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Abstract
Reinforced concrete coupled shear walls is considered one of the most remarkable research topic within the last decades. It is globally introduced as an efficient lateral load resisting system which enhances the behavior of the overall structure subjected to lateral loads. Such system is widely used in the zones, which are expected to be exposed to severe seismic hazards. The coupled shear walls enable two walls or more than two to act as one wall with a certain efficiency, depending on how much coupling is going to be provided by what is known as the coupling beam. Coupling beams are going to be provided at each floor to connect the walls and constrain their behavior. Those beams are going to limit the axial deformation in each wall in terms of tension in the windward wall and compression in the leeward wall. Such action is going to induce internal couple due to the existing of the coupling beam. Finally, the overall behavior of the walls is going to be improved by the added beams in terms of energy dissipation, wall rotation, inter-story drift, peak roof drift, base shear and deflection profile. In this research, an extensive parametric had been undertaken to investigate the effect of the nonlinear behavior of the coupling beams on the coupled shear walls response in terms of system capacity to resist lateral load, roof drift, load-displacement relationship, crack pattern and the induced coupling ratio