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   孫  歡，  韓  淼，  段燕玲
   （北京建筑工程學(xué)院土木與交通工程學(xué)院，北京 100044）

[摘要] 近斷層地震作用于基礎(chǔ)隔震結(jié)構(gòu)時(shí)，會(huì)使隔震層產(chǎn)生很大的位移，故提出對(duì)隔震結(jié)構(gòu)隔震層進(jìn)行軟碰撞限位保護(hù)以及軟碰撞限位器的剛度估算方法。采用SAP2000軟件對(duì)近斷層地震作用下軟碰撞限位隔震結(jié)構(gòu)模型進(jìn)行計(jì)算，分析了軟碰撞限位器參數(shù)對(duì)隔震結(jié)構(gòu)近斷層地震響應(yīng)的影響規(guī)律。
[關(guān)鍵詞] 近斷層地震；基礎(chǔ)隔震；軟碰撞
中圖分類號(hào)：TU352.1    文獻(xiàn)標(biāo)識(shí)碼：A    文章編號(hào)：1002-848X(2012) Sl-0538-04

Analysis on spring soft-collision limiting displacement of isolating structure in near-fault ground motions
Sun Huan, Han Miao, Duan Yanling
( School of Civil Engineering ＆Traffic Engineering, Beijing University of Civil Engineering & Arclutecture, Beijing 100044, China)

Abstract: Base-isolated structures will have an excessive displacement during near-fault ground motions. The way to limit displacement of the base isolating layer using soft-collision was proposed.  The method to estimate the stiffness of soft-collision buffer was put forward. The model of soft-collision limiting displacement of isolating structure was analyzed using SAP2000, the influences of soft-collision buffer's parameters on isolating structural response was clarified.
Keywords: near-fault ground motions; base isolating; soft-collision