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Structural Engineering and Mechanics
  Volume 68, Number 6, December25 2018 , pages 647-660

Evaluation of seismic collapse capacity of regular RC frames using nonlinear static procedure
Maysam Jalilkhani and Ali Reza Manafpour

    The Incremental Dynamic Analysis (IDA) procedure is currently known as a robust tool for estimation of seismic collapse capacity. However, the procedure is time-consuming and requires significant computational efforts. Recently some simplified methods have been developed for rapid estimation of seismic collapse capacity using pushover analysis. However, a comparative review and assessment of these methods is necessary to point out their relative advantages and shortcomings, and to pave the way for their practical use. In this paper, four simplified pushover analysis-based methods are selected and applied on four regular RC intermediate moment-resisting frames with 3, 6, 9 and 12 stories. The accuracy and performance of the different simplified methods in estimating the median seismic collapse capacity are evaluated through comparisons with the results obtained from IDAs. The results show that reliable estimations of the summarized 50% fractile IDA curve are produced using SPO2IDA and MPA-based IDA methods; however, the accuracy of the results for 16% and 84% fractiles is relatively low. The method proposed by Shafei et al. appears to be the most simple and straightforward method which gives rise to good estimates of the median sidesway collapse capacity with minimum computational efforts.
Key Words
    seismic collapse capacity; IDA method; nonlinear static analysis procedure; RC moment-resisting frames
Maysam Jalilkhani: Engineering Faculty of Khoy, Urmia University, Khoy, Iran
Ali Reza Manafpour: Department of Civil Engineering, Urmia University, Urmia, Iran

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