Comparing Seismic Performance of Yielding Damped Braced Frames with Mild and Low-Yield Steel in Typical Steel Buildings

In this paper, the seismic performance of typical steel buildings with yielding damped braced frames of mild steel (MS) and 20-30% opening is compared to that having low yield steel (LYS). For this purpose, one story frames are first modeled by "ANSYS" software, then calibrating the results, these structures are carefully modeled with the same geometry and section using "SAP2000" software. Using the validated models, five and seven story frames are analyzed by the push over method in "SAP2000" software.The results demonstrate that the seismic response of these frames improves if low yield steel instead of mild steel is used in central frame system. The results for the frame with damper included: stiffness increase minimum 1.5 times, at least 50% reduction of yielding point displacement, hysteretic curves improvement and formation of the main plastic hinges on the members of the yielding damped braced frames.