期刊名称：International Journal of Electronics, Communication and Soft Computing Science and Engineering
印刷版ISSN：2277-9477
出版年度：2013
卷号：2
期号：8
出版社：IJECSCSE
摘要：The recent development in the computer application has helped the structural engineering field significantly. The amount of time and efforts required for the analysis decreased drastically with the development of civil engineering software's. The Non-Linear Time History Analysis (NL-THA) of seismic evaluation of a structure is precise, but tedious and requires a lot of data and human skill to perform. Research has been put in to develop Non-Linear Static Procedures which can yield results close enough to the NL-THA procedure. The present study is based on Energy based pushover analysis, with considering the effects of higher modes on the response of the structure. The RCC moment resisting frames considered, were loaded and designed according to IS-1893-2002 (Part-1). The structures were analyzed for monitored roof-displacement of 4% of the total height. Existing nonlinear static (pushover) methods of analysis establish the capacity curve of a structure with respect to the roof displacement. Disproportionate increase in the roof displacement, and even outright reversals in the case of higher modes pushover analyses, can distort the capacity curve of the equivalent SDOF system. Rather than viewing pushover analyses from the perspective of roof displacement, this paper considers the energy absorbed (or the work done) in the pushover analysis. Simple relations are developed in energy-based displacement that is equivalent to the spectral displacement obtained by conventional pushover analysis methods within the linear elastic domain. Extensions to the nonlinear domain allow pushover curves to be established that resemble traditional first mode pushover curves and which correct anomalies observed in some higher mode pushover curves
