strong earthquake, while enhancing the energy absorption capacity and self-resetting ability of the bearing, and improving the post-earthquake functional recoverability of the overall engineering structure.

[0061] The limiter of the steel energy absorber designed in this embodiment can prevent the steel energy absorber 4 from being pulled out of the circular hole 74 reserved for the anchor when the support member swings too much during an earthquake. At the same time, it can also generate reverse pulling force on the support member when the support member swings too much, thereby further improving the energy absorption capacity and self-resetting ability.

[0062] The rigid support and the rocking components of the bearing designed in this embodiment rock under the action of an earthquake, and the earthquake energy is dissipated through the elastic-plastic deformation of the steel energy absorber. Compared with the existing bearings, this embodiment can transform the original shear deformation of the bearing into rocking deformation and bending energy consumption of the steel energy absorber. Through the reasonable design of the rocking bearing with the steel energy absorber, the post-earthquake damage of the bearing can be concentrated on the steel energy absorber, and the damaged steel energy absorber can be easily replaced. This embodiment adopts the principle of rocking deformation of the bearing, and the bearing realizes the separation of the bearing and energy consumption functions at the same time. The self-resetting rocking deformation and energy consumption of the bearing reduce the damage to the main structure, and improve the seismic toughness and recoverability of the engineering structure.

[0063] This embodiment breaks through the traditional design concept of bridge bearings, and transforms the shear deformation mode of existing bearings into a swing energy dissipation mode. It has a flexible design and a clear force mechanism. It reduces the damage to the bearings through the swing of rigid supports and swing components, and concentrates the damage on the steel energy absorber, which can be used after a little repair, which is conducive to the rapid repair of engineering structures and ensures that the traffic lifeline is not interrupted, speeding up the rescue time in disaster areas. At the same time, it enables the bearings to avoid uncontrollable shear deformation and shear damage, and has good energy dissipation capacity and self-resetting ability. The steel energy absorber can be quickly replaced after damage, and has the characteristics of rapid repair. It can solve the problem that traditional bearings suffer shear damage under earthquakes and produce residual deformation that is difficult to recover. The swing-type bearing with a steel energy absorber has a simple structure and a wide range of applications. It can be widely used in engineering structures and is worthy of promotion and application in actual engineering.

[0064] 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 rocking support, comprising an upper support plate and a lower support plate, characterized in that: It also includes a support member, the support member is placed on the lower support plate, the upper support plate is placed on the support member, the bottom surface of the upper support plate and the top surface of the lower support plate are respectively connected to a plurality of shear keys at 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 shear key is a columnar structure with a triangular cross section, and an acute angle point of the shear key is in contact with the support member; It also includes a steel energy absorber, wherein a first end of the steel energy absorber is connected to the outer wall of the support member, a second end of the steel energy absorber is connected to an anchor, and a bottom of the anchor is connected to the lower support plate; The steel energy absorber is provided with a gradient section at a position close to the first end, and the cross-sectional area of ​​the gradient section close to the support member is larger than the cross-sectional area of ​​the position far from the support member; The steel energy absorber is movably connected to the anchor piece along the length direction of the steel energy absorber, and the steel energy absorber is connected to a limiting piece on a side of the anchor piece away from the support piece.

2. The rocking support according to claim 1, characterized in that: 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.

3. The rocking support according to claim 1, characterized in that: A plurality of the steel energy absorbers are symmetrically arranged on the periphery of the support member.

4. The rocking support according to claim 1, characterized in that: The limiting member includes a pin connected to the steel energy absorber or a nut matched with the steel energy absorber.

5. The rocking support according to claim 1, characterized in that: The first end of the steel energy absorber is connected to a first steel plate, and the first steel plate is connected to the support member.

6. The rocking support according to claim 1, characterized in that: The bottom of the anchor is connected to a second steel plate, and the second steel plate is connected to the lower support plate.

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