Evaluation of the Effect of Connection between RC Shear Wall and Steel Moment Frame on Seismic Performance and Reduction Factor in Dual Systems

Dual systems of steel moment frame and reinforced concrete shear wall have combined the advantages of steel frames and reinforced concrete shear wall. These walls have increased the lateral stiffness of steel frames and have reduced seismic demands on steel frames thus providing opportunities to use such system. In this research intermediate dual system of steel moment frame was chosen with intermediate reinforced concrete shear wall in forms of 3, 6 and 9 story structures, similar plan and three manners of burried column in shear wall, non burried column connected to shear wall and non burried column separated frome shear wall using ETABS 2000 software and it was designed according to equivalent static analysis. In order to evaluate effect of connection between RC shear wall and steel moment frame on seismic performance and reduction factor of systems, all structures have been modelled on PERFORM- 3D software and static pushover analysis has done according to the instruction for seismic Existing buildings (360 Iranian code) and FEMA 356. The results of static pushover analysis on structures show that in dual systems of steel moment frame and reinforced concrete shear wall, the model of connection of burried column in shear wall is more regarding its deformability, strength and capacity of energy dissipation and the interaction between frame and wall is also better rather than two types of non burried column in wall. Type of wall connection to frame on reduction factor of dual systems of steel moment frame and RC shear wall has no effect in mentioning structures.