不同地震波作用下,可液化场地中上部结构动力响应明显不同.本文基于离心机振动台试验,利用开元软件OpenSees建立有效应力有限元数值模型,对比试验和数值模拟结果,选用16条地震波研究不同地震波作用下上部结构动力响应规律.结果表明:上部结构竖向位移随着地震能量的增大而增大;上部结构侧向位移峰值和地震波速度或者位移峰值出现时间具有一致性;上部结构竖向位移与地震波Arias强度和特征强度之间存在较强的相关性.
Under different seismic waves,the dynamic response of the upper structure in liquefiable sites was significantly different.This article was based on the centrifuge vibration table test,using the open-source software OpenSees to establish an effective stress finite element numerical model.The experimental and numerical simulation results were compared,and 16 seismic waves were selected to study the dynamic response law of the upper structure under different seismic waves.The results show that the vertical displacement of the upper structure increases with the increase of seismic energy.The peak lateral displacement of the upper structure is consistent with the occurrence time of seismic wave velocity or displacement peak.There is a strong correlation between the vertical displacement of the upper structure and the seismic wave Arias strength and characteristic strength.