地下结构横断面地震反应简化计算方法探讨  

Simplified Seismic Analysis Methods for Underground Structures with Rectangular Cross Section

作　　者：龚成林[1] 宋二祥[1] 刘光磊[1] 

机构地区：[1]清华大学土木系地下工程研究所,清华大学结构工程与振动教育部重点实验室,北京100084

出　　处：《地下空间与工程学报》2009年第4期724-729,共6页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(50378050);北京市自然科学基金重点项目(8061003)

摘　　要：针对矩形断面地下结构断面内地震变形及内力分析的相互作用系数法进行研究。首先分析了柔度比、结构埋深及尺寸等对土-地下结构相互作用系数的影响,提出在考虑这些因素影响的情况下相互作用系数的计算方法;进而针对目前文献中多考虑地下结构变形的计算,对相应内力的计算研究较少的情况,提出了一种加载方法。利用该方法,可由已计算的结构变形算出较准确的结构内力;最后,对所提出的加载方法的主要影响因素进行了分析。Based on the soil - structure interaction coefficient method, the sectional seismic response of underground structures with rectangular cross section is investigated. Firstly the factors influencing the soil - structure interaction coefficient, including the flexibility ratio, the burial depth and the structural dimensions are analyzed. Noting the situation that calculation methods in many literatures can only give the shear deformation of the structures but have not enough consideration of internal force calculation, a simplified loading method is proposed to get the internal force with the already calculated deformation of the structures. Also, some important factors influencing the results of the loading method are analyzed.

关 键 词：地下结构 抗震设计 动力有限元法 土-结构相互作用系数 简化加载方法 

分 类 号：TU352.11[建筑科学—结构工程]