基于谱加速度的地震动强度指标比较研究
摘要
结构地震反应分析的精确程度对所选用的地震动强度指标IM有很强的依赖性,描述IM的数量较多,其中结构基本周期对应的谱加速度Sa(T1)应用最为广泛。但由于Sa(T1)无法考虑结构的高阶模态效应以及非线性变形引起的体系周期延长效应,导致给定IM下工程需求参数条件分布的变异性很大。为此,学者提出了多种平均谱加速度加以改善。文中提出利用地震波的傅立叶谱对谱加速度进行加权平均作为新的IM,然后根据基于现行规范设计的4层和8层混凝土框架在125条地震动作用下的非线性动力时程分析结果,比较了四种IM的效果。结果表明,考虑高阶频率及周期延长影响后的IM可以改善只考虑基本周期的Sa(T1)的不足,同时给出了推荐的IM。
引文
[1]Shome N.Probabilistic seismic demand analysis of nonlinear structures[D].United States-California:Stanford University,1999.
[2]Bianchini M,Diotallevi P,Baker J.Prediction of inelastic structural response using an average of spectral accelerations[C].10th International Conference on Structural Safety and Reliability,Osaka,Japan,2009.
[3]Baker J W,Allin Cornell C.A vector-valued ground motion intensity measure consisting of spectral acceleration and epsilon[J].Earthquake Engineering\& Structural Dynamics.2005,34(10):1193-1217.
[4]Baker J W,Cornell C A.Choice of a vector of ground motion intensity[C].13th World Conference on Earthquake Engineering,Vancouver,B.C.,Canada,2004.
[5]Cordova P P,Deierlein G G,Mehanny S S F,et al.Development of a two-parameter seismic intensity measure and probabilistic assessment procedure[C].2000.
[6]CEN,European Committee for Standardization.Eurocode8:design provisions for earthquake resistance of structures,Part1.1:general rules,seismic actions and rules for buildings[S].prEN1998-1.
[7]樊剑,吕超,张辉.地震波的时频特征及其对结构地震反应的影响[C].第17届全国结构工程学术会议论文集(第Ⅲ册),中国湖北武汉,2008,14-18.
[8]Elnashai A,Papanikolaou V,Lee D H.ZeusNL user manual[M].Civil and Environmental Engineering Department,University of Illinois at Urbana Champaign,2002.
[2]Bianchini M,Diotallevi P,Baker J.Prediction of inelastic structural response using an average of spectral accelerations[C].10th International Conference on Structural Safety and Reliability,Osaka,Japan,2009.
[3]Baker J W,Allin Cornell C.A vector-valued ground motion intensity measure consisting of spectral acceleration and epsilon[J].Earthquake Engineering\& Structural Dynamics.2005,34(10):1193-1217.
[4]Baker J W,Cornell C A.Choice of a vector of ground motion intensity[C].13th World Conference on Earthquake Engineering,Vancouver,B.C.,Canada,2004.
[5]Cordova P P,Deierlein G G,Mehanny S S F,et al.Development of a two-parameter seismic intensity measure and probabilistic assessment procedure[C].2000.
[6]CEN,European Committee for Standardization.Eurocode8:design provisions for earthquake resistance of structures,Part1.1:general rules,seismic actions and rules for buildings[S].prEN1998-1.
[7]樊剑,吕超,张辉.地震波的时频特征及其对结构地震反应的影响[C].第17届全国结构工程学术会议论文集(第Ⅲ册),中国湖北武汉,2008,14-18.
[8]Elnashai A,Papanikolaou V,Lee D H.ZeusNL user manual[M].Civil and Environmental Engineering Department,University of Illinois at Urbana Champaign,2002.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心