Three-dimensional isolation bearing with adjustable vertical early rigidity

Abstract

The invention discloses a three-dimensional isolation bearing with adjustable vertical early rigidity. The three-dimensional isolation bearing comprises a laminated rubber isolation bearing and a vertical isolation bearing which are sequentially connected in series vertically and is characterized in that a back pressure device is arranged inside a guiding sleeve of the vertical damping bearing, the back pressure device comprises two prepressing steel cables and two floating pressing plates, the two prepressing steel cables are distributed between a cylindrical rubber elastomer and the guiding sleeve, one end of one prepressing steel cable is fixed to the floating pressing plate adjacent to a driving plate, and the other end of one prepressing steel cable penetrates through the floating pressing plate adjacent to the base to be fixed to the base; one end of the other prepressing steel cable is fixed to the floating pressing plate adjacent to the base, and the other end of the other prepressing steel cable penetrates through the floating pressing plate adjacent to the driving pressing plate to be fixed to the driving pressing plate; each prepressing steel cable is provided with a slip-hook turnbuckle in series; the two prepressing steel cables are tensioned, so that the cylindrical rubber elastomer is clamped between the two floating pressing plates all the time.

Description

Technical field [0001] The invention relates to a building anti-vibration (or vibration) device, in particular to a three-dimensional vibration isolation device composed of a sandwich steel plate rubber pad and a vertical vibration isolation support in series. Background technique [0002] The seismic isolation device is a seismic isolation device located between the building and the foundation. Early seismic isolation devices were mainly two-dimensional seismic isolation bearings (laminated rubber seismic isolation bearings) composed of alternately laminated rubber and thin steel plates, which could only isolate the horizontal component of seismic waves. With the improvement of people's understanding of the multi-dimensional characteristics of earthquakes, three-dimensional seismic isolation devices have gradually attracted the attention of researchers in this field. The most common three-dimensional seismic isolation device is composed of laminated rubber seismic isolation bea...

AI Technical Summary

Problems solved by technology

Although the scheme described in this patent application can improve the tensile strength of the three-dimensional seismic isolation device to resist the huge tension generated by the swaying or even overturning of high-rise buildings in an earthquake, the following deficiencies still exist: 1. The spring isolation The support can only be compressed for energy consumption and shock absorption, but cannot be stretched for energy consumption and shock absorption; 2. The spring isolation support cannot preset the early stiffness, which is not convenient for presetting the seismic intensity to reduce the cost of isolation

However, this invention still has the following disadvantages: 1. The load connecting rod is balanced under the joint action of two groups of disc springs. Although the preload of the two groups of disc springs can be adjusted, no matter how they are adjusted, the The force of the disc spring on the load connecting rod is a set of equal and opposite forces. Just applying any external force on the load connecting rod will destroy this balance and deform the two sets of disc springs. Therefore, the 2. In this invention, two sets of disk springs must be used together to provide damping when the damper is under compression or tension load, which not only causes a certain waste, but also makes the damper greatly increased in length

It can be seen that although the stiffness of the spring in the patent application scheme can be changed, the effective working length of the spring is not only significantly shortened, but also can only be compressed for energy consumption and vibration reduction, and cannot be stretched for energy consumption and vibration reduction.

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