基于子结构方法的土-结构动力相互作用半解析方法研究现状综述

A systematic review of semi-analytical substructure method applied in soil-structure dynamic interaction

寻求高效实用的力学模型和计算方法是土与基础动力相互作用效应在工程设计中得以考虑的关键。围绕3个问题对可以通过手算或自主编程解决土-基础-结构系统动力相互作用问题的半解析子结构法展开评述:(1)为何采用子结构法研究土与结构动力相互作用问题;(2)如何求解子结构法中作为关键参数的基础振动阻抗;(3)如何利用振动阻抗求解上部结构的动力响应。最后,结合实际工程问题探讨了在已有成果的基础上可进行深化和拓展的研究方向。

Areasonably accurate model with computational validity and efficiency for soil-structure interaction(SSI)is of preponderant significance in practical design.This paper reviews the issues and developments in the field of soil-structure interaction analysis based on the semi-analytical substructure method,which allows engineers to conduct calculations by hand or with minimum computational efforts.The discussion centers around the following three questions:(1)Why use the substructure method to study the SSI problem?(2)Howtodetermine the foundation impedance which is a key parameter in the substructure approach?(3)How to incorporate the foundation impedance with the conventional governing equations for analyzing the seismic response of the soil-foundation-structure system?Finally,further extensions of the previous work are proposed to help the civil engineers to improve the design of important structures.