Seismic Performance of Rehabilitated Moment Frame with Steel Shear Wall by Considering Structural Uncertainties

In performance-based seismic engineering, conservatism in acceptance criteria has increased the cost of rehabilitation. Considering of uncertainties can reduce the conservatism and the cost of rehabilitation. In this study, reliability of rehabilitated structure with steel shear wall has been discussed and study of reliability index has been performed on probabilistic variables. The studied structure is nine-story steel moment frame that has been analyzed pre-and post-rehabilitation. The results have indicated that yield strength of steel shear wall has the greatest effect on the structural response of other probabilistic variables. According to results, the rehabilitation of the structure has decreases probability of failure and consideration of uncertainties of rehabilitated structure has increased probability of failure and therefore existing conservatism has been decreased.