地震危险性分析估计场地地震动持续时间
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摘要
基于地震危险性概率分析法,采用能量持时定义和经验预测方程,以某城市商务区为例,计算了不同设防水准下场地的地震动持续时间.计算结果表明,随着设防水准降低,地震动持续时间增大,预测的持续时间与场地设防水准相对应,具有工程应用价值.
Based on probabilistic seismic hazard analysis,a method for predicting ground motion duration is proposed.Taking the ground motion durations of a city business district for example,the durations in different earthquake resistance standards are calculated by useing the definition of significant duration and empirical prediction equations.The results show that the ground motion duration increases with reduce of the earthquake resistance standard.The duration predicted is compatible with earthquake resistance standard;so that can be applied to engineering.
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