建筑结构学报2013，Vol.34Issue(2)：53-60,8.
高层建筑结构增量动力分析的地震动强度参数研究
Study on intensity measure of incremental dynamic analysis for high-rise structures
摘要
Abstract
In this paper, typical characteristics, state of the art and existing problems of intensity measure ( IM) parameters are firstly summarized. To consider the contribution of higher modes for the incremental dynamic analysis ( IDA) of high-rise structures, an IM parameter in terms of the multiply of power-law functions was proposed, in which response spectra at major periods are the bottom number and corresponding modal mass participation proportions are the exponent. Then IDA of a high-rise SRC frame-RC tube structure was employed to investigate the efficiency of the proposed IM S12 and S123, in which the first two and three modes are considered, respectively. Comparison with PGA, PGV, Sa( T1 ,ξ) , S* proposed by Cordova was made as well. The results show that Sa( T1, ξ) is more efficient than PGA even for high-rise structures. PGV is proven to be efficient relative to the single spectral value Sa(T1,ξ) and measures S * and S12 presented by two spectral values, but deficient relative to the S123 presented by three spectral values. It is found that the more modes are considered, the more efficient the IM is. From the view of engineering application, S123 is recommended for the IDA of high-rise structures.关键词
高层建筑结构/增量动力分析/地震动强度参数/主要周期点/振型参与质量Key words
high-rise structure/ incremental dynamic analysis/ intensity measure/ predominant periods/ modal mass participation proportion分类
建筑与水利引用本文复制引用
周颖,苏宁粉,吕西林..高层建筑结构增量动力分析的地震动强度参数研究[J].建筑结构学报,2013,34(2):53-60,8.基金项目
国家自然科学基金项目(51078274,51021140006),上海市教育委员会科研创新项目重点项目(12zz036). （51078274,51021140006）
