基础磨擦滑移隔震结构分析
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摘要
基础隔震技术是在建筑结构基底设置隔震层,来控制地震波能量向上部结构
    传播,以达到减小结构地震反应的目的。在各类减震措施中,基础隔震技术以其
    行之有效、简单方便、经济实用等优势,得到了工程界的认可与欢迎,为了使隔
    震技术广泛应用于我国,有必要对其进行深入的理论分析与研究。本文针对基础
    摩擦滑移这一隔震形式进行讨论,建立了隔震体系的层间剪切模型,并利用
    Newmark法编制了基础摩擦滑移隔震结构地震反应分析程序。利用该程序,对
    中低层和高层隔震建筑地震反应进行了分析,并比较固定基础建筑和基底隔震建
    筑在地震荷载作用下的反应特性,分析其隔震效果。结果表明:基础摩擦滑移隔
    震技术具有明显的减震效果,它大大降低了地震作用下结构的峰值反应,有效地
    消耗了地震能量。此外,本文还对隔震层隔震参数(刚度、摩擦系数、阻尼)的
    改变对隔震结构隔震效果的影响进行了分析,为隔震参数的选取提出了一些参考
    性建议。
The technology of base isolation by constructing isolation layer at
     building base is used to isolate seismic energy so that it can抰 spread upward
     therefore , seismic response of structure is cut down . In all kinds of seismic isolation
     measures , base isolation technology is accepted and popular in the field of
     engineering , because of the feature simplify , facility , effective and economy . For
     base isolation technology is used widely in China, it is necessary to analyze and study
     the theory deeply. In this paper, base sliding isolation technology is discussed mainly,
     and according to interbedded shear model seismic response analysis program of
     structure with base sliding isolation is compiled by using Newmark抯 method . With
     this program , seismic response of middle and high isolated structures is analyzed and
     compared with that of fixed base structures . Analysis results indicate that base
     isolation technology has obviously seismic isolating effect, and decreases maximum
     response of structure sharply when earthquake occurs , and isolates seismic energy
     effectively . Moreover , the author analyzes how change of isolating parameters
     (stiffness , friction coefficient , damping) influences the isolating effect of isolated
     structure , and presents some referential suggestion about selecting isolating
     parameters.
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