地震学报2013，Vol.35Issue(2)：262-271,10.DOI:10.3969/j.issn.0253-3782.2013.02.012
对含厚软表层海域工程场地设计地震动参数确定的一点建议
Suggestion on determination of design ground motion parameters for offshore engineering sites with deep soft surface layers
摘要
Abstract
Nowadays, equivalent linearization method is widely used, but the computed result always has great deviation while dealing with common offshore engineering sites with deep soft surface layers. In order to show the extent of the deviation, we choose a typical borehole and use equivalent linearization method to analyze the site responses under the excitation of minor, moderate and major ground motions. In this procedure, borehole models with or without soft surface layers are considered. As we known, soil has large variation range of nonlinear behaviour under severe earthquakes and equivalent linearization method can not fit well, so a direct time-domain integral method is introduced and compared with equivalent linearization method. Based on the above analysis, some solutions to the determination of design ground motion for offshore engineering sites with deep soft surface layers are proposed and discussed.关键词
厚软表层/设计地震动参数/等效线性化方法/直接时域积分方法Key words
deep soft surface layer/ design ground motion/ equivalent linearization method/ direct time-domain integral method分类
天文与地球科学引用本文复制引用
荣棉水,李小军,卢滔,黄雅虹,吕悦军..对含厚软表层海域工程场地设计地震动参数确定的一点建议[J].地震学报,2013,35(2):262-271,10.基金项目
中央公益性研究所基本科研业务专项基金(ZDJ2011-14,ZDJ2010-08)和国家重点基础研究发展计划(973项目)(2011CB013601)资助. （ZDJ2011-14,ZDJ2010-08）
