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断层倾角对上/下盘效应的影响

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Keywords: 近断层地震动,断层倾角,上/下盘效应,有限元法

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Abstract:

上/下盘效应是近断层地震动的显著特征之一。上/下盘效应的影响因素很多,由于靠近断层,与震源相关的因素成为主导因素,尤其是断层倾角的影响最为明显。本文采用二维有限元数值模拟的方法模拟了近断层地震动,定量地考查了断层倾角对上/下盘效应的影响。结果表明无论是走滑型断层还是倾滑型断层,随着断层倾角从0°~90°的增大过程中,上/下盘效应先迅速增大然后缓慢减小。

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