Abstract
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.
Highlights
Current seismic design codes allow nonlinear response of the seismic force resisting system (SFRS)
The objective of this paper is to evaluate the effect of selected SFRS level of ductility on the construction material quantity estimates and the bars detailing of reinforced concrete (RC) shear wall buildings
Four multi-storey RC shear wall buildings with different heights located in three different cities in Canada were selected
Summary
Current seismic design codes allow nonlinear response of the seismic force resisting system (SFRS). The DAP consume additional engineering time compared to the ESP, in many cases, the three-dimensional dynamic analysis can provide much more economical design Performing such detailed 3D analysis would not be feasible at the preliminary design stage where the final decision regarding the SFRS and its ductility level is not made yet. Adebar et al (2014) stated that the selection of ductility level for RC shear wall buildings depends mainly on the seismic hazard of the region They mentioned that conventional, moderately ductile, and ductile walls are the systems of choice in low, medium, and high seismic hazard zones, respectively. The objective of this paper is to evaluate the effect of selected SFRS level of ductility on the construction material quantity estimates and the bars detailing of RC shear wall buildings. This paper helps the designers for the most suitable selection of ductility level for RC shear wall buildings that satisfies the code requirements, while providing the most economical choice
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