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工程力学  2015 

基于地震动模拟的一致危险谱和条件均值谱生成及应用

DOI: 10.6052/j.issn.1000-4750.2014.05.S016, PP. 196-201

Keywords: 点源模型,混合震源模型,一致危险谱,条件均值谱,地震动模拟

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Abstract:

提出了一种基于地震动模拟的一致危险谱和条件均值谱的生成方法。该方法采用AB95_BC点源模型和基于有限断层的混合震源模型来生成人工模拟地震动,进一步对模拟地震动的反应谱进行统计分析,生成研究地区的一致危险谱及条件均值谱。为说明该文方法,选择缺乏历史地震资料的美国MemphisTN地区作为研究区域,模拟了该地区未来1000年可能发生的地震,并生成该地区50年超越概率为2%一致危险谱及相应的条件均值谱。最后考虑不同调幅方法、匹配均值和标准差等因素的影响,结合贪心优化算法,利用条件均值谱挑选地震动记录。

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