- Volume 10 Issue 1
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Probabilistic seismic evaluation of buckling restrained braced frames using DCFD and PSDA methods
- Asgarian, Behrouz (Civil Engineering Faculty, K. N. Toosi University of Technology) ;
- Golsefidi, Edris Salehi (Babol Noshirvani University of Technology) ;
- Shokrgozar, Hamed Rahman (Faculty of Technical and Engineering, University of Mohaghegh Ardabili)
- Received : 2013.10.27
- Accepted : 2015.11.16
- Published : 2016.01.25
In this paper, using the probabilistic methods, the seismic demand of buckling restrained braced frames subjected to earthquake was evaluated. In this regards, 4, 6, 8, 10, 12 and 14-storybuildings with different buckling restrained brace configuration (including diagonal, split X, chevron V and Inverted V bracings) were designed. Because of the inherent uncertainties in the earthquake records, incremental dynamical analysis was used to evaluate seismic performance of the structures. Using the results of incremental dynamical analysis, the "capacity of a structure in terms of first mode spectral acceleration", "fragility curve" and "mean annual frequency of exceeding a limit state" was determined. "Mean annual frequency of exceeding a limit state" has been estimated for immediate occupancy (IO) and collapse prevention (CP) limit states using both Probabilistic Seismic Demand Analysis (PSDA) and solution "based on displacement" in the Demand and Capacity Factor Design (DCFD) form. Based on analysis results, the inverted chevron (
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