Probabilistic seismic assessment of moment resisting steel buildings considering soft-story and torsional irregularities

被引：0
作者：
Razmkhah M.H. [1 ]
Kouhestanian H. [2 ]
Shafaei J. [2 ]
Pahlavan H.
Shamekhi Amiri M. [2 ]
机构：
[1] Department of Civil Engineering Faculty, University of Semnan, Semnan
[2] Department of Civil Engineering, Shahrood University of Technology, Shahrood
来源：
International Journal of Engineering, Transactions B: Applications | 2021年 / 34卷 / 11期
关键词：
Incremental dynamic analysis; Probabilistic seismic assessment; Soft-story; Steel moment resisting frame; Torsional irregularity;
D O I：
10.5829/IJE.2021.34.11B.11
中图分类号：
学科分类号：
摘要：
In this study, the fragility curves were developed for three-, five-, and eight-story moment resisting steel frame structures with considering soft story and torsional irregularities during the earthquake mainshock to assess the probabilistic effects of irregularities in plan and height of steel structures. These models were designed according to Iranian seismic codes. 3D analytical models of steel structures were created in the OpenSees software platform and Incremental Dynamic Analysis (IDA) was conducted to plot the IDA curves. The maximum value of inter-story drift was selected as the demand parameter and the capacity is determined according to the HAZUS-MH limit states; finally, the corresponding fragility curves were developed. The results of the 3D nonlinear dynamic analysis indicated that the damage state of the structure due to soft story irregularity was decreased with increasing stories. On the other hand, the damage caused by torsional irregularity in plan was increased by increasing the height of the structure. For example, in the 3-story structure, soft-story effect on damage probability was more dominant than torsional irregularity. © 2021 Materials and Energy Research Center. All rights reserved.
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页码：2476 / 2493
页数：17
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