《Earthquake Engineering and Structural Dynamics》杂志刊登“模态耦合效应下中间层隔震建筑物的分析与实验研究”

作者：Shiang-Jung Wang, Jenn-Shin Hwang, Kuo-Chun Chang, Meng-Hui Lin, Bo-Han Lee

刊物：《Earthquake Engineering and Structural Dynamics》，2013年，42卷第2期，201-219页

关键词：中间层隔震建筑物；隔震；高阶模态；模态耦合；振动台试验

摘要：中间层隔震建筑物是指将隔震系统放在了建筑物的中间层而不是建筑物的基础部位。由于中间层隔震建筑物下部结构的灵活性，所以中间层隔震建筑物的高阶模态对其地震响应的贡献是不容忽略的，特别是在高阶模态耦合效应存在的情况下。本文设计了一个含有三个集中质量模型的简单中间层隔震建筑物来研究模态耦合响应。通过等效线性分析和振动台试验研究，发现高阶模态耦合效应会放大地板层和隔震上层结构上的加速度响应。因此，本文提出了一个简单的方法来防止由高阶模态耦合效应造成的中间隔震建筑物上层和下层结构的不当设计。

Analytical and experimental studies on midstory isolated buildings with modal coupling effect

Authors: Shiang-Jung Wang, Jenn-Shin Hwang, Kuo-Chun Chang, Meng-Hui Lin, Bo-Han Lee

Journal: Earthquake Engineering and Structural Dynamics, Volume 42, Issue 2, pages 201–219, February 2013

Key words: midstory isolated building; seismic isolation; higher modes; modal coupling; shaking table test

Abstract: In a midstory isolated building, the isolation system is incorporated into the midstory rather than the base of the building. Because of the flexibility of the substructure below the isolation system in a midstory isolated building, the contribution of higher modes to the seismic responses of the midstory isolated structure may not be negligible, especially when the coupling of higher modes exists. To investigate this modal coupling effect, a simplified three-lumped-mass structural model of the midstory isolated building is assumed in this study. Through the equivalent linear analysis and shaking table tests, it is found that the coupling of higher modes may lead to enlarged acceleration responses at the super-floor and superstructure above the isolation layer. Accordingly, a simple method to prevent the midstory isolation design from the coupling of higher modes attributed to the improper design of the substructure and superstructure is proposed in this paper.

原文链接：http://onlinelibrary.wiley.com/doi/10.1002/eqe.v42.2/issuetoc