A trigger-type limited negative stiffness high-strength spring shock-absorbing support

Abstract

The invention provides a trigger-type limited negative stiffness high-strength spring damping support. The trigger-type limited negative stiffness high-strength spring damping support includes: an upper connecting steel plate, a support upper structure, a support column, a spring combination, and a rubber support Layer and lower connecting steel plate; there is a support superstructure on the top of the upper connecting steel plate, several supporting columns are vertically hinged on the upper connecting steel plate and the lower connecting steel plate, and a rubber bearing layer is installed between the upper connecting steel plate and the lower connecting steel plate, and the spring The combination is vertically anchored to the upper connecting steel plate and the lower connecting steel plate, and hinged to the upper connecting steel plate and the lower connecting steel plate to form a “K”-shaped composite member. The invention has the beneficial effects of providing sufficient bearing capacity when the earthquake magnitude is low, triggering the negative stiffness performance when the earthquake magnitude is large, and combining the negative stiffness and ordinary positive stiffness isolation bearings in parallel, the total hysteresis curve is relatively full, making the isolation The seismic layer has a large damping ratio, effectively reduces the displacement response of structural vibration, and obtains a relatively ideal seismic isolation effect.

Description

technical field [0001] The invention relates to the technical fields of civil engineering and earthquake engineering, in particular to a trigger-type limited negative stiffness high-strength spring damping support. Background technique [0002] my country is located between the two major earthquake zones and is a country prone to earthquakes. In recent years, our country has experienced the Wenchuan earthquake and the Ya'an earthquake, which have caused great harm to our people. On the basis of summarizing the experience and lessons of earthquake damage, the concept of seismic design of structures has penetrated into the design thinking of structural engineers. In the seismic design of structures, the passive damping control technology has been developed maturely, and the base isolation method has been widely used. This design concept mainly relies on the application of a flexible isolation layer with sufficient reliability between the foundation and the superstructure to p...

AI Technical Summary

Problems solved by technology

However, the effective isolation of structures with longer natural vibration periods cannot be achieved. The main reason is that there is no isolation layer with low horizontal stiffness, and at the same time, large displacements that damage the structure itself will occur after a large earthquake

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