计算力学学报2012，Vol.29Issue(4)：582-588,7.
基于震源机制且考虑场地土分层差异效应的多点地震动：理论与程序开发
Multi-point seismic motions based on focal mechanism and considering local site multi-layer soil effect： theory and program implementation
摘要
Abstract
In this paper,a framework for generating multi-point earthquake motion of target filed in Chi- na, basing on focal mechanism and taking account of the spatial variability of soil properties, is given and proposed. The main contents include： （1） the transfer function of site including multiple soil layers is es- tablished based on random vibration theory, （2） based on the improved bedrock spectrum applicable to the target site in China, the variability among different site condition is reflected by establishing the transfer function of local site, （3） non-flat factor of site surface is considered on the basis of previous literature, （4） explicit expression phase-angle change by the filtration of multiple soil layers is also given for the convenience of the subsequent program code. Then, according to the theory framework, the visual program MEMS V2011.6 （Multi-support Earthquake Motions Simulation Version 2011.6） is developed and run successfully. The specific functions of the program involves the focal parameters assignment, inputting soil parameters, calculating and displaying transfer function of site soil with multi-layer,adjus- ting non-stationary parameters and frequency, generating multi-point earthquake motion histories, verif- ying the coherence of spatial seismic motions, fitting code-specified spectrum for bridge, building and electronic facility. In addition,based on a bridge example,the multi-point seismic motions of the target field are generated using the program MEMS V2011. 6, and the sensibility analysis of the generated ground motions to local site effect and epicentral involve theory and practicability ,and can provide distance is analyzed as well. The content in this paper directly reference for engineering.关键词
多点地震动/基岩谱/局部场地/非平稳/规范反应谱Key words
multi-point earthquake motion/beck-rock spectrum/local soil site/non-stationary/code-specified response spectrum分类
天文与地球科学引用本文复制引用
柳国环,陆新征,国巍..基于震源机制且考虑场地土分层差异效应的多点地震动：理论与程序开发[J].计算力学学报,2012,29(4):582-588,7.基金项目
国家自然科学重点基金 （）
国家自然科学基金 （）
中国博士后科学基金（2011M500332）资助项目. （）
