Seismic mitigation and isolation support capable of resisting vertical seismic oscillation

Abstract

The invention discloses a seismic mitigation and isolation support capable of resisting vertical seismic oscillation. The support comprises a lower bearing steel member, an upper bearing steel member, a vertical damping unit and a horizontal damping unit, wherein the bottom of a bottom plate of the lower bearing steel member is provided with a structure mounting site; the top of a top plate of the upper bearing steel member is provided with a structure mounting site, the bottom of the top plate of the upper bearing steel member is in sliding sealing connection with the top of a top plate of the lower bearing steel member, and the bottom of a bottom plate of the upper bearing steel member is in sliding connection with the top of the bottom plate of the lower bearing steel member; the bottom of the vertical damping unit is fixedly mounted at the top of the bottom plate of the upper bearing steel member, and a gap is formed between the top of the vertical damping unit and the bottom of the top plate of the lower bearing steel member; and the bottom of the horizontal damping unit is fixedly installed at the bottom of the bottom plate of the lower bearing steel member, the top of the horizontal damping unit does not make contact with the bottom of the top plate of the lower bearing steel member, and a gap is formed between the horizontal damping unit and the bottom plate of the lower bearing steel member. The vertical displacement of the structure can be limited, and the vertical seismic oscillation resistance of the support is improved.

Description

technical field [0001] The invention relates to the technical field of disaster prevention and shock absorption of engineering structures. More specifically, the present invention relates to a shock-absorbing and isolating support for resisting vertical ground vibrations. Background technique [0002] As a safe and economical seismic isolation control device, seismic isolation bearings are widely used in the seismic design of engineering structures such as bridges and buildings at home and abroad. The stiffness of the shock-absorbing and isolating bearing is small, which can reduce the basic vibration frequency of the structure and prolong the basic vibration period of the structure, thereby avoiding the main energy frequency band of the ground motion, reducing the seismic energy input into the structure, and limiting the seismic response of the structure. [0003] For near-fault ground motion, in addition to the horizontal ground motion component, the vertical ground motio...

AI Technical Summary

Problems solved by technology

Significant vertical ground motion will cause the support to be pulled, causing the deterioration or loss of the shock absorption and isolation function of the support, and then causing serious earthquake damage such as falling beams or overturning of the structure.

[0004] At present, most of the shock-absorbing and isolating bearings commonly used in engineering do not consider the resistance capacity of vertical earthquake motion.

However, in existing shock-absorbing and isolating bearings that consider vertical earthquakes, the fitting force between the metal interfaces is often used to achieve the pull-out effect, but the requirements for the bearing capacity of the anchorage system and the interface fitting system are extremely high. For such a huge natural disaster, it is generally difficult to meet the requirements of anti-drawing under the action of vertical earthquakes.

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