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نهمین کنگره ملی مهندسی عمران
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • evaluation of simplified non-linear analysis methods in estimating the seismic collapse capacity of rc frames

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    • تاریخ ارائه: 1395/01/01
    • تاریخ انتشار در تی پی بین: 1395/01/01
    • تعداد بازدید: 688
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     incremental dynamic analysis (ida) procedure is currently considered as a standard tool for accurate estimation of the seismic demand and capacity of structures. the method requires several nonlinear response history analyses (rhas) of the structure for a set of ground motions, each scaled to multiple levels of intensity. recognizing that ida is extremely time-consuming for practical applications, some simplified pushover analysis-based methods have recently been developed by researchers. these methods often combine the nonlinear dynamic response of an equivalent single-degree-of-freedom (sdof) system with the results obtained from a standard pushover analysis to provide a rather closed-form solution for the collapse problem. this paper explores the accuracy and effectiveness of some approximate pushover analysis-based methods (i.e., spo6ida, mpa-based ida and hamidia et al. (2013) methods) in estimating the median sidesway collapse capacity of regular rc moment-resisting frames. four rc buildings with 3, 6, 9 and 12 stories are designed and subjected to the approximate analysis methods. a detailed comparison is then performed between the results obtained by the approximate methods with those given by the exact ida approach. finally, it is revealed that all the methods based on equivalent sdofs studied in this paper provide acceptable collapse capacity estimates of the frames. however, less accurate predictions are obtained by spo2ida and mpa-based ida methods for 16th and 84th fractile ida curves in all cases. the paper also presents additional guidelines to improve the mpa-based ida method in estimating the median collapse capacity of intermediate rc moment-resisting frames.

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