多级力控制随机Pushover方法
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摘要
提出"次中震"的概念,将"小震、次中震、中震、大震"四级地震水准与"轻微破坏、中等破坏、严重破坏、倒塌"四级整体极限状态相对应,提出多级力控制Pushover方法。考虑结构的随机性,将蒙特卡洛模拟法与多级力控制Pushover方法相结合,提出多级力控制随机Pushover方法。将该法应用于钢筋混凝土框架结构,得到结构整体抗震能力易损性曲线。
A new concept of "sub-moderate earthquake" is proposed,and then a multi-level force controlled pushover method is put forward,which builds up the corresponding relationships between four levels of seismic fortification (namely,minor,sub-moderate,moderate and major earthquakes) and four levels of global limit states of structures(namely,minor damage,moderate damage,severe damage and collapse).To consider the randomness in structures,a multi-level force controlled random pushover method is put forward,which combines Monte Carlo Simulation method with multi-level force controlled pushover approach.The proposed method is applied to a R.C.frame structure,for which the fragility curves of the global seismic capacity of the structure are obtained.
A new concept of "sub-moderate earthquake" is proposed,and then a multi-level force controlled pushover method is put forward,which builds up the corresponding relationships between four levels of seismic fortification (namely,minor,sub-moderate,moderate and major earthquakes) and four levels of global limit states of structures(namely,minor damage,moderate damage,severe damage and collapse).To consider the randomness in structures,a multi-level force controlled random pushover method is put forward,which combines Monte Carlo Simulation method with multi-level force controlled pushover approach.The proposed method is applied to a R.C.frame structure,for which the fragility curves of the global seismic capacity of the structure are obtained.
引文
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[9]吕大刚,于晓辉,王光远.基于改进点估计法的结构整体概率抗震能力分析[J].世界地震工程,2008,24(4):7―13.Lu Dagang,Yu Xiaohui,Wang Guangyuan.Global probabilistic seismic capacity analysis of structures based on improved point estimation method[J].World Earthquake Engineering,2008,24(4):7―13.(in Chinese)
[10]McKenna F,Fenves G L,Scott M H.Open system for earthquake engineering simulation[R].Pacific Earthquake Engineering Research Center,University of California at Berkeley,2008.
[2]Gardoni P,Der Kiureghian A,Mosalam K M.Probabilistic capacity models and fragility estimates for reinforced concrete columns based on experimental observations[J].Journal of Engineering Mechanics,ASCE,2002,128(10):1024―1038.
[3]Porter K,Hamburger R,Kennedy R.Practical development and application of fragility function[C].Proc.of SEI Structures Congress,Long Beach CA,America,2007.
[4]尹华伟,汪梦甫,周锡元.结构静力弹塑性分析方法的研究和改进[J].工程力学,2003,20(4):45―49.Yin Huawei,Wang Mengfu,Zhou Xiyuan.Studies and improvement on structural static Pushover analysis method[J].Engineering Mechanics,2003,20(4):45―49.(in Chinese)
[5]方德平,王全凤.基于改进能力谱法的砼框架Pushover分析[J].工程力学,2008,25(1):150―154.Fang Deping,Wang Quanfeng.Pushover analysis of concrete frame based on improved capacity spectrum method[J].Engineering Mechanics,2008,25(1):150―154.(in Chinese)
[6]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.GB50011-2001,Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2001.(in Chinese)
[7]吕大刚,于晓辉,王光远.基于MVFOSM有限元可靠度方法的结构整体概率抗震能力分析[J].世界地震工程,2008,24(2):1―8.Lu Dagang,Yu Xiaohui,Wang Guangyuan.Global probabilistic seismic capacity analysis of structures based on MVFOSM finite element reliability method[J].World Earthquake Engineering,2008,24(2):1―8.(in Chinese)
[8]吕大刚,于晓辉,王光远.基于Zhou-Nowak数值积分法的结构整体概率抗震能力分析[J].世界地震工程,2008,24(3):7―13.Lu Dagang,Yu Xiaohui,Wang Guangyuan.Global probabilistic seismic capacity analysis of structures based on Zhou-Nowak numerical integration method[J].World Earthquake Engineering,2008,24(3):7―13.(in Chinese)
[9]吕大刚,于晓辉,王光远.基于改进点估计法的结构整体概率抗震能力分析[J].世界地震工程,2008,24(4):7―13.Lu Dagang,Yu Xiaohui,Wang Guangyuan.Global probabilistic seismic capacity analysis of structures based on improved point estimation method[J].World Earthquake Engineering,2008,24(4):7―13.(in Chinese)
[10]McKenna F,Fenves G L,Scott M H.Open system for earthquake engineering simulation[R].Pacific Earthquake Engineering Research Center,University of California at Berkeley,2008.
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