SSSI作用下结构的地震反应分析*
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(北京科技大学土木与环境工程学院，北京100083)[摘要] 为研究地震作用下相邻结构对周边结构振动衰减的影响，本文将上部结构简化为等效单自由度模型，采用明置于均质土层的刚性基础。对结构运动激发相邻结构运动的影响规律进行了分析研究。结果表明，两结构间相互作用随着结构之间的相对距离的增加而减弱；给出结构不受周边建筑影响的安全范围（相对距离为2.5）。并根据其影响范围，探讨相邻结构的对周边结构振动的影响，得出相邻结构物的存在减弱了原结构的地震响应。。[关键词] 结构-土-结构相互作用; 相对距离; 地震反应; 振动衰减中图分类号：TU311.3 文献标识码：A 文章编号：1002-848X(2013)S2-0411-03*国家自然科学基金资助项目(51078032)。作者简介：豆丽萍，硕士研究生，Email：doulipinglove@163.com.cn。Dynamic interaction of neighboring buildingDou Liping，Pan Danguang(Department of Civil Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China)Abstract: In order to realize the variation of structural dynamic characterics due to neighbor structures in buildings group, the surface structure is idealized as an equivalent single degree of freedom system with rigid base whose site consists of a single homogeneous layer. The dynamic characteristics of three-dimensional structure-soil-structure interaction system, including two identical structures, are investigated to identify the additional effects caused by the presence of a second structure. The results show that the interaction between two structures will be decreased when the relative distance increased. Therefore, the non-interacting distance is proposed. Also, this data will be used to consider the coupling effects of soil on the dynamic characteristics of structure-soil-structure systems that reduce seismic response of the structure.keywords: structure-soil-structure interaction; relative distance; earthquake response; vibration attenuation
