Three-dimensional seismic isolation support with vertical initial stiffness capable of being preset

Abstract

The invention relates to a three-dimensional seismic isolation support with vertical initial stiffness capable of being preset. The three-dimensional seismic isolation support comprises a vertical seismic isolation support and a laminated rubber seismic isolation support. The vertical seismic isolation support and the laminated rubber seismic isolation support are serially connected with each other. The three-dimensional seismic isolation support is characterized in that a back pressure device is further arranged in a guide sleeve of the vertical seismic isolation support and comprises more than three pre-stress steel wire ropes, steel wire rope turning components and a float back pressure steel plate, the quantity of the steel wire rope turning components is equal to that of the pre-stress steel wire ropes, the pre-stress steel wire ropes are in fold line states, one end of each pre-stress steel wire rope is symmetrically fixed onto the float back pressure steel plate around the axis of the guide sleeve, the other end of each pre-stress steel wire rope is wound through the opposite corresponding steel wire rope turning component and then is folded back, and then each pre-stress steel wire rope penetrates the float back pressure steel plate by a fixing point in the float back pressure steel plate and is fixed onto a base; the pre-stress steel wire ropes are tensioned until tensile force required for presetting the vertical initial stiffness is generated, so that a rubber air spring always can be clamped between a driving pressure plate and the float 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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