移动荷载作用下土—结构共同作用的积分方程法分析(英文)

Integral equations methods for dynamic interactions between soil and superstructure under a moving point load

根据饱和土体Biot理论,采用薄板理论与最小势能及子结构法,将土—结构作为整体系统,利用接触边界处位移连续、应力平衡条件,建立了移动荷载作用下饱和土体上部结构振动的积分方程,然后再利用Fourier逆变换,得到土体、结构及基础筏板在时间—空间域内的位移、应力,并利用文中方法进行了算例分析.

Based on Biot＇ s theory, the minimum potential energy principle, as well as the thin plate theory,the superstructure, raft and soil are assumed to be a whole system according to the substructure method. The system must satisfy the continuity conditions at the interface between the superstructure,raft and soil surface. Given the compatibility condition that the vertical displacement of the interface between the raft and the saturated soil should be equal,the integral equation accounting for the vertical coupling of the superstructure-raft system with the saturated soil subject to a moving load is constructed. Using the nu- merical inverse transform technique, the paper obtains the forces and displacements of the saturated soil and superstructure in the space domain. Some numerical results are presented in addition to demonstrate the capacity of the proposed model.