Development of Fragility Curves of Dual Steel Moment Frames coupled with Concrete Shear Walls with stiffness and resistance eccentricity

The arrangement of the centers of mass, resistance and stiffness has a great influence on the stability of the structure and its behavior against the moderate and strong earthquakes. In this study, three structural models with 6, 9 and 12 stories with dual bending system of intermediate steel frame coupled with concrete shear walls in three types of regular, irregular with stiffness and resistance eccentricity has been modeled using finite element software and fragility curves are depicted for different structural performance levels. Survey results showed that at immediate occupancy (IO) performance level the structure is still in the linear region and the probability of exceeding from collapse prevention (CP) performance level in the stiffness eccentricity model is higher compared to other models. Also, the probability of exceeding from the CP performance level in the resistance eccentricity model is higher than the other models because the structure arrives at the plastic region.