Eurocode‐8‐conforming seismic design and behaviour factor of high‐post‐yield stiffness concentrically‐braced steel frames

A seismic-resistant steel frame with energy-dissipating, chevron-type braces is proposed. The are equipped replaceable hourglass-shaped pins made of duplex stainless steel. Under design seismic loading, energy dissipated through inelastic deformations confined in the while other members remain essentially elastic. As a result, exhibits high post-yield stiffness due to inherent properties stainless-steel pins. Eurocode-8-based methodology adopted for and assessed following Eurocode-8-compatible INNOSEIS approach. Specifically, overstrength factor evaluated nonlinear pushover analysis behaviour incremental dynamic considering medium seismicity site-specific ground motion suites. determined satisfies global collapse prevention life safety objectives also keeping maximum residual inter-storey drifts below 1/300 permit an easy substitution damaged after level earthquake.