SUMMARYModern self-centering controlled rocking special concentrically braced frame (SC-CR SCBF) is capable of reducing structural damage compared with conventional buildings following an earthquake. This investigation quantifies three seismic performance factors, including over-strength factor (Ω 0 ), period-based ductility (μ T ) and response modification coefficient (R), for low-and mid-rise SC-CR SCBFs. Nonlinear static analysis is conducted to derive Ω 0 and μ T factors for 12 SC-CR archetypes. Validity of trial R coefficient is also evaluated using a collapse-based assessment procedure by comparing adjusted collapse margin ratios with the established acceptance criteria. Results indicate that the Ω 0 and μ T factors are in the range of 1.39 to 2.29 and 12.25 to 29.0, respectively, and R of 8 is proposed for design of SC-CR archetypes. A reliability study is also performed to examine the effects of modeling and ground motion parameters on the safety margin of designed SC-CR archetypes with the proposed R value. Results indicate that the design of mid-rise space archetypes in high-seismicity regions with the R coefficient of 8 is more reliable than that of the low-rise perimeter ones in low-seismicity regions.

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