استفاده از مهاربندهاي كمانش ناپذير در مقاوم سازي لرزه اي قاب هاي خرجيني

Seismic Retrofit of Khorjini Frames Using Buckling Restrained Braces

Khorjini (saddle) frame is one of typical structural systems in Iran and needs seismic retrofit based on previous research reports. In this paper, a sort of hysteresis dampers called buckling restrained braces (BRB) is considered and its behavior and design procedure are investigated to study its effect on seismic performance of steel frames. Finally, a typical khorjini (saddle) frame has been seismically retrofitted and was analytically subjected to the time-histories of the Naghan, Tabas and Northridge earthquakes. Numerical results showed that BRBs have high capability in seismic design of new structures and seismic retrofit of existing structures as well.