文章基本信息

标题：An Area-based Intensity Measure for Incremental Dynamic Analysis
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作者：Ying Zhou ; Mengjie Li
期刊名称：Journal of Asian Architecture and Building Engineering
印刷版ISSN：1346-7581
电子版ISSN：1347-2852
出版年度：2015
卷号：14
期号：2
页码：451-457
DOI：10.3130/jaabe.14.451
语种：English
出版社：日本建築学会、大韓建築学会、中国建築学会
摘要：Incremental Dynamic Analysis (IDA) is a parametric analysis method based on nonlinear dynamic analysis. It involves performing nonlinear dynamic analysis of the structural model to a suite of ground motion records, each scaled to multiple levels of intensity (as measured by Intensity Measure, IM), and recording the responses (measured by Engineering Demand Parameter, EDP). An IDA curve combines the intensity measure of a site-specific ground motion with structural responses from nonlinear dynamic analysis of the given structure. It is thus an unavoidable fact that the IDA curves display large record-to-record variability. This observed dispersion relies closely on the IM used. In other words, different IMs can lead to various results from the IDA method. The aim of this paper is to find a proper IM with an advantage in efficiency for IDA analysis. An area-based IM, A(T1), which considers the period elongation due to nonlinear deformation was proposed. A 6-story reinforced concrete frame was modeled to compare the efficiency of the proposed IM with existing IMs. It is concluded that IMs which consider the higher modes effect fail to perform well due to the domination of the first mode of the frame. Taking nonlinearity development into consideration, A(T1) is more efficient than other existing IMs. Further research will focus on the area-based IM involving higher modes of the structures.
关键词：incremental dynamic analysis;intensity measure;area-based;efficiency;spectral acceleration value