A friction damping vibration isolation rubber bearing

Abstract

The present invention relates to the field of building seismic isolation technology, and in particular to a friction damping seismic isolation rubber bearing; it comprises a seismic isolation rubber bearing and a friction damping device, a through hole is opened in the center of the seismic isolation rubber bearing, at least one friction damping device is placed in the through hole, and sealing plates are provided at both ends of the center of the seismic isolation rubber bearing or a locking plate is provided at one end thereof; the present invention effectively combines the seismic isolation rubber bearing and the friction damping device, and the friction damping device utilizes the friction force generated between the friction steel plate and the friction material when the bearing is in horizontal shear motion, thereby providing additional damping for the bearing, the friction material is made of conventional material, is pollution-free, and its performance is less affected by temperature, and can replace lead core seismic isolation rubber bearings and high damping rubber bearings, the friction force of the friction damping device is not affected by the seismic isolation rubber bearing, and the normal damping characteristics of the bearing can be realized; at the same time, it has higher pre-yield stiffness, and the yield force is adjustable, the wind load resistance is improved, and it has good engineering application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of building seismic isolation, in particular to a friction damping seismic isolation rubber bearing. Background Art

[0002] At present, seismic isolation rubber bearings are mainly divided into lead-core rubber seismic isolation bearings and high-damping rubber bearings. Although these two types of bearings can better accompany the deformation of rubber, consume seismic energy and limit the horizontal deformation of the bearings. However, there are also many problems, such as the damping energy dissipation characteristics will decrease to a certain extent over time, and the deformation is irreversible. At the same time, lead is a toxic metal substance, which is not only easy to cause harm to people during the production process, but also easy to pollute the environment during use. The temperature of lead-core seismic isolation rubber bearings and high-damping rubber bearings will rise after absorbing seismic energy, causing the mechanical properties to weaken and the damping ratio to decrease. In addition, lead-core seismic isolation rubber bearings and high-damping rubber bearings also have the disadvantages of low pre-yield stiffness, inability to adjust the yield force, poor wind load resistance, poor durability, high maintenance cost and inability to achieve constant damping characteristics.

[0003] Today, as people's awareness of energy conservation and environmental protection is gradually increasing and they generally pursue low-carbon, environmentally friendly, economical, and easy-to-maintain seismic isolation technologies, lead-core seismic isolation rubber bearings and high-damping rubber bearings can no longer adapt to the development concept of the new era.

[0004] Therefore, it is necessary to develop a friction damping seismic isolation rubber bearing to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to propose a friction damping seismic isolation rubber bearing, which effectively combines the seismic isolation rubber bearing and the friction damping device. The friction damping device utilizes the friction force generated between the friction steel plate and the friction material when the bearing is in horizontal shear motion, thereby providing additional damping for the bearing. The friction material is made of conventional materials, is pollution-free, and its performance is less affected by temperature. It can replace lead core seismic isolation rubber bearings and high damping rubber bearings. The friction force of the friction damping device is not affected by the seismic isolation rubber bearing, and the constant damping characteristics of the bearing can be achieved. The friction damping seismic isolation rubber bearing has a simple structure, low cost, higher pre-yield stiffness, and adjustable yield force, improved wind load resistance, and good engineering application prospects.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A friction damping seismic isolation rubber bearing comprises a seismic isolation rubber bearing body and a friction damping device. A through hole is opened in the center of the seismic isolation rubber bearing body, and at least one friction damping device is placed inside the through hole. Sealing plates are provided at both ends of the center of the seismic isolation rubber bearing body or a locking plate is provided at one end thereof.

[0008] Furthermore, the friction damping device includes several friction steel plates and pressure plates, which are sandwiched between the friction steel plates and arranged in layers. Friction materials that can generate friction are arranged between the friction steel plates and the pressure plates, and the thickness of the friction steel plates and pressure plates of the friction damping device must be greater than the thickness of the rubber layer of the seismic isolation rubber bearing.

[0009] Furthermore, an elastic element is provided at one end of the friction damping device, a locking plate with a bolt hole is provided on the upper surface of the elastic element, a sink and a threaded hole are provided on the upper flange plate, the pre-tightening bolt passes through the locking plate and is connected to the upper flange plate, and the elastic element is locked to provide the positive pressure required by the friction damping device.

[0010] Furthermore, the friction damping device includes at least two layers of friction steel plates and one layer of pressure plate, the number of friction steel plates is one more than that of pressure plate, a waist-shaped hole is provided in the center of the friction steel plate, and a first recessed groove is provided in the center of one side, a bolt hole is provided in the center of the pressure plate, and second recessed grooves are provided on both sides, a bolt hole of the same size as that of the pressure plate is provided in the center of the friction material, the friction material is placed in the second recessed grooves on both sides of the pressure plate to constrain the friction material around to fix the friction material, the pre-tightening bolts pass through the waist-shaped hole of the friction steel plate, the pressure plate and the bolt holes of the friction material respectively, and are fastened with nuts, the friction damping device is placed in the central through hole of the seismic isolation rubber support, and sealing plates are provided at both ends to be welded to the upper flange plate and lower flange plate of the support.

[0011] Furthermore, the friction steel plate 1 and the pressure plate 1 have the same diameter. The total length of the pre-tightening bolt is less than the total height of the friction damping device. Both ends of the pre-tightening bolt are sunken into the first countersunk groove of the friction steel plate 1. The waist-shaped holes of adjacent friction steel plates 1 are positioned perpendicular to each other, forming a cross shape. The width of the waist-shaped holes is the same as the diameter of the bolt holes in the pressure plate 1 and friction material 1. Furthermore, the friction damping device comprises a plurality of friction steel plates 2, friction steel plates 3, pressure plate 2, friction material 2, and a ball head. The ends of the ball head are respectively welded to the sealing plate and one side of the pressure plate 2. Furthermore, the friction steel plate 2 has a waist-shaped hole in its center. The friction steel plate 3 has a waist-shaped hole at one end and a second countersunk groove at the other end. The pressure plate 2 has a second countersunk groove on one side. The friction steel plates 2, friction steel plates 3, pressure plate 2, and friction material 2 are arranged in a stacked arrangement and are secured together with pre-tightening bolts, each of which is secured with a nut at the end of the pre-tightening bolt.

[0012] Furthermore, the friction materials 1 and 2 can be made of wear-resistant materials such as semi-metal, copper alloy, or metal-ceramic composite, and the sides of the friction materials are sealed with glass glue. Furthermore, disc springs or hard springs are installed between the first groove of the friction steel plate 1 and the nut, and between the pressure plate 2 and the nut.

[0013] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0014] 1. This invention effectively combines a seismic isolation rubber bearing with a friction damping device. The friction damping device utilizes the friction between the friction steel plate and the friction material during the bearing's horizontal shear motion to provide additional damping for the bearing. The friction material is conventional, pollution-free, and its performance is minimally affected by temperature. It can replace lead-core seismic isolation rubber bearings and high-damping rubber bearings. The friction force of the friction damping device is unaffected by the seismic isolation rubber bearing, achieving constant damping characteristics for the bearing.

[0015] 2. The friction damping seismic isolation rubber bearing has a simple structure and low cost. It also has higher pre-yield stiffness, adjustable yield force, improved wind load resistance, and good engineering application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of embodiment 1 of the present invention;

[0017] Figure 2 is a schematic structural diagram of embodiment 2 of the present invention;

[0018] Figure 3 yes Figure 2 Schematic diagram of the structure of the medium friction damping device;

[0019] Figure 4 yes Figure 3 Schematic diagram of the structure of the medium friction steel plate 1;

[0020] Figure 5 yes Figure 3 Schematic diagram of the structure of the medium pressure plate 1;

[0021] Figure 6 yes Figure 3 Schematic diagram of the structure of the friction material 1;

[0022] Figure 7 is a schematic structural diagram of embodiment 3 of the present invention;

[0023] Figure 8 yes Figure 7 Schematic diagram of the structure of the medium friction damping device;

[0024] Figure 9 yes Figure 8 Schematic diagram of the structure of the medium friction steel plate 2;

[0025] Figure 10 yes Figure 8 Schematic diagram of the structure of the medium friction steel plate 3;

[0026] Figure 11 yes Figure 8 A schematic structural diagram of the medium pressure plate 2;

[0027] Figure 12 yes Figure 8 Schematic diagram of the structure of the friction material 2.

[0028] In the figure: 1—friction steel plate 1, 2—friction steel plate 2, 3—friction steel plate 3, 4—pressure plate 1, 5—pressure plate 2, 6—friction material 1, 7—friction material 2, 8—pretightening bolt, 9—nut, 10—disc spring, 11—upper flange plate, 12—rubber layer, 13—skeleton plate, 14—lower flange plate, 15—sealing plate, 18—first sinking groove, 19—second sinking groove, 20—waist-shaped hole, 21—ball head, 22—elastic element, 23—locking plate. DETAILED DESCRIPTION

[0029] like Figure 1-12 In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] Example 1

[0031] like Figure 1 As shown, a friction damping seismic isolation rubber bearing includes a seismic isolation rubber bearing body and a friction damping device. A through hole is opened in the center of the seismic isolation rubber bearing body, and a friction damping device is placed inside the through hole. A sealing plate 15 is provided at the bottom end of the center of the seismic isolation rubber bearing body, and a locking plate 23 is provided at the top end.

[0032] The friction damping device includes 4 friction steel plates and 5 pressure plates. The pressure plates are arranged in layers between the friction steel plates. Friction materials that can generate friction are arranged between the friction steel plates and the pressure plates. The thickness of the friction steel plates and pressure plates of the friction damping device must be greater than the thickness of the rubber layer 12 of the seismic isolation rubber bearing body.

[0033] An elastic element 22 is provided at one end of the friction damping device, and a locking plate 23 with a bolt hole is provided on the upper surface of the elastic element 22. The upper flange plate is provided with a sink and a threaded hole. The pre-tightening bolt 8 passes through the locking plate 23 and is connected to the upper flange plate 11. The elastic element 22 is locked to provide the positive pressure required by the friction damping device.

[0034] The working principle of this embodiment is as follows: the friction damping device is placed in the center of the seismic isolation rubber bearing body, and an elastic element 22 is placed on the top, and a locking plate 23 is provided on the upper surface of the elastic element 22. The pre-tightening bolt 8 passes through the locking plate 23 and is connected to the upper flange plate 11, thereby locking the elastic element 22 to provide the positive pressure required by the friction damping device. The friction damping device utilizes the friction force generated between the friction steel plate and the friction material when the bearing is in horizontal shear motion, thereby providing additional damping for the bearing.

[0035] The present invention effectively combines the seismic isolation rubber bearing body and the friction damping device. The friction damping device utilizes the friction force generated between the friction steel plate and the friction material when the bearing is in horizontal shear motion, thereby providing additional damping for the bearing. The friction material is made of conventional materials, is pollution-free, and its performance is less affected by temperature. It can replace lead core seismic isolation rubber bearings and high damping rubber bearings. The friction force of the friction damping device is not affected by the seismic isolation rubber bearing, and the constant damping characteristics of the bearing can be achieved. The friction damping seismic isolation rubber bearing has a simple structure and low cost. At the same time, it has higher pre-yield stiffness, and the yield force is adjustable, the wind load resistance is improved, and it has good engineering application prospects.

[0036] Example 2

[0037] like Figure 2-6 The friction damping seismic isolation rubber bearing shown includes a seismic isolation rubber bearing body and a friction damping device. A through hole is opened in the center of the seismic isolation rubber bearing body, and four friction damping devices are placed inside the through hole. Sealing plates 15 are provided at both ends of the center of the seismic isolation rubber bearing body.

[0038] Each friction damping device includes two layers of friction steel plates 1 and one layer of pressing plate 4. The number of friction steel plates 1 is one more than that of pressing plate 4. A waist-shaped hole 20 is provided in the center of the friction steel plate 1, and a first sunken groove 18 is provided in the center of one side. A bolt hole is provided in the center of the pressing plate 4, and second sunken grooves 19 are provided on both sides. A bolt hole of the same size as that of the pressing plate 4 is provided in the center of the friction material 6. The friction material 6 is placed in the second sunken grooves 19 on both sides of the pressing plate 4. The pre-tightening bolts 8 pass through the waist-shaped hole 20 of the friction steel plate 1, the bolt holes of the pressing plate 4 and the friction material 6 respectively, and are tightened with The nut 10 is tightened to connect, the friction steel plate 1 and the pressure plate 4 have the same diameter size, the total length of the pre-tightening bolt 8 is less than the total height of the friction damping device, and the two ends of the pre-tightening bolt 8 should be sunk into the first sinking groove 18 of the friction steel plate 1, the position relationship of the waist-shaped holes 20 of adjacent friction steel plates 1 are perpendicular to each other, forming a cross shape, and the width of the waist-shaped hole 20 is the same as the diameter of the bolt hole of the pressure plate 4 and the friction material 6. The friction material 6 adopts a semi-metallic wear-resistant material, and the side of the friction material is provided with glass glue sealing. A disc spring 10 is provided between the first sinking groove 18 of the friction steel plate 1 and the nut 9.

[0039] The working principle of this embodiment is as follows: the friction damping device is placed in the center of the seismic isolation rubber bearing body, and sealing plates 15 are provided at both ends of the center hole. The positive pressure required by the friction damping device is provided by the pre-tightening bolts 8, and the friction force provided by the friction damping device can be changed by adjusting the torque value of the pre-tightening bolts 8. The friction damping device utilizes the friction force generated between the friction steel plate and the friction material when the bearing is in horizontal shear motion, thereby providing additional damping for the bearing.

[0040] The present invention effectively combines the seismic isolation rubber bearing and the friction damping device. The friction damping device utilizes the friction force generated between the friction steel plate and the friction material when the bearing is in horizontal shear motion, thereby providing additional damping for the bearing. The friction material is made of conventional material, is pollution-free, and its performance is less affected by temperature. It can replace the lead core seismic isolation rubber bearing and the high-damping rubber bearing. The friction force of the friction damping device is not affected by the seismic isolation rubber bearing, and the constant damping characteristics of the bearing can be achieved. The friction damping seismic isolation rubber bearing has a simple structure and low cost. At the same time, it has a higher pre-yield stiffness, and the yield force is adjustable, the wind load resistance is improved, and it has good engineering application prospects.

[0041] Example 3

[0042] like Figure 7-12 As shown, a friction damping seismic isolation rubber bearing includes a seismic isolation rubber bearing and a friction damping device. A through hole is opened in the center of the seismic isolation rubber bearing, and a friction damping device is placed inside the through hole. Closing plates 15 are provided at both ends of the center of the seismic isolation rubber bearing.

[0043] The friction damping device includes 1 friction steel plate 2, 2 friction steel plates 3, 3 pressure plates 2, 4 friction materials 7 and 2 ball heads 21. The two ends of the ball head 21 are welded to the sealing plate 15 and one side of the pressure plate 2, 5 respectively. A waist-shaped hole 20 is provided in the center of the friction steel plate 2, a waist-shaped hole 20 is provided at one end of the friction steel plate 3, and a second recessed groove 19 is provided at the other end. A second recessed groove 19 is provided on one side of the pressure plate 2, 5. The friction steel plate 2, friction steel plate 3, pressure plate 2 and friction material 7 are arranged in layers, and are fastened together by a pre-tightening bolt 8. A nut 9 is provided at the end of the pre-tightening bolt 8. The friction material 2, 7 is made of copper alloy wear-resistant material, and the side of the friction material is sealed with glass glue. A disc spring 10 is provided between the pressure plate 2 and the nut 9.

[0044] The working principle of this embodiment is: the friction damping device is placed in the center of the seismic isolation rubber bearing body, and sealing plates 15 are provided at both ends of the center hole. The positive pressure required by the friction damping device is provided by the pre-tightening bolts 8, and the friction force provided by the friction damping device can be changed by adjusting the torque value of the pre-tightening bolts 8. The friction damping device uses the friction between the friction steel plate and the friction material when the bearing moves in horizontal shear motion, thereby providing additional damping for the bearing. This embodiment is provided with a ball head 21, which can enable the friction damping device to move freely when the seismic isolation rubber bearing body moves in any horizontal shear direction.

[0045] The present invention effectively combines the seismic isolation rubber bearing and the friction damping device. The friction damping device utilizes the friction force generated between the friction steel plate and the friction material when the bearing is in horizontal shear motion, thereby providing additional damping for the bearing. The friction material is made of conventional material, is pollution-free, and its performance is less affected by temperature. It can replace the lead core seismic isolation rubber bearing and the high-damping rubber bearing. The friction force of the friction damping device is not affected by the seismic isolation rubber bearing, and the constant damping characteristics of the bearing can be achieved. The friction damping seismic isolation rubber bearing has a simple structure and low cost. At the same time, it has a higher pre-yield stiffness, and the yield force is adjustable, the wind load resistance is improved, and it has good engineering application prospects.

[0046] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, numerous variations and modifications may be made to the components and / or layout of the subject combination arrangement. In addition to variations and modifications to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A friction damping seismic isolation rubber bearing, characterized by: It comprises a seismic isolation rubber support body and a friction damping device, wherein a through hole is provided at the center of the seismic isolation rubber support body, at least one friction damping device is placed inside the through hole, and sealing plates (15) are provided at both ends of the center of the seismic isolation rubber support body or a locking plate (23) is provided at one end thereof; The friction damping device comprises at least two layers of friction steel plates (1) and one layer of pressure plate (4), wherein the number of the friction steel plates (1) is one more than that of the pressure plate (4), the center of the friction steel plate (1) is provided with a waist-shaped hole (20), and the center of one side is provided with a first recessed groove (18), the center of the pressure plate (4) is provided with a bolt hole, and two sides are provided with second recessed grooves (19), the center of the friction material (6) is provided with a bolt hole of the same size as that of the pressure plate (4), the friction material (6) is placed in the second recessed grooves (19) on both sides of the pressure plate (4), the pre-tightening bolts (8) respectively pass through the waist-shaped hole (20) of the friction steel plate (1), the bolt holes of the pressure plate (4) and the friction material (6), and are fastened with nuts (9); The friction steel plate (1) and the pressure plate (4) have the same diameter, the total length of the pre-tightening bolt (8) is less than the total height of the friction damping device, and both ends of the pre-tightening bolt (8) should be sunk into the first sinking groove (18) of the friction steel plate (1), the waist-shaped holes (20) of adjacent friction steel plates (1) are perpendicular to each other to form a cross shape, and the width of the waist-shaped hole (20) is the same as the diameter of the bolt hole of the pressure plate (4) and the friction material (6); A disc spring (10) or a hard spring is provided between the first recess (18) of the friction steel plate (1) and the nut (9).

2. The friction damping seismic isolation rubber bearing according to claim 1, characterized in that: The friction material 1 (6) is made of semi-metal, copper alloy or metal-ceramic composite wear-resistant material, and the side of the friction material is provided with glass glue sealing.

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