SSSI作用下結(jié)構(gòu)的地震反應(yīng)分析*
豆麗萍，潘旦光
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(北京科技大學土木與環(huán)境工程學院，北京100083)[摘要] 為研究地震作用下相鄰結(jié)構(gòu)對周邊結(jié)構(gòu)振動衰減的影響，本文將上部結(jié)構(gòu)簡化為等效單自由度模型，采用明置于均質(zhì)土層的剛性基礎(chǔ)。對結(jié)構(gòu)運動激發(fā)相鄰結(jié)構(gòu)運動的影響規(guī)律進行了分析研究。結(jié)果表明，兩結(jié)構(gòu)間相互作用隨著結(jié)構(gòu)之間的相對距離的增加而減弱；給出結(jié)構(gòu)不受周邊建筑影響的安全范圍（相對距離為2.5）。并根據(jù)其影響范圍，探討相鄰結(jié)構(gòu)的對周邊結(jié)構(gòu)振動的影響，得出相鄰結(jié)構(gòu)物的存在減弱了原結(jié)構(gòu)的地震響應(yīng)。。[關(guān)鍵詞] 結(jié)構(gòu)-土-結(jié)構(gòu)相互作用; 相對距離; 地震反應(yīng); 振動衰減中圖分類號：TU311.3 文獻標識碼：A 文章編號：1002-848X(2013)S2-0411-03*國家自然科學基金資助項目(51078032)。作者簡介：豆麗萍，碩士研究生，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
