Magnetic sensitive metal rubber isolation bearing with enhanced shear performance

Abstract

The application belongs to the technical field of structure shock absorption / damping, in particular to a magnetic sensitive metal rubber shock absorption support with reinforced shearing resistance. The application comprises a support body arranged between an upper structure and a lower structure, the support body is sequentially provided with an upper connecting steel plate connected with the upper structure, a supporting part, and a lower connecting steel plate connected with the lower structure from top to bottom; the supporting part is sequentially provided with a shearing resistance main body, a cavity layer, a supporting shell, a coil wound on the outer surface of the supporting shell, and a metal shell from inside to outside. The application is provided with the shearing resistance main body along the vertical direction of the metal rubber, under the action of external force, the pegs can constrain the 'waist drum' phenomenon of the metal rubber, provide shearing resistance, improve the overall shearing strength, and make the overall structure have good working stability under the action of earthquake, so that the support has good shock absorption function.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of engineering structure damping / isolation technology, and particularly relates to a magnetic sensitive metal rubber isolation bearing with enhanced shear resistance. BACKGROUND

[0002] An isolation bearing refers to a supporting device arranged for the purpose of isolation, and is a device for increasing an isolation layer between an upper structure and a foundation, installing a rubber isolation bearing, and achieving soft connection with the ground. Through such a technology, about 80% of the energy of an earthquake can be offset. For example, a laminated rubber bearing (or an isolation rubber bearing, a sandwich rubber pad, etc.). It is a structural component with small horizontal stiffness and large vertical stiffness, which can withstand large horizontal deformation and can be used as part of a load-bearing system.

[0003] In civil engineering, high-rise buildings are prone to damage, destruction and even collapse under the action of earthquakes. The use of traditional laminated rubber bearings has the following disadvantages: if rubber material is used, it will face the problems of poor durability and poor environmental adaptability, and the shear resistance relies on the connection generated by vulcanization of rubber and steel plate, which cannot provide more shear resistance. SUMMARY

[0004] In order to overcome the defects in the prior art, the present application provides a magnetic sensitive metal rubber isolation bearing with enhanced shear resistance. The present application can enhance the overall shear strength of the bearing.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The magnetic sensitive metal rubber isolation bearing with enhanced shear resistance comprises a bearing body arranged between an upper structure and a lower structure, the bearing body being sequentially provided from top to bottom with an upper connecting steel plate connected with the upper structure, a support part, and a lower connecting steel plate connected with the lower structure; the support part is sequentially provided from inside to outside with a shear main body, a cavity layer, a support shell, a coil wound on the outer surface of the support shell, and a metal shell; the top of the shear main body is connected with the upper connecting steel plate, and the bottom of the shear main body is connected with the lower connecting steel plate; the bottom of the support shell, the bottom of the coil, and the bottom of the metal shell are all connected with the lower connecting steel plate, and the top end of the support shell, the top end of the coil, and the top end of the metal shell are all not connected with the upper connecting steel plate, so that the top of the cavity layer is in communication with the outside; the inside of the shear main body is provided with a plurality of metal rubbers and a plurality of shear dowels.

[0007] Preferably, the shear main body is in a cylindrical shape; the shear main body is composed of a plurality of laminated steel plates and a plurality of metal rubbers, and the plurality of laminated steel plates and the plurality of metal rubbers are sequentially and spacedly arranged from top to bottom; a plurality of shear dowels are arranged on the upper and lower surfaces of each laminated steel plate, and the heads of the shear dowels are embedded in the dowel grooves on the adjacent metal rubbers.

[0008] Preferably, the top of the shear body is connected (such as welded) with the upper connecting steel plate through a steel block, and the bottom of the shear body is connected with the lower connecting steel plate through a steel block; the steel block is connected with the metal rubber through shear pegs, and the thickness of the steel block is greater than the thickness of the laminated steel plate; the steel block is a magnetically conductive steel material, such as martensitic stainless steel or pure iron, iron alloy, etc.

[0009] Preferably, the metal rubber is an elastic porous soft magnetic material formed by winding, processing and stamping of metal wires, such as pure iron wire, iron-silicon alloy, etc., where the soft magnetic material refers to a metal that has no magnetism by itself, but will exhibit magnetism under the action of a magnetic field, and the magnetism will disappear when the magnetic field is removed; and the single-layer height of the metal rubber is greater than the sum of the heights of the two shear pegs.

[0010] Preferably, the upper surface of the lower connecting steel plate is provided with an annular stamping die groove, and the inner diameter of the stamping die groove is the same as the outer diameter of the shear body.

[0011] Preferably, the bottom of the support shell, the bottom of the coil and the bottom of the metal shell are all embedded on the lower connecting steel plate through grooves, and the top of the support shell, the top of the coil and the top of the metal shell are flush.

[0012] Preferably, the upper connecting steel plate and the lower connecting steel plate are both circular steel plate structures, and a plurality of bolt holes are provided on the upper connecting steel plate and the lower connecting steel plate; the diameter of the upper connecting steel plate and the diameter of the lower connecting steel plate are both greater than the diameter of the shear body, because the coil, the support shell and the metal shell need to be arranged outside the shear body, so that the component forms a complete magnetic circuit.

[0013] Preferably, the plurality of bolt holes on the upper connecting steel plate are centrally symmetrically distributed, and the plurality of bolt holes on the lower connecting steel plate are centrally symmetrically distributed; the number of the bolt holes is 8, and the distance between the bolt holes and the center of the upper connecting steel plate is greater than the radius of the laminated steel plate.

[0014] Preferably, the upper connecting steel plate, the lower connecting steel plate, the laminated steel plate and the metal shell are all magnetically conductive steel materials, such as martensitic stainless steel or pure iron, iron alloy, etc.; the support shell and the stamping die shell (not shown) use non-magnetic materials.

[0015] Preferably, the coil is wound on the outer surface of the support shell, and the inner wall of the metal shell is attached to the coil.

[0016] The advantages of the present application are:

[0017] (1) The present application provides the shear body along the vertical direction in the metal rubber, under the action of external force, the shear pegs can constrain the "waist drum" phenomenon of the metal rubber, provide the shear capacity, improve the overall shear strength, and make the overall structure have good working stability under the action of earthquake, so that the support has good shock isolation function.

[0018] (2) The upper and lower top surfaces of the metal rubber in the application form shear bolt grooves during stamping, so that the contact area between the metal rubber material and the steel block is increased, and in the state of shear force, the shear bolt can disperse the extrusion caused by the groove wall of the upper and lower support plates, thereby enhancing the overall shear performance.

[0019] (3) The soft magnetic material is used as the manufacturing material of the metal rubber in the application; the metal rubber material made of the soft magnetic material is combined with a magnet, and is used on the laminated steel plate support, thereby enhancing the overall performance of the support; the shear bolt in the support can enhance the tensile strength and shear strength of the support, and can constrain the "waist drum" phenomenon of the metal rubber; the action of the magnetic field can change the stiffness of the isolation support, so that the isolation support realizes variable stiffness; in addition, the soft magnetic material is magnetized in the magnetic field, and the metal wires are attracted to each other, thereby increasing the contact points between the metal wires. Originally, the metal wires want to produce contact slip, and first change from the "isolated" state to the "contact" state, however, under the action of the magnetic field, part of the metal wires changes from the "isolated" state to the "contact" state, and under the action of the external force, the part of the metal wires will preferentially enter the "slip" state compared with the metal wires without the action of the magnetic field, so that the overall strain of the metal rubber with the action of the magnetic field is smaller than the overall strain of the metal rubber without the action of the magnetic field, and the overall stiffness of the metal rubber with the action of the magnetic field is larger. The addition of the magnetic field is generated by the external energized coil.

[0020] (4) The soft magnetic material in the application is easy to obtain, and the support has low cost and can realize variable stiffness according to the input current; the laminated steel plate plays a supporting role, and even if the support loses the magnetic field, the metal rubber itself can also well dissipate energy; the soft magnetic material has a stable magnetic reinforcement effect when there is a magnetic field; compared with the traditional rubber, the metal rubber has a longer service life.

[0021] (5) The shear bolt in the application can provide tensile strength to avoid the dispersion of the support due to the tension; under the condition of passing through the magnetic field, the coil can make the metal rubber coil in the support adhere more closely, the contact points are increased, and the energy dissipation effect is better; the application has compact structure, clear stress and reasonable structure, and has good practical value. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is a schematic diagram of the overall structure of the application.

[0023] Fig. 2 It is a schematic diagram of the local structure of the application.

[0024] Fig. 3 It is a schematic diagram of the vertical section structure of the application.

[0025] The meanings of the symbols in the drawings are as follows:

[0026] 1-Upper connecting steel plate, 21-Shear-resistant main body, 211-Layered steel plate, 212-Metal rubber, 213-Shear stud, 22-Cavity layer, 23-Support shell, 24-Coil, 25-Metal shell, 3-Lower connecting steel plate, 4-Bolt hole, 5-Steel block, 6-Stamping die groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0028] like Figs. 1-3 As shown, a magnetically sensitive metal-rubber seismic isolation bearing with enhanced shear resistance is installed between the upper and lower structures. The bearing body is block-shaped and includes metal rubber 212, laminated steel plates 211, upper connecting steel plate 1, lower connecting steel plate 3, steel block 5, shear studs 213, coil 24, supporting shell 23, and metal shell 25. Several metal rubbers 212 and several laminated steel plates 211 are stacked to form the shear-resistant main body 21, and the metal rubbers 212 and laminated steel plates 211 are spaced apart. The supporting shell 23, coil 24, and metal shell 25 are distributed outward from the center. A gap is left between the upper connecting steel plate 1 and the top of the supporting shell 23, coil 24, and metal shell 25, which allows the cavity layer 22 to communicate with the outside. The width of this gap is very small, only a few millimeters. The supporting shell 23 and metal shell 25 are fitted onto the lower connecting steel plate 3 and connected to the lower connecting steel plate 3 by bolts.

[0029] Specifically, the adjacent metal rubber 212 and the laminated steel plate 211 are engaged by shear studs 213. That is, the metal rubber 212 has stud grooves, and the shear studs 213 fixed on the laminated steel plate 211 are embedded in the stud grooves to connect the metal rubber 212 and the laminated steel plate 211. The shear studs 213 and the laminated steel plate 211 are made of the same material, have a raised appearance, and are integral with the shear-resistant main body 21. The laminated steel plate 211 enhances the overall vertical compressive strength of the support.

[0030] The metal rubber 212 in this invention is not stainless steel in the traditional sense, but a soft magnetic material. Specifically, it is made by using soft magnetic material to make metal wires (or metal wires with a diameter of up to 0.1 mm) with very small diameters, and then making metal rubber 212 through a specific process. It can be understood that under the action of a magnetic field, the material will have a magnetic strengthening effect, and the metal wires will attract each other, resulting in an increase in contact points. Its compressive and shear resistance is greatly improved, and its energy storage and energy dissipation capabilities are improved.

[0031] Further, the support shell 23 is in the shape of a cylindrical shell, is not connected with the upper connecting steel plate 1, is embedded with the lower connecting steel plate 3 through a slot, and the outer wall is attached to the coil 24. A gap is provided between the inner wall of the support shell 23 and the shear body 21, that is, the gap is the cavity layer 22. The cavity layer 22 facilitates the formation of a magnetic circuit and is not affected by the deformation of the internal metal rubber 212. Specifically, if the coil 24 is in contact with the internal structure (shear body 21) and tightly attached, the internal horizontal displacement will cause the coil 24 to displace and damage the original structure when the device is in action. The cavity layer 22 can prevent the support from affecting the distribution of the coil 24 during the deformation process, thereby preventing partial damage to the coil 24 caused by the deformation of the support.

[0032] The coil 24 is wound around the outer surface of the support shell 23, and the height of the coil 24 is the same as the height of the support shell 23. The bottom of the coil 24 is embedded with the lower connecting steel plate 3 through a slot. The metal shell 25 is in the shape of a cylindrical shell, is not connected with the upper connecting steel plate 1, is embedded with the lower connecting steel plate 3 through a slot, and is attached to the outer surface of the coil 24. After the coil 24 is energized, according to the right-hand screw rule, a magnetic circuit can be formed in the support.

[0033] Further, the upper connecting steel plate 1 and the lower connecting steel plate 3 are both in the shape of a plate, and the outer contour in plan view is circular. A plurality of bolt holes 4 are provided on the upper connecting steel plate 1 and the lower connecting steel plate 3, and the upper structure and the lower structure are connected by penetrating the bolt holes 4 with bolts. The upper connecting steel plate 1 and the lower connecting steel plate 3 are fixedly connected with the shear body 21 through steel blocks 5. The upper connecting steel plate 1 and the lower connecting steel plate 3 are also embedded with shear dowels 213 at the attachment positions of the metal rubber 212. The number of the bolt holes 4 is 8, which are centrally symmetrically distributed on the upper connecting steel plate 1 and the lower connecting steel plate 3. The distance from the bolt holes 4 to the center of the upper connecting steel plate 1 is greater than the radius of the laminated steel plate 211, so that the magnetic circuit in the steel block 5 is not damaged. If the distance from the bolt holes 4 to the center of the upper connecting steel plate 1 is less than the radius of the laminated steel plate 211, the magnetic circuit in the steel block 5 may be damaged.

[0034] The steel block 5 is in the shape of a cylinder, and the surface connected with the metal rubber 212 is also provided with shear dowels 213 in the shape of protrusions. The steel block 5 is connected with the metal rubber 212 through the shear dowels 213.

[0035] The upper connecting steel plate 1, the lower connecting steel plate 3, the steel block 5, the laminated steel plate 211, the support shell 23, and the metal shell 25 are all made of steel.

[0036] Except special description, each component size requirement sets according to need; The thickness of steel block 5 is thickest, the purpose is to make magnetic field from here after forming more uniform magnetic field; The layer thickness of internal metal rubber 212 is not much different from the layer thickness of laminated steel plate 211 (the height of shear bolt 213 is not counted), the layer of laminated steel plate 211 is slightly thinner (all refer to single layer thickness), the single layer height of metal rubber 212 is more than twice the height of shear bolt 213; The thickness of support shell 23 is thinner, only plays the role of supporting coil 24, adopts non-magnetic metal, such as austenitic stainless steel, aluminum alloy etc.; The thickness of coil 24 is set according to demand; The thickness of metal shell 25 is thicker, the purpose is to make the whole component complete magnetic circuit; The thickness of upper connecting steel plate 1 and lower connecting steel plate 3 is designed according to demand. The shear bolt 213 cannot be set on the metal rubber 212, should be set on the layer surface of laminated steel plate 211, and the shear bolt 213 on the upper and lower surfaces of the same laminated steel plate 211 should be arranged alternately, that is, when looking at the laminated steel plate 211, the shear bolt 213 on the upper and lower surfaces should not coincide, the reason is: first, the shear bolt 213 cannot be set on the surface of the metal rubber 212; second, if the shear bolt 213 on the upper and lower surfaces of the laminated steel plate 211 is set at the same position (when looking down), it will cause the metal rubber 212 to be thinner at this place.

[0037] The lower connecting steel plate 3 is reserved with a stamping die groove 6. In the process of forming the metal rubber 212, a "stamping forming" step is needed, and the stamping die groove 6 is used to place the stamping die shell (not shown) so that the metal rubber 212 will not bulge during stamping, and the stamping die shell will not move after use; And can prevent the metal rubber 212 from bulging (i.e. waist drum phenomenon).

[0038] The principle of enhancing the shear performance of the support is: under the action of the magnetic field, the soft magnetic wire inside the metal rubber 212 made of special material-soft magnetic material will produce magnetic strengthening effect, and then the contact points of the internal metal wire will increase, and the energy consumption capacity of the whole support will be enhanced.

[0039] Specifically, under the action of external force, the upper connecting steel plate 1, the lower connecting steel plate 3 and the laminated steel plate 211 provide support force, the metal rubber 212 is an elastic porous material formed by winding, processing and stamping of metal wires, and can provide good shear resistance and compression resistance. Since the support shell 23, the coil 24 and the metal shell 25 are not in contact with the upper connecting steel plate 1, the support can have a certain horizontal deformation when subjected to shear force, dissipate part of the energy, and have a shock isolation and buffering effect on the upper structure. The shear bolt 213 restrains the deformation of the metal rubber 212 when the support is subjected to compression and shear, and provides a certain shear resistance, further improving the overall shear resistance of the support. In this way, the upper structure can be better protected, the stability of the overall structure under shear action is improved, and the shock isolation effect is achieved; at the same time, when the coil 24 is in a magnetic field, the metal wire ring in the internal metal rubber 212 can be more closely attached, the contact points are increased, and the energy dissipation effect is better.

[0040] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A magnetically sensitive metal-rubber seismic isolation bearing with enhanced shear resistance, comprising a bearing body disposed between an upper structure and a lower structure, characterized in that, The support body is provided from top to bottom with an upper connecting steel plate (1) connected to the upper structure, a support part, and a lower connecting steel plate (3) connected to the lower structure; the support part is provided from the inside to the outside with a shear-resistant body (21), a cavity layer (22), a support shell (23), a coil (24) wound on the outer surface of the support shell (23), and a metal shell (25); the top of the shear-resistant body (21) is connected to the upper connecting steel plate (1), and the bottom of the shear-resistant body (21) is connected to the lower connecting steel plate (3). The connecting steel plate (3) is connected; the bottom of the supporting shell (23), the bottom of the coil (24) and the bottom of the metal shell (25) are all connected to the lower connecting steel plate (3), and the top of the supporting shell (23), the top of the coil (24) and the top of the metal shell (25) are not connected to the upper connecting steel plate (1), so that the top of the cavity layer (22) is connected to the outside; the shear-resistant body (21) is provided with several metal rubber (212) and several shear studs (213) inside. The shear-resistant body (21) is cylindrical; the shear-resistant body (21) is composed of several laminated steel plates (211) and several metal rubbers (212), the several laminated steel plates (211) and several metal rubbers (212) are arranged alternately from top to bottom, and several shear studs (213) are provided on the upper and lower surfaces of each laminated steel plate (211), and the head of the shear stud (213) is embedded in the stud groove on the adjacent metal rubber (212); The top of the shear-resistant body (21) is connected to the upper connecting steel plate (1) via a steel block (5), and the bottom of the shear-resistant body (21) is connected to the lower connecting steel plate (3) via a steel block (5); the steel block (5) is connected to the metal rubber (212) via a shear stud (213); the steel block (5) is made of magnetically conductive steel. The metal rubber (212) is an elastic porous soft magnetic material made by winding, processing and stamping metal wires.

2. The magnetically sensitive metal-rubber seismic isolation bearing with enhanced shear resistance according to claim 1, characterized in that: The height of a single layer of metal rubber (212) is greater than the sum of the heights of the two shear studs (213).

3. The magnetically sensitive metal-rubber seismic isolation bearing with enhanced shear resistance according to claim 1, characterized in that: The upper surface of the lower connecting steel plate (3) is provided with an annular stamping die groove (6), the inner diameter of which is the same as the outer diameter of the shear-resistant body (21).

4. The magnetically sensitive metal-rubber seismic isolation bearing with enhanced shear resistance according to claim 1, characterized in that: The bottom of the supporting shell (23), the bottom of the coil (24) and the bottom of the metal shell (25) are all embedded on the lower connecting steel plate (3), and the top of the supporting shell (23), the top of the coil (24) and the top of the metal shell (25) are flush.

5. The magnetically sensitive metal-rubber seismic isolation bearing with enhanced shear resistance according to claim 1, characterized in that: The upper connecting steel plate (1) and the lower connecting steel plate (3) are both circular steel plate structures, and both the upper connecting steel plate (1) and the lower connecting steel plate (3) are provided with several bolt holes (4); the diameter of the upper connecting steel plate (1) and the diameter of the lower connecting steel plate (3) are both larger than the diameter of the shear-resistant main body (21).

6. The magnetically sensitive metal-rubber seismic isolation bearing with enhanced shear resistance according to claim 5, characterized in that: The bolt holes (4) on the upper connecting steel plate (1) are centrally symmetrically distributed, and the bolt holes (4) on the lower connecting steel plate (3) are centrally symmetrically distributed; the number of bolt holes (4) is 8, and the distance of the bolt holes (4) from the center of the upper connecting steel plate (1) is greater than the radius of the stacked steel plate (211).

7. The magnetically sensitive metal-rubber seismic isolation bearing with enhanced shear resistance according to claim 4, characterized in that: The upper connecting steel plate (1), the lower connecting steel plate (3), the laminated steel plate (211), and the metal shell (25) are all made of magnetically conductive steel; the supporting shell (23) is made of non-magnetically conductive steel.

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