Three-dimensional base isolation support with preset vertical initial rigidity

Abstract

The invention relates to a three-dimensional base isolation support with preset vertical initial rigidity. The three-dimensional base isolation support comprises a vertical base isolation support and a laminate rubber base isolation support mutually connected in series and is characterized in that a back pressure device is also arranged in a guide sleeve of the vertical base isolation support, wherein the back pressure device comprises more than three prepressing steel wire ropes, steel wire rope turning elements of the same number as the prepressing steel wire ropes and a floating back pressure steel plate; the prepressing steel wire ropes are in a fold line state; one end of each prepressing steel wire rope is symmetrically fixed on the floating back pressure steel plate around the axis of the guide sleeve, and the other end bypasses the opposite steel wire rope turning element and turns back and then passes through the floating back pressure steel plate through the fixing point of the prepressing steel wire rope on the floating back pressure steel plate to be fixed on a base; and the prepressing steel wire rope is tensioned to the tension required for the preset vertical initial rigidity so that a cylindrical rubber elastomer is always clamped between a drive pressure plate and the floating back pressure steel plate.

Description

technical field [0001] The invention relates to a building anti-vibration (or shock) device, in particular to a three-dimensional shock-isolation device in which a sandwich steel plate rubber pad is connected in series with a vertical shock-isolation support. Background technique [0002] The seismic isolation device is an anti-seismic isolation device installed between the building and the foundation. The early seismic isolation devices were mainly two-dimensional isolation bearings (laminated rubber isolation bearings) composed of rubber and thin steel plates alternately laminated, 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 isolation device is composed of laminated rubber isolation bearings connected ...

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 dissipation and shock absorption, but cannot be stretched for energy dissipation and shock absorption; 2. The spring isolation support cannot preset the initial stiffness, which is inconvenient to preset the seismic intensity and 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 disc 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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