CN108915093B - Tensile enhancement type rubber shock insulation support - Google Patents

Abstract

The utility model relates to a tensile-reinforced rubber vibration isolation bearing, which belongs to the field of vibration isolation of structural engineering. The invention enhances its tensile deformation resistance without affecting other mechanical properties by arranging vertical slits at specific positions of the rubber layer, thereby forming a tensile-enhanced rubber shock isolation bearing. In the invention, vertical gaps are arranged near the symmetry axis in the middle of the rubber layer between the steel plate layers of the shock-isolating bearing, and energy dissipation components are filled at the symmetry axis after all the steel plate layers and the rubber layers are formed, and finally sealing plates are arranged at the upper and lower ends. . The vertical deformation of the seismic isolation bearing of the invention is large, and the number of gaps can be set according to the deformation requirements; the set gap does not affect its vertical rigidity, vertical bearing capacity, horizontal shear rigidity and deformation; the invention is suitable for irregular and complex structures. Seismic isolation design and analysis. The invention has simple structure, convenient construction, no increase in material cost, good seismic performance, and good tensile performance and seismic performance.

Description

A tensile reinforced rubber shock isolation bearing

technical field

The invention relates to a structural seismic isolation bearing, belonging to the field of structural engineering seismic isolation.

Background technique

With the development of economy, there are many structures with irregular plane and space. It is necessary to adopt seismic isolation technology to reduce their seismic requirements and improve their seismic safety performance. However, this kind of seismic isolation structure often suffers from the tension of the seismic isolation layer. For example, (1) the height to width ratio of the seismic isolation structure is relatively large, and when the earthquake is large, the upper structure will sway and shake, which will cause some parts of the rubber bearing to be tensioned; ( 2) The plane layout of the seismic isolation structure is irregular, and the eccentric torsion effect is obvious during the earthquake, which will cause some rubber bearings to be stretched; (3) The simultaneous action of vertical earthquake and horizontal earthquake may cause some rubber bearings to be in a tensile state However, the tensile capacity of the rubber isolation bearing is very low. Under the simultaneous action of the horizontal and vertical earthquakes of rare earthquakes, the tensile stress greater than 1Mpa may cause damage to the bearing, and if it continues to increase, it may cause the rubber layer of the bearing to be damaged. Fracture damage, affecting the safety of the structure.

In order to prevent the rubber vibration isolation bearing from being damaged by tension, some researchers have mainly developed various anti-tension devices attached around the vibration isolation bearing to limit the tensile deformation of the rubber vibration isolation bearing from the perspective of "blocking". The tensile strength of the anti-tension device is strong enough to resist the tensile deformation of the structure. The idea of "release" is adopted to develop a tensile-enhanced seismic isolation bearing from the perspective of improving the deformation capacity of the rubber isolation bearing. The development of seismic isolation technology is of great significance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a tensile-enhanced rubber vibration isolation bearing, to solve the technical problem that the vibration isolation structure is stretched at the vibration isolation bearing, and the vibration isolation bearing is damaged or even broken.

To achieve the above object, the present invention adopts the following technical solutions:

A tensile-enhanced rubber vibration-isolating bearing comprises a steel plate layer, a rubber layer, a vertical gap, an energy-consuming component and a sealing plate. For energy-consuming components, both sides of the symmetrical plane are cross-laminated structures of steel plates and rubber layers. The steel plate and rubber layers are marked as horizontal planes, and the symmetrical planes are vertical planes. seams; sealing plates are respectively provided at the upper and lower ends of the tensile-enhanced rubber vibration isolation bearing;

Each of the rubber layers is provided with through seams with parallel symmetrical planes in the middle to vertically disconnect the same layer of rubber. The steel sheet layers are not disconnected.

Each rubber layer on each side of the symmetry plane may be provided with n through-slots, where n is a natural number of 1-3.

The energy-consuming parts are lead cores or other metal materials with low yield point (the strength is lower than that of general steel, which is 345 MPa).

Compared with the prior art, the present invention has the following features and beneficial effects:

(1) Under the same tensile force, the vertical deformation of the seismic isolation bearing of the present invention is large, and the number of slits can be set according to the deformation requirements by setting n slits, which can improve the deformation capacity by n times.

(2) Under other stress conditions (compression, shear, etc.), the set gap does not affect its vertical stiffness, vertical bearing capacity, and horizontal shear stiffness and deformation, that is, it has the same vertical stiffness as the ordinary isolation bearing. and horizontal mechanical properties.

(3) The material cost is not increased, the structure is simple, and the seismic performance is good.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings.

FIG. 1 is a schematic front cross-sectional view of a tensile-reinforced rubber shock-isolating bearing of the present invention.

Figure 2 is a schematic diagram of a front section of a common rubber vibration isolation bearing.

3 is a schematic diagram of the deformation of the front section of the tensile-enhanced rubber shock-isolating bearing of the present invention under the action of the tensile force F. FIG.

Figure 4 is a schematic diagram of the normal cross-sectional deformation of the ordinary rubber isolation bearing under the action of the tensile force F.

5 is a schematic diagram of the deformation of the front section of the tensile-enhanced rubber vibration isolator bearing of the present invention under the action of pressure F. FIG.

Figure 6 is a schematic diagram of the normal cross-sectional deformation of an ordinary rubber isolation bearing under the action of pressure F.

Reference numerals: 1-steel plate layer, 2-rubber layer, 3-vertical slit, 4-energy-consuming part, 5-sealing plate.

Detailed ways

The present invention will be further described below in conjunction with the examples, but the present invention is not limited to the following examples.

Example 1

A rubber layer (2) is formed between the steel plate layers (1) of the shock-isolating bearing, and vertical gaps (3) are arranged in the middle of each rubber layer (2) on both sides of the symmetry plane, and all the steel plate layers (1) and the rubber layers are provided with vertical gaps (3). (2) After forming, the energy-consuming parts (4) are filled at the axis of symmetry, and finally sealing plates are arranged at the upper and lower ends.

Fig. 1 is the front sectional schematic diagram of the tensile-enhanced rubber vibration isolation bearing of the present invention; Fig. 2 is the frontal cross-sectional schematic diagram of the ordinary rubber vibration isolation bearing; Fig. 3 is the tensile enhanced rubber vibration isolation bearing of the present invention in tension F Schematic diagram of the deformation of the normal section under the action; Fig. 4 is the schematic diagram of the deformation of the normal section under the action of the tensile force F; Schematic diagram of deformation; Figure 6 is a schematic diagram of the deformation of the normal rubber vibration isolation bearing under the pressure F of the front section.

The invention overcomes the problem that the ordinary rubber vibration isolation bearing is damaged or fractured after small tensile deformation, and by enhancing its own deformation ability, it avoids the addition of complex tensile devices, and solves the vibration isolation technology of irregular and complex structures. question. The invention can be widely used in the seismic isolation analysis and design of industrial and civil structures that have high requirements on the deformation performance of the seismic isolation layer.

Claims (2)

1. A tensile enhancement type rubber shock insulation support is characterized by comprising steel plate layers, rubber layers, vertical gaps, energy dissipation components and a sealing plate, wherein the tensile enhancement type rubber shock insulation support is of a plane symmetric structure, the energy dissipation components are arranged on the middle symmetric plane, the two sides of the symmetric plane are of a steel plate layer and rubber layer crossed laminated structure, the steel plate layers and the rubber layers are marked as horizontal planes, the symmetric plane is a vertical plane, and each layer of rubber layer is provided with a through gap parallel to the middle symmetric plane; sealing plates are respectively arranged at the upper end and the lower end of the tensile reinforced rubber shock insulation support; under the action of equal tension, the vertical deformation of the shock insulation support is large, n slits are arranged, the n-time deformation capacity is improved, the number of the slits can be set according to the deformation requirement, and n is a natural number of 1-3; each rubber layer is provided with a through seam with the middle symmetrical surfaces parallel to each other, and the rubber on the same layer is vertically disconnected; the steel deck is not broken.

2. A tensile reinforced rubber seismic isolation bearing as claimed in claim 1, wherein said energy dissipating member is a lead core or other low yield point metal material.

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