CN201593246U - An Improved Tensile Laminated Rubber Seismic Isolation Bearing - Google Patents

Abstract

The utility model relates to an improved tension-resistant laminated rubber shock-isolation support, which comprises an upper connecting plate (2), a lower connecting plate (3) and a laminated rubber elastic support clamped between the upper and lower connecting plates. The body (1) is characterized in that a plurality of cylindrical holes (10) parallel to the center line are evenly distributed around the vertical center line of the laminated rubber elastic body (1), and each column A tension spring (4) is arranged in the shape hole (10), and the upper connection plate (2) and the lower connection plate (3) at the two ends of each tension spring (4) are respectively provided with stepped holes (6), The steel wires of the spiral body (4-1) of the tension spring (4) are respectively extended to the two ends into the stepped hole (6), and a radially expanding T-shaped head (4-2) is arranged at the ends respectively. The T-shaped head (4-) and the step hole (6) move and pull the helix body (4-1) of the tension spring (4) between the upper connecting plate (2) and the lower connecting plate (3). The bearing described in the utility model can provide additional pulling force for the resettlement of the building after an earthquake.

Description

An Improved Tensile Laminated Rubber Seismic Isolation Bearing

technical field

The utility model relates to an anti-seismic (or vibration) building component, in particular to a laminated rubber shock-isolation bearing.

Background technique

The laminated rubber shock-isolation bearing is a commonly used two-dimensional shock-isolation component in anti-vibration engineering. The component is mainly composed of alternate laminated layers of rubber and steel plates molded and vulcanized between the upper and lower connecting plates. This laminated rubber seismic isolation bearing can not only bear constant loads such as buildings, but also has good horizontal deformation capacity and damping energy dissipation capacity, so it can effectively isolate buildings from the horizontal action of earthquakes. However, the tensile strength of the existing laminated rubber seismic isolation bearings is relatively poor, and it is difficult to meet the seismic isolation requirements of high-rise buildings, because the earthquake itself has multi-dimensional characteristics, especially in high-intensity areas of earthquakes, it is easy to cause high-rise Buildings sway or even overturn, requiring seismic isolation bearings to withstand huge tensile forces. Before the tensile stress reaches a certain value, the support behaves elastically, and if it exceeds this value, it shows yield. After passing the yield point, although there is no damage on the appearance, many holes will be generated inside due to the tensile deformation, which is serious. When the rubber layer breaks or the rubber/steel plate interface bond failure occurs.

On August 29, 2007, the State Intellectual Property Bureau authorized and announced the utility model patent of "a laminated rubber shock-isolating bearing with tensile effect" (the authorized announcement number is CN200940296). At least three flexible tensile members are evenly distributed circularly around the symmetrical center line. The middle part of the flexible tensile member is bent and placed in the center hole of the rubber pad, and the two ends are fixed on the upper and lower ends of the rubber pad. The stretching length is not greater than the tensile elastic deformation of the rubber pad. Although the above-mentioned utility model scheme can not only improve the anti-swaying or even overturning ability of high-rise buildings, but also can effectively protect the overall structure of the rubber pad and the shock-isolation bearing from being damaged, but because the flexible tensile member is a steel wire rope, Therefore obviously there are the following deficiencies: 1, the tensile elastic deformation of the steel wire rope is extremely small, and the damping energy dissipation effect cannot be produced when the building is thrown up or made to sway by an earthquake; It is difficult to control the degree of tightness. If it is tight, it will affect the shear deformation of the rubber pad. If it is loose, it will lose its protective effect on the rubber pad when it is pulled; 3. Since the initial steel wire rope under tension can freely extend the length, the early stiffness of the entire support is It is determined by the physical properties of the laminated rubber material, so it is impossible to preset the early stiffness of the bearing according to actual needs, and it is obviously impossible to control the wind load response of the building and resist micro-vibration; 4. When the displacement of the building When it is not within the tensile elastic deformation range of the steel wire rope, it is impossible to provide additional tension for the reset of the building. Therefore, when the mass of the building is large, it is often difficult to completely reset the building only by the stiffness of the rubber pad itself; In the center hole of the rubber pad, when the support is pulled on one side (such as when the building is overturned), the laminated rubber on the tensioned side cannot be protected, and the laminated rubber on the tensioned side of the support is still torn risk of cracking.

Contents of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide an improved tension-resistant laminated rubber shock-isolation bearing that can provide additional tension for building restoration.

The technical solution that the utility model solves the problems of the technologies described above is:

An improved tension-resistant laminated rubber shock-isolation bearing, the bearing includes an upper connecting plate, a lower connecting plate and a laminated rubber elastic body clamped between the upper and lower connecting plates, and the feature is that the laminated rubber elastic A plurality of cylindrical holes parallel to the center line are evenly distributed around the vertical center line in the body of the body, and a tension spring is arranged in each cylindrical hole, and the upper connecting plate and the lower connection plate at the two ends of each tension spring are correspondingly positioned. The connecting plates are respectively provided with stepped holes, and the steel wires of the helical bodies wound with tension springs respectively extend into the stepped holes at both ends, and a radially expanding T-shaped head is respectively arranged at the ends, and the T-shaped head is connected to the stepped hole. The hole dynamic fit pulls the spiral body hook of the extension spring between the upper connecting plate and the lower connecting plate.

In the shock-isolation bearing described in the present invention, the cylindrical hole can be cylindrical or square cylindrical, and the former is preferred. In order to prevent the steel plate in the laminated rubber elastic body from abutting against the helical body of the tension spring when the shock-isolation bearing is deformed, thereby affecting the normal operation of the tension spring, the inner diameter of the cylindrical hole should be larger than the outer diameter of the tension spring.

The shock-absorbing bearing described in the utility model, wherein, the T-shaped head at one end of the tension spring is formed by direct radial expansion of the steel wire head wound with the tension spring, and the T-shaped head at the other end is formed by winding the tension spring. The steel wire head is threaded and fixed with a countersunk head round nut. The improvement scheme above not only facilitates the installation of the tension spring, but also can adjust the pretension length of the tension spring through the countersunk head round nut, thereby making it more convenient to adjust the early tensile stiffness of the entire support.

In order to improve the early rigidity, to control the wind load response of the building and resist the micro-vibration of the foundation, several lead rods can be added in the laminated rubber elastic body of the improved tensile laminated rubber shock-isolation bearing described in the utility model. The lead rods vertically traverse the laminated rubber elastic body and are evenly distributed around the vertical centerline of the laminated rubber elastic body. When the lead rod is one, it is arranged in the center of the laminated rubber elastic body.

The improved tension-resistant laminated rubber shock-isolation bearing described in the utility model can be circular or rectangular, that is, when the laminated rubber elastic body is cylindrical, the upper and lower connecting plates can be circular steel plates , can also be a square steel plate; when the laminated rubber elastic body is a square, the upper and lower connecting plates are a square steel plate.

Since the improved tension-resistant laminated rubber shock-isolating bearing described in the utility model is formed by adding a tension spring in the laminated rubber elastic body on the basis of the common laminated rubber shock-isolating bearing, it not only significantly improves the The tensile strength of the rubber shock-isolation bearing, and the stiffness and elasticity of the tension spring provide the bearing with additional tension to reset the building. In addition, the utility model also has the following outstanding advantages and significant effects compared with the prior art: 1. The tensile elastic deformation of the tension spring is far greater than the tensile elastic deformation of the laminated rubber elastic body, and its tension and deformation It changes linearly, and there are no other uncertain factors, so the design calculation is convenient and it is easy to make the theoretical calculation consistent with the actual effect; 2. The preset tensile stress can be adjusted by adjusting the pre-stretching degree of the tension spring, so as to achieve the preset The purpose of the early tensile stiffness of the whole support; 3. The extension spring is arranged on the periphery of the laminated rubber elastic body. The load-bearing tensile force is the largest, which can effectively protect the laminated rubber elastic body in the middle.

Description of drawings

Figures 1 to 3 are structural schematic diagrams of a specific embodiment of the improved tensile laminated rubber shock-isolation bearing described in the present invention, wherein Figure 1 is the main view (A-A section of Figure 2), and Figure 2 is a top view , Fig. 3 is a B-B sectional view of Fig. 1 .

Fig. 4 is a structural schematic diagram of a specific embodiment of the connection structure between the tension spring and the upper connecting plate or the lower connecting plate according to the present invention.

Fig. 5 and Fig. 6 are structural schematic diagrams of another specific embodiment of the improved tensile laminated rubber shock-isolation bearing of the present invention, wherein Fig. 5 is a main view, and Fig. 6 is a C-C sectional view of Fig. 5 .

7 to 9 are structural schematic diagrams of yet another specific embodiment of the improved tensile laminated rubber shock-isolation bearing described in the present invention, wherein, FIG. 7 is a front view, FIG. 8 is a top view, and FIG. D-D section view.

Fig. 10 is a cross-sectional schematic diagram of another specific embodiment of the improved tensile laminated rubber shock-isolation bearing of the present invention.

Figures 11a to 11d are the working states of the tension springs of the improved tension-resistant laminated rubber shock-isolating bearing described in the present invention under various stress states, among which, Figure 11a is the natural state, and Figure 11b is the shear tension state, Fig. 11c is the state under compression, and Fig. 11d is the state under vertical tension.

Detailed ways

The utility model is further described in detail below in conjunction with the accompanying drawings, so that the public can better grasp the implementation means of the utility model and fully understand the beneficial effects of the utility model, but the utility model is not limited by the embodiments.

Referring to Figures 1 to 3, the entire support is composed of a laminated rubber elastic 1, an upper connecting plate 2, a lower connecting plate 3 and six tension springs 4, wherein the laminated rubber elastic 1 is clamped on the upper connecting plate 2 and the lower connecting plate 2. In the middle of connecting plate 3. The laminated rubber elastic 1 sandwiched between the upper connecting plate 2 and the lower connecting plate 3 is composed of a layer of rubber 1-1 and a steel plate 1-2 alternately stacked and then molded and vulcanized. During the molding and vulcanized process, its periphery is naturally Form the rubber protective layer 1-3; the center of the laminated rubber elastic 1 is provided with a central hole 5, and the axis around the central hole 5 is uniformly distributed with a cylindrical cross-section whose diameter is 20 mm larger than the outer diameter of the tension spring 4. Holes 10, each cylindrical hole 10 is provided with a tension spring 4; in the laminated rubber elastic 1, the steel plates 1-2 at the upper and lower ends of the laminated rubber elastic 1 are thicker than the middle, so that screw holes are set The upper connecting plate 2 and the lower connecting plate 3 are respectively fixedly connected with screws 7 . The upper connection plate 2 and the lower connection plate 3 corresponding to the two ends of the tension spring 4 are respectively provided with stepped holes 6, and the steel wires wound around the tension spring 4 are respectively extended to the two ends of the stepped holes 6, and the ends are provided with a Radially expanded T-shaped head 4-2, the T-shaped head 4-2 moves with the stepped hole 6 to pull the spiral body 4-1 of the tension spring 4 between the upper connecting plate 2 and the lower connecting plate 3 .

Referring to Fig. 5 and Fig. 6, this example is obtained by adding a lead rod 8 on the basis of the embodiment shown in Figs. 1-3. The specific improvement method is to expand the aperture of the central hole 5 in the embodiment shown in Figures 1 to 3 and press it into the lead rod 8, and the other structures are the same as in the embodiment shown in Figures 1 to 3.

Referring to Figures 7-9, this example is a support of a rectangular structure, which is a deformed product of the embodiment shown in Figures 5 and 6, and it differs from the embodiment shown in Figures 5 and 6 in that, The upper connecting plate 2 and the lower connecting plate 3 are both rectangular steel plates, and the laminated rubber elastic 1 is a hexahedron with a rectangular cross section. In addition to the central hole 5, eight columns with a circular cross section are arranged in the hexahedral body. Shaped holes 10, eight cylindrical holes 10 are evenly distributed around the axis of the central hole 5 and together with the central hole 5 form a 3×3 lattice, each cylindrical hole 10 is provided with a tension spring 4.

Referring to Fig. 10, this example is formed on the basis of the embodiment shown in Figs. 7 to 9 by making the following two changes, one of which is to increase the number of lead rods 8 from one to four, and make the cross section rectangular The vertical center line of the laminated rubber elastic 1 is distributed diagonally, and the second is that the cross-section of the eight cylindrical holes 10 is a square whose side length is 15mm larger than the extension spring 4 outer diameter.

The extension spring 4 in the above-mentioned embodiments shown in Figures 1 to 3, Figure 5 and Figure 6, Figures 7 to 9 and Figure 10 can also adopt the improved solution shown in Figure 4, which is specifically: the lower connecting plate 3 The T-shaped head 4-2 in the stepped hole 6 is formed by direct radial expansion of the steel wire head of the winding tension spring 4, and the T-shaped head 4-2 in the stepped hole 6 of the upper connecting plate 3 is formed in the described The steel wire head is threadedly connected with a countersunk head round nut 9 to form. In order to prevent countersunk head round nut from loosening for a long time, it is welded dead after being connected with the steel wire head thread of winding extension spring 4 and adjusted to the required degree of pretensioning.

The tension spring 4 is the core component to complete the inventive task of the utility model. The working principle of the tension spring 4 will be briefly introduced below in conjunction with FIG. 11a-11d and FIG.

Referring to Figure 11a and Figure 4, screw the countersunk round nut 9 in the stepped hole 6 of the upper connecting plate 3 during assembly, adjust the tensile stress of the tension spring 4 to the design value, and then connect the countersunk round nut 9 with the winding The steel wire head of extension spring 4 is welded dead. At this time, under the combined action of the tension springs 4 distributed in the laminated rubber elastic body 1, the entire vibration-isolation bearing obtains the required early tensile stiffness. Referring to Figure 11b, when the strong shear force generated by the earthquake is transmitted to the upper connecting plate 2 and the lower connecting plate 3, the tension spring 4 is inclined and elongated with the relative displacement of the upper connecting plate 2 and the lower connecting plate 3, once When the external force is cancelled, the internal tension of the extension spring 4 acts on the upper connecting plate 2 and the lower connecting plate 3 to provide pulling force for the reset of the building. Referring to Fig. 11c and Fig. 11d, when an earthquake causes the building to vibrate up and down or sway left and right, the entire isolation support must be subjected to tension and compression alternately. If under pressure, although the laminated rubber elastic 1 is compressed and shortened, but because the T-shaped head 4-2 is in motion with the stepped hole 6, all the pressure is borne by the laminated rubber elastic 1 (see Figure 11c); , under the action of the T-shaped head 4-2, the tension spring 4 immediately enters the working state to share the tension transmitted by the upper connecting plate 2 and the lower connecting plate 3 (see Figure 11d).

Claims (5)

1. An improved tension-resistant laminated rubber shock-isolation bearing, which includes an upper connecting plate (2), a lower connecting plate (3) and a laminated rubber elastic body clamped between the upper and lower connecting plates ( 1), it is characterized in that a plurality of cylindrical holes (10) parallel to the centerline are evenly distributed around the vertical centerline in the body of the laminated rubber elastic body (1), and each cylindrical hole (10) A tension spring (4) is provided, and the upper connection plate (2) and the lower connection plate (3) at the two ends of each tension spring (4) are respectively provided with stepped holes (6), and the tension spring ( 4) The steel wires of the helix (4-1) extend to both ends respectively into the stepped hole (6), and a radially expanding T-shaped head (4-2) is arranged at the ends respectively, and the T-shaped head (4-2) 2) Movably cooperate with the stepped hole (6) to hook the helix (4-1) of the tension spring (4) between the upper connecting plate (2) and the lower connecting plate (3). 2. An improved tension-resistant laminated rubber shock-isolation bearing according to claim 1, characterized in that the T-shaped head (4-2) at one end of the tension spring (4) is made of a wound The steel wire head of extension spring (4) directly radially expands to form, and the T-shaped head (4-2) of the other end is to be threaded on the wire head of winding extension spring (4) and fixes a countersunk round nut ( 9) Composition. 3. An improved tension-resistant laminated rubber shock-isolation bearing according to claim 1, characterized in that the inner diameter of the cylindrical hole (10) should be greater than the outer diameter of the tension spring (4). 4. An improved tension-resistant laminated rubber shock-isolation bearing according to claim 2, characterized in that the inner diameter of the cylindrical hole (10) should be greater than the outer diameter of the tension spring (4). 5. An improved tension-resistant laminated rubber shock-isolation bearing according to any one of claims 1 to 4, characterized in that it also includes several lead rods (8), and the lead rods (8) are vertically and horizontally The laminated rubber elastic body (1) is worn and evenly distributed around the vertical center line of the laminated rubber elastic body (1).

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