Construction method of limiting and self-resetting rubber-sliding seismic isolation bearing

Abstract

A construction method of a limiting and self-resetting rubber-sliding seismic isolation bearing comprises the steps that (1) a steel plate is embedded in the position, where a seismic isolation cushion needs to be put, of a seismic isolation layer foundation; (2) a rubber bearing is connected to the embedded steel plate through bolts; (3) reinforced concrete check blocks are formed through pouring at the portion of the seismic isolation layer foundation according to the horizontal displacement of a seismic isolation structure under the earthquake function; (4) teflon sliding materials are pasted to the top of the rubber bearing and the lower portion of the seismic isolation structure to form sliding layers, and the sliding layers adopt a coulomb friction force model; and (5) in order to reduce horizontal displacement of the structure, shape memory alloy helical springs in a large size are arranged between the check blocks and the structure and connected to concrete through embedded parts. The shape memory alloy helical springs not only have the limiting function, but also can achieve the self-resetting function after an earthquake is over due to the shape memory effect of the material, thereby greatly reducing residual displacement of the structure and ensuring post-quake normal use of the structure.

Description

technical field [0001] The invention relates to the construction technology of building shock-isolation bearings. Background technique [0002] Among structural disaster control methods, laminated rubber and slip isolation are widely studied and used. There are many application examples of laminated rubber seismic isolation engineering, and the design specifications are relatively comprehensive; friction-slip isolation has simple structure, convenient fabrication, low cost and simple construction. The common point of the two methods is that the superstructure and the foundation are separated by the isolation layer, the horizontal displacement under the earthquake mainly occurs in the isolation layer, and the upper structure can approximate the rigid body translation; at the same time, the isolation layer can prolong the structural period, so that The period of the isolation structure is far away from the excellent period of the site; the isolation layer can not only isolate...

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Problems solved by technology

[0003] (1) When the horizontal shear deformation of the rubber bearing is large, it is easy to cause instability, and its tensile capacity is insufficient, and it is prone to tensile damage when the earthquake is large;

[0004] (2) The shock absorption effect of slip isolation is better when the friction coefficient is small, and at the same time, it will cause excessive horizontal displacement of the isolation layer, which will affect the normal use and even cause collision between the structure and the surrounding facilities, and it does not have self-sufficiency. Reset mechanism, the residual displacement after the earthquake is too large, affecting normal use;

[0005] (3) The limit device may have insufficient deformation capacity, which restricts the movement of the sliding isolation structure and weakens the shock absorption effect

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