Assessment of Overstrength-related Factors for Conventional Construction Concrete Shear Wall Archetypes in Canada using the Performance-Based Unified Procedure

Seismic force modification factors, including the ductility-related (Rd) and the overstrength-related factors (Ro) for different Seismic Force-Resisting Systems (SFRSs), are listed in the National Building Code of Canada (NBC). Overstrength-related factor represents the minimum dependable strength of the structure beyond its design level. National Research Council Canada (NRC) recently developed a performance-based unified (PBU) procedure to systematically calculate the seismic force modification factors for all existing and new SFRSs to be introduced into the code. Prior to the development of the PBU procedure, these factors in the code were originally developed based on engineering judgment.

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