考虑土-结构相互作用体系地震反应谱分析

考虑相互作用体系地震分析中，人工边界的施加是一个关键问题.重点介绍了黏-弹性边界在SAP2000的实现方法.以一个框架为例计算了不同场地土-结构相互作用体系的周期变化，并基于设计反应谱计算了考虑/不考虑相互作用的地震总作用力和上部结构顶层最大位移.当考虑相互作用后，尤其是软土，上部结构的周期、地震作用力、顶层最大位移有较大变化.

Earthquake Response Spectrum Analysis of Considering Soil Structure Interaction

The application of artificial boundary is a key issue in seismic analysis of the interaction system. The method that how to implement the viscous elastic boundary in SAP2000 was introduced and a framework module was set up and cycle variation of a series of different site soil considering soil structure interaction was calculated. Besides， based on the design response spectra， total seismic force and maximum displacements of the upper structure were calculated， when considering the interaction or not. When the interaction was considered， especially the soft soil， the cycle of upper part， seismic force， maximum displacement of top level changed greatly.