Abstract
In this study the effect of steel core strain hardening ratio of Buckling-Restrained Braces (BRBs) on residual drift demands of Buckling-Restrained Braced Frames (BRBFs) was assessed by using Probabilistic Seismic Demand Analysis (PSDA) methodology. Results show that by mere 1% change in strain hardening ratio, the residual drift demands of low and medium-rise studied frames experienced significant increment and restoring ability of BRBFs reduced meaningfully. On the other hand, maximum drift demands were approximately independent from strain hardening ratio. Given that, the large permanent drifts can make serious serviceability issues after earthquakes, accurate material tests play an important role in structural safety.
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