地震作用下河流对成层中软土上建筑物的影响  

Seismic effect of river on nearby structure on layered medium-soft-soil

作　　者：杨书燕[1] 姜忻良[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《哈尔滨工业大学学报》2006年第3期484-488,共5页Journal of Harbin Institute of Technology

基　　金：天津市科技发展计划资助项目(043113111)

摘　　要：为了研究河流对成层中软土地基上建筑物地震反应的影响.构建了河流-土体-结构体系动力相互作用的非线性完全有限元计算模型,在考虑土体重力的前提下,分别采用3条地震波对此相互作用体系进行了时域内数值分析.结果表明,建筑物靠近河流时,结构顶层总位移、基础的水平移动和转动明显增大,并产生了明显的不可恢复偏移;软弱夹层的存在使整个相互作用体系的地震反应增大.The seismic behavior of the structure on The non-linear finite element model of interation is layered medium-soft-soil affected by the river is studied. set up, which involves soil, fiver and structure. On the premise of considering gravity, this interaction model is analyzed with time domain numerical method under three seismic waves. The result of calculation shows that when structure is colse to the river; the total displacement at the top of superstructure, the movement and swing of the foundation increase obviously, accompanied by irreclaimable excursions. Because of the soft soil sandwich, the earthquake responses of the interaction system are increased.

关 键 词：河流 成层中软土 相互作用 时域 软夹层 

分 类 号：P315.9[天文地球—地震学]