近场地震动估计中高、低频地震动的叠加  

Superposition of ground motions of low and high frequencies in near-field ground motion prediction

作　　者：孙晓丹 陶夏新[1,2] 刘陶钧[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《自然灾害学报》2011年第4期84-89,共6页Journal of Natural Disasters

基　　金：国家自然科学基金项目(50778058和90715038);国家科技支撑计划课题(2006BAC13B02)

摘　　要：研究了近场地震动场估计中高、低频地震动叠加过程中的4个问题,分别是高频地震动位移和速度时程的计算方法、滤波与微分或积分的顺序、叠加与微分或积分的顺序以及传递函数与叠加的顺序问题。最后,基于这4个问题的分析研究,提出了一个适合大型工程场地地震动估计的高、低频合成方案,该方案能在确保结算结果精度的同时最大程度地节省工作量。Four issues in the superposition of ground motions of low and high frequencies in near - field ground motion prediction were studied： （ 1 ） the method to calculate the displacement and velocity time histories in high frequencies; （2）the sequence of filtering, integration or differentiation ; （3）the sequence of supeqoosition, integration or differentiation; （4）the sequence of superposition and muhiplying transfer function. Finally, a detailed scheme of superposition for the ground motion prediction of a large-scale engineering project was proposed based on the analysis of the four issues, which could save the computing time as well as ensure the precision of resuh.

关 键 词：地震动叠加 滤波 微分 积分 

分 类 号：TU311.3[建筑科学—结构工程]