- 摘 要
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（北京建筑工程學院， 北京100044）
[摘要] 近斷層脈沖型地震動的大幅值、長周期速度與位移脈沖會使基礎(chǔ)隔震結(jié)構(gòu)的隔震層產(chǎn)生過大變形，導致隔震支座側(cè)向失穩(wěn)，隔震結(jié)構(gòu)體系破壞。提出隔震層組合限位器軟限位保護方案。設計實驗模型，輸入近斷層脈沖型地震動，應用軟件SAP2000對36種軟限位工況進行分析，結(jié)果表明限位效果良好。給出了組合限位器參數(shù)對隔震層與上部結(jié)構(gòu)動力響應的影響規(guī)律。
[關(guān)鍵詞] 近斷層地震; 基礎(chǔ)隔震; 組合限位器; 軟碰撞
中圖分類號 P315 文獻標識碼 A 文章編號：1002-848X(2013)S1-1237-05
*北京市教育委員會科技計劃重點項目、北京市自然基金重點項目（KZ201110016020）。
作者簡介：韓淼，博士，教授，Email: hanmiao@bucea.edu.cn。
Analysis of combination limiting deformation to base isolation layer under near-field ground motion
Han Miao, Guo Fengming, Jiang Yue
(School of Civil Engineering & Traffic Engineering, Beijing University of Civil Engineering & Architecture, Beijing 100044, China)
Abstract: The near-field pulse-type ground motion will bring about large deformation of base isolation layer. The isolation bearings will buckle instability and the isolation system will be destroyed. Method of soft collision limiting deformation is proposed. The combination limiting devices are installed in isolation layer. The test model is designed. The dynamic responses of the model under near-field ground motion are calculated by means of software for calculation SAP 2000. The results of 36 kinds of conditions are analyzed. The limiting deformation effect of combination limiting devices is favorable. The rules between dynamic response of isolation layer and super-structure and different parameters of combination limiting devices are put forward.
Keywords: near-field ground motion; base isolation; combination limiting devices; soft collision
