讨论了获得扭转地震加速度的原理,并通过编制Matlab程序获得了LIMON COSTA RICA地震波的绕z轴扭转加速度分量。对一个12层基础隔震结构进行ANSYS软件时程分析,对结构模型输入LI-MON COSTA RICA地震波扭转加速度分量以及平动加速度分量,进行时程分析,研究结果表明:地震动绕z轴扭转分量对隔震支座的影响很小,以后还需针对不同的结构类型和地震动做更多的研究。 The principle of obtaining the torsional seismic acceleration is discussed. The torsional acceleration component around the z axis of the LIMON COSTA RICA seismic wave is obtained by programming the Matlab program. Time-history analysis of torsional acceleration component and translational acceleration component of LI-MON COSTA RICA seismic wave for a 12-story base-isolated structure subjected to ANSYS software is carried out. The results show that the torsional component of ground motion around the z-axis The impact on isolation bearings is very small, and more research on different types of structures and earthquakes needs to be done later.