基于土层位移差的地下结构抗震反应位移法分析  

Response displacement method for seismic analysis of underground structures based on soil layers displacement difference

作　　者：董正方[1] 王君杰[1] 王文彪[1] 姚毅超[1] 

机构地区：[1]同济大学桥梁工程系,上海200092

出　　处：《振动与冲击》2013年第7期38-42,47,共6页Journal of Vibration and Shock

基　　金：住房和城乡建设部科技项目(2008-k3-1);国家自然科学基金重大研究计划(90715022)

摘　　要：采用平面弹性理论复变函数方法,推导具有小孔无限介质在无限远处受剪应力的水平位移,得出有小孔与无小孔的位移关系,应用在基于土层位移差的反应位移法土层位移求解。为验证该方法的适用性,设某地质条件下典型圆形盾构隧道与矩形地下车站为基准模型,用不同方法求解土层位移,用反应位移法计算土体刚度变化的结构内力。结果表明,基于土层位移差的反应位移法适用于埋深较大的地下结构,不适用硬土情况;对地基弹簧刚度求解精度要求较高。Based on complex variable function method of plane elasticity theory, lateral displacement of infinite medium with an opening was derived subjected to a far field shear stress, then the displacement relationship between the medium with an opening and that without an opening was also obtained, it was applied to solve soil layers displacement of response displacement method based on soil layers displacement difference. The performance of the method was evaluated and compared with that of the typical response displacement method through several selected benchmark numerical examples, such as circular shield tunnels and rectangular underground stations. It was shown that the response displacement method based on soil layers displacement difference is suitable for deeper underground structures and not suitable for cases of hard surrounding soil; the method depends on the solved precision of soil spring stiffness.

关 键 词：反应位移法 地下结构 土层位移 复变函数 

分 类 号：TU311.4[建筑科学—结构工程] TU93