移动荷载作用下饱和土体上筏板—上部结构的动力响应分析(英文)  

Dynamic responses of the vibration of the raft-superstructure on the saturated soil under moving load

作　　者：徐满清[1] 陈学嘉[1] 徐斌[1] 罗浩[1] 李朋[1] 

机构地区：[1]南昌工程学院土木与建筑工程学院,江西南昌330099

出　　处：《南昌工程学院学报》2012年第1期28-33,共6页Journal of Nanchang Institute of Technology

基　　金：Supported by National Natural Science Foundation of China(No.50969007 and 50978099);Ph.D.Programs Foundation of Ministry of Education of China(No.20100480609);Natural Science Foundation of Jiangxi Province(No.20114BAB206012);Project of Jiangxi Provincial Department of Education Science and Technology(No.GJJ12629 and GJJ11252);the Second Round Students'Scientific Research Training Plan of Nanchang Institute of Technology~~

摘　　要：根据饱和土Biot理论与最小势能原理及薄板理论,采用子结构法,把上部结构、基础和地基作为一个共同作用的整体,在接触界面上满足变形协调条件,建立移动荷载作用下饱和土体地基—筏板—上部结构共同作用的积分方程.对积分方程的数值求解和相应的Fourier逆变换,得到任意时刻上部结构、筏板的内力和位移以及地基反力.最后通过数值计算,分析了饱和土体参数、移动荷载的速度等对上部结构水平、垂直方向的振动的影响特点.数值结果表明,上部结构各层的水平位移、竖向位移都随荷载速度增大而增加.竖向位移随楼层增加变化不大,当荷载速度较低时,水平位移随上部结构高度的变化曲线平滑少弯折,说明振动较稳定.但当荷载速度较高时,水平位移随楼层变化曲折越明显,层间差异大.Based on Blot＇ s theory and the minimum potential energy principle as well as the thin plate theory, the superstructure, raft and soft are assumed to be a whole system according to the substructure method. The system must satisfy the continuity conditions at the interfaces between the superstructure, raft and soil surface. Considering the compatibility condition that the vertical displacement of the interface between the raft and the saturated soil should be equal, the integral equation ac- counting for the vertical coupling of the superstructure-raft system with the saturated soil subjected to a moving load is con- structed. Using the numerical inverse transform technique,the forces and displacements of the superstructure,plate and saturated soil at any time are obtained. Some numerical results are presented to demonstrate the capacity of the proposed model. Also,the influence of load velocity on the superstructure is investigated in this paper.

关 键 词：BIOT理论 饱和土地 筏板 上部结构 积分方程 

分 类 号：TU471[建筑科学—结构工程]