Friction pendulum support shock isolation layer tensile resistant limiting device

Abstract

The invention discloses a tensile resistant limiting device used for a friction pendulum support shock isolation layer. The tensile resistant limiting device for the friction pendulum support shock isolation layer comprises anchoring steel frames, pressure bearing plates, a sliding block and a spiral spring. The upper anchoring steel frame is embedded in a bottom beam of the shock isolation layer through pouring in advance, and the lower anchoring steel frame is anchored in an independent base column. The upper pressure bearing plate is welded to the lower anchoring steel frame, and a stiffening rib is welded for fixing. The lower pressure bearing plate is welded to the upper anchoring steel frame, and the stiffening rib is welded for fixing. A hole is reserved in the lower pressure plate to ensure that a lower end sleeve of the sliding block can be tightly inserted into the hole. An upper end plate of the sliding block is in contact with the upper pressure bearing plate, and the lower end sleeve penetrates through the spiral spring and the lower pressure bearing plate reserved hole. The inside of the lower bearing pressure plate reserved hole, the sliding block, and the lower bottom surface of the upper pressure bearing plate are all made of non-bonded low carbon steel, and thus smooth sliding is ensured. When the friction pendulum shock isolation structure is subjected to strong seismic oscillation action and the shock isolation layer and a base are about to be separated, the upper pressure plate and lower pressure bearing plate compress the spiral spring to produce pressure, so that the tensile resistant effect of the shock isolation layer is achieved through the effect that the upper anchor and lower anchor steel frame interact to prevent a friction pendulum from breaking away.

Description

technical field [0001] The invention relates to a tensile limit device for a vibration isolation layer of a friction pendulum bearing, which belongs to the field of vibration isolation of building structures. Background technique [0002] The basic isolation technology is a simple and effective means of resisting the action of earthquakes, and is known as one of the most important inventions in the field of earthquake engineering in the 20th century. The seismic response of the superstructure can be significantly reduced, and the seismic energy can be absorbed and consumed by arranging a seismic isolation layer with low horizontal stiffness and a certain energy dissipation capacity between the superstructure and the foundation. The seismic isolation bearing is the main component of the seismic isolation technology, which usually bears the gravity load of the upper structure and provides a certain horizontal stiffness and energy dissipation capacity. After 50 years of develo...

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Problems solved by technology

At the same time, under the strong earthquake near the fault zone, the friction pendulum also has the risk of excessive displacement, which needs special consideration in the design of seismic isolation structures

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