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According to the National Building Code of Canada, the seismic force resisting systems (SFRS) of reinforced concrete (RC) buildings are classified based on their ductility level as being ductile, moderately ductile and conventional construction systems. The selection of the ductility level of an SFRS at the conceptual design phase is primarily governed by the seismicity at the building location, the building dynamic characteristics, and the height limitations specified by the design code. The selected ductility level affects the design loads, the cross-sections and reinforcement of the SFRS components, and hence the overall construction cost. This paper aims to evaluate the effect of the wall’s selected ductility level on the quantities of its constituent materials as well as the rebar detailing. Four multi-storey RC shear wall buildings with different heights located in three different cities in Canada; Toronto, Montreal, and Vancouver, were selected to represent three different seismic hazard zones (low, medium, and high). For each building height and location, the walls were designed using the dynamic analysis procedure of the National Building Code of Canada to reach different ductility levels. The construction material quantity estimates were evaluated and compared to a reference case for each building height, seismic hazard and ductility level. The effect of ductility level on the bars detailing is also investigated. This paper helps the structural engineers to select the cost-effective and constructible RC shear wall system at the conceptual design phase before reaching the detailed design phase.

Effect of Preliminary Selection of RC Shear Walls’ Ductility Level on Material Quantities