典型框架结构与剪力墙结构间SSSI效应非线性有限元分析

Nonlinear Finite Element Analysis of SSSI Effect Between Typical Frame Structure and Shear Wall Structure

以典型的框架结构和剪力墙结构为研究对象,在考虑初始静力条件、结构-土体非线性特征的条件下进行二维有限元分析,研究了不同地震动作用下不同类型结构间结构-土-结构相互作用(structure-soil-structure interaction,SSSI)的响应特征。研究表明:1)地震中框架结构和剪力墙结构对SSSI效应的表现不同,且各部位的动力响应存在较大差异。2)中栋与边栋的动力响应表明结构存在相对有利的位置,并且受到结构类型和地震动频谱特性的影响有不一致的规律。3)SSSI效应受地震动频谱特性影响较大,随着低频成分的增多结构响应更为不利,远场波作用下结构安全需要重视。

A typical frame structure and shear wall structure is used as the research object,and the response characteristics of structure-soil-structure interaction(SSSI)between different types of structures under different ground vibrations are studied by two-dimensional finite element analysis with consideration of initial static conditions and structure-soil nonlinear characteristics.Research shows that:(1)The frame structure and shear wall structure behave differently to the SSSI effect in an earthquake,and there are large differences in the dynamic response of each part.(2)The dynamic response of the middle and side buildings indicates the existence of relatively favorable positions of the structure,and there is an inconsistent pattern influenced by the type of structure and the spectral characteristics of ground shaking.(3)The SSSI effect is influenced by the spectral characteristics of ground shaking,and the structural response is more unfavorable with the increase of low-frequency components,and the structural safety under the action of far-field waves needs attention.