TY - JOUR ID - 3305 TI - Probabilistic Seismic Assessment of RC Buildings Considering Soft and Extreme Soft Story irregularities Subjected to Main Shock-Aftershock Sequences JO - Amirkabir Journal of Civil Engineering JA - CEEJ LA - en SN - 2588-297X AU - Kouhestanian, Hamed AU - pahlavan, hossein AU - Shafaei, Jalil AU - Shamekhi amiri, mohammad AD - Faculty of civil engineering, SHahrood university of technology AD - faculty of civil engineering, Shahrood university of technology, AD - Faculty of Civil engineering, Shahrood University of Technology, Shahrood, Semnan, Iran AD - Assistant Professor of Civil Engineering; Shahrood University of Technology Y1 - 2021 PY - 2021 VL - 53 IS - 2 SP - 457 EP - 478 KW - Probabilistic Assessment KW - Reinforced Concrete Moment-Resisting Frame KW - Soft Story KW - Fragility Curves KW - incremental dynamic analysis (IDA) DO - 10.22060/ceej.2019.15385.5906 N2 - Recent Iranian earthquake damages like the damages caused by the Kermanshah earthquake revealed that RC buildings having soft-story irregularities experienced more seismic vulnerability. Moreover, earthquake aftershocks increased the seismic failures in past earthquake events. But they are not included in recent seismic design codes. In this article, for assessing the effects of soft-story irregularities and also the earthquake aftershocks, 3,5 and 8 story RC models having intermediate sway frames are designed and then modeled in OPENSEES and then IDA analysis is performed in order to produce the seismic fragility curves consistent with HAZUS definitions. The resulting seismic fragility curves revealed the influence of soft-story irregularities and also main shock-aftershock sequences on the vulnerability of considered RC models. By increasing the height of the RC structures, the effects of soft-story irregularities and the aftershocks decreased in the seismic vulnerability of the considered buildings. UR - https://ceej.aut.ac.ir/article_3305.html L1 - https://ceej.aut.ac.ir/article_3305_4487597c9f53deade084dcd754eba19f.pdf ER -