Seismic risk analysis of steel-MRFs by means of fragility curves in high seismic zones

In this study a steel moment resisting frame in a high seismic prone area in Iran has been remodeled based on different versions of Iranian Seismic Code (Standard No. 2800 1988, 1999, 2005) to estimate the seismic fragility and mean annual loss for the modeled buildings. At the first stage a probabilistic seismic hazard analysis (PSHA) has been performed to extract hazard curve in CRISIS platform. (Akkar and Bommer 2007) earthquake prediction model for the Middle East has been used in the hazard analysis. In the next stage, hundreds of nonlinear incremental dynamic analyses by means of lumped-parameter based structural models have been simulated and performed to extract the fragility curves by using OpenSees. Consequently by combining the hazard curves, judgmental event trees and seismic fragility curves for the extensive damage mode (EDM), the required annual loss curves are extracted.