土层地震反应分析中侧向人工边界的影响

英文篇名：Effect of Vertical Artificial Boundary on Seismic Response of Soil Layer
中文刊名：同济大学学报(自然科学版)
英文刊名：Journal of Tongji University
作者：楼梦麟 ; 潘旦光 ; 范立础
英文作者：LOU Meng-lin ; PAN Dan-guang ; FAN Li-chu (State Key Laboratory for Disaster Reduction in Civil Engineering ; Tongji University ; Shanghai 200092 ; China)
中文关键词：土层反应 ; 外源激振 ; 边界条件
英文关键词：soil response ; outside excitations ; artificial houndary
出版日期：2003-07-30
机构：同济大学土木工程防灾国家重点实验室,同济大学土木工程防灾国家重点实验室,同济大学土木工程防灾国家重点实验室上海200092 ,上海200092 ,上海200092
年：2003
期：07
出版单位：同济大学学报(自然科学版)

摘要

用有限元法分析了在水平地震波激振作用下弹性、均匀土层中有限土域的取值范围对计算精度的影响 .主要探讨了在简谐荷载作用下 ,土层反应随侧向边界条件、迫振频率、阻尼和土层长深比 (l/h)的变化规律 .在此基础上 ,计算地震波作用下土层反应随l/h和阻尼的变化情况 ,为在应用有限元法进行土层地震反应计算时 ,确定有限土域范围提供依据 .并将这一结果应用于土 -结构体系的直接有限元法的分析中 ,计算河谷上的拱结构的地震反应情况 ,计算结果表明了数值计算的有效性
Under horizontal earthquake excitations,the precision of results with the scope of soil region was analyzed.The soil response to harmonic excitation with artificial boundary,damp coefficient,exciting frequency and the ratio of width and depth (l/h) was discussed.At the same time,the soil layer response under seismic excitations with l/h and damp coefficient was evaluated.It will be the foundation for how to consider the scope of soil layer,seismic response of which was calculated by direct finite element method.Based on the above conclusion,the response of a river-crossing arc under seismic excitations was analyzed.The results showed that the scope of soil layer is satisfied for soil-structure interaction analysis.

引文

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