Comparative Study for Seismic Response of Various Seismic Force-Resisting Systems Employed in New Buildings in Erbil City

Abstract

Tall buildings (TBs) are becoming increasingly prevalent in urban areas, posing unique challenges for their structural design and seismic performance. In Erbil city, flat slab construction with special reinforced concrete shear walls is commonly used in TBs, although it may not comply with international standards like ASCE7 and IBC without validation through nonlinear analysis. This study investigates the seismic performance of various seismic force-resisting systems employed in tall buildings in Erbil city, utilizing ACI318 for the design of the reinforced concrete structures and ETABS software for the analysis. Four structural systems were analyzed: Dual Systems with Special Moment Frames, Special Reinforced Concrete Moment Frames, Reinforced Concrete Ductile Coupled Walls, and Special Reinforced Concrete Shear Walls. Key structural responses, including stiffness, fundamental period of vibration, mass participation ratio, story displacement, inter-story drift ratio, story shear, and overturning moment, were examined. Dual Systems and Special Moment Frames demonstrated superior management of these parameters, thereby enhancing overall structural performance. The study underscores the importance of selecting appropriate seismic systems based on building height, with particular attention to the limitations posed by ductility and stability in taller structures.