隔震层恢复力模型及残余变形问题研究  

Research of restoring force model and residual deformation on isolation layer

作　　者：卜龙瑰[1] 苗启松[1] Bu Longgui;Miao Qisong(Beijing Institute of Architectural Design,Beijing 100045,China)

机构地区：[1]北京市建筑设计研究院有限公司,北京100045

出　　处：《建筑结构》2018年第S2期436-440,共5页Building Structure

摘　　要：采用天然橡胶类隔震支座的组合隔震结构,通常采用无铅芯橡胶支座、铅芯橡胶支座及弹性滑板支座作为隔震层主要隔震装置。由于铅芯橡胶支座及弹性滑板支座均不具有完全变形恢复能力,因此,采用该类组合隔震的隔震层总恢复力骨架曲线必定存在静态不可恢复的残余变形,该变形的大小反映了隔震层整体变形恢复能力的强弱,体现了结构在服役期承受多次地震的能力。通过对几种常用的组合方案的隔震层恢复力模型推导分析,并对残余变形值的变化规律进行研究,给出针对不同组合情况下不具有完全变形恢复能力支座的可接受比例。最后结合工程算例,按照前述推导方法对隔震层恢复能力进行验算,并提出隔震支座调整方案,供同类工程设计参考和借鉴。Using natural rubber isolation bearing the combined isolation structure,usually adopt lead core rubber bearings,lead rubber bearings and elastic slide bearing as isolation layer of main isolation device. Due to the lead rubber bearings and elastic slide bearings are not a complete displacement restoring capacity,and therefore,adopting the combined isolation layer must total restoring force skeleton curves exist static irreversible residual deformation,the deformation reflects the size of the isolation layer of the strength of the overall displacement restoring capacity,embodies the structure in the given the ability to withstand multiple earthquake. Based on the combination of several common solution analysis derived from the restoring force model of isolation layer,and to study the change rule of residual deformation value,given in view of the different combination is not a complete displacement restoring capacity bearing acceptable proportion. Finally,combining with the engineering example,the recovery ability of the isolation layer was checked according to the foregoing method,and the adjustment plan of isolation support was put forward,reference and reference for similar engineering design.

关 键 词：组合隔震 恢复力模型 弹性滑板支座 最大残余变形 

分 类 号：TU352.12[建筑科学—结构工程]