【摘要】 利用编制的场地地震反应并行计算程序PSAP,分别选取基岩长周期地震波和普通地震波作为输入,采用等效线性化方法,对某河谷场地进行了不同类型地震波作用下的三维有限元并行计算,分析了三维河谷场地的长周期地震反应特点,探讨了不同视波速情形下河谷场地的行波效应。结果表明,行波作用下局部场地产生明显的竖向地震反应,长周期地震波的水平向加速度反应放大系数明显大于普通地震波的结果,利用PC集群并行求解技术可以有效提高大型有限元分析的计算效率。更多还原

【Abstract】 Based on parallel simulating program PSAP,four long-period seismic waves and two common waves were selected in three dimensional long-period seismic responses equivalent-linear parallel analysis of a valley topography site under various seismic waves excitations,characteristics of long-period seismic response have been studied and traveling wave effect of valley topography site under different apparent wave velocity excitation has been discussed.The results show that traveling wave excitation will lead to significant vertical seismic responses in local site,the horizontal acceleration responses under long-period seismic waves excitation are greater than common waves excitation obviously,and the PC cluster parallel computation is also performed to raise the computational efficiency in solving the mass computing problem.更多还原