A kind of seismic isolation support for LNG storage tank and its installation method

Abstract

The invention provides an isolation bearing for an LNG storage tank and an installation method. The isolation bearing comprises an upper seat plate assembly, a lower seat plate assembly and a bearingbody, the lower seat plate assembly comprises a lower connecting plate, a bottom plate, a sliding assembly and a sliding limiting piece, the lower connecting plate is connected with the bearing body,the bottom plate is connected with a lower concrete layer, and the sliding assembly and the sliding limiting piece are arranged between the lower connecting plate and the bottom plate. The installation method includes the steps that a reserved hole is pre-formed in the lower concrete layer, the bottom plate is pre-buried in the reserved hole, after the lower concrete layer is solidified, the sliding assembly, the upper seat plate assembly, the bearing body and the lower connecting plate are placed above the bottom plate, and the sliding limiting piece is tightened; and the upper concrete layerpouring construction is conducted, after the completion of pouring, the sliding limiting piece is screwed out, after the upper concrete layer is solidified to the design strength, the reserved hole is poured until a pre-embedded structure of the lower connecting plate is buried in the concrete layer. The isolation bearing has the advantages of being high in isolation effect, long in anti-fatigueservice life of the bearing, convenient to operate and the like.

Description

technical field [0001] The invention relates to the field of shock-isolation supports, in particular to a shock-isolation support for LNG storage tanks and an installation method. Background technique [0002] In recent years, more and more attention has been paid to the seismic isolation and anti-seismic properties of buildings. As a traditional seismic isolation product in the field of building seismic isolation, seismic isolation bearings have good seismic isolation effects and self-resetting functions. For conventional small buildings, due to the small area of ​​the superstructure of small buildings, the existing seismic isolation bearings have little deformation caused by shrinkage after concrete pouring, and usually do not have large additional shear deformation, and the impact on the product itself can be ignored. [0003] However, for LNG storage tanks (liquefied natural gas storage tanks), the upper structure of the LNG storage tank isolation layer is a large integr...

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Problems solved by technology

[0003] However, for LNG storage tanks (liquefied natural gas storage tanks), the upper structure of the LNG storage tank isolation layer is a large integral flat plate structure. After the superstructure is poured, large shrinkage deformation will occur during the concrete solidification process. Under normal circumstances, the shrinkage deformation will Converting to the shear deformation of the support is equivalent to adding a large initial deformation to the isolation support (especially the lead core and high damping isolation support). Under different shear strain conditions, the isolation support There is a large difference in the horizontal performance of the seat, which has a great influence on the isolation effect of the seismic isolation support, and the fatigue life of the support is short

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