رفتارغير خطي قابهاي مهار بندي شده برون محور با اتصالات نيمه صلب

Non-linear Behavior of Eccentric Braced Frames with Semi-Rigid Connections

Eccentric Braced Frames (EBF) are widely used in steel structures in which the beam-column connections usually have a ftoll/illear semi-rigid behavior. This behavior greatly influences that of tile Eccentric Braced Frame. In this research at! parts of the steei frames including beam-column conne ctions were modeled thr ee-dim ensionally using she ll elements. The nonlinear static pu sh over analysis was used f or th ese fram es ill ANS YS. In tile first stage, the effects of the con nections Oil lateral ultimate strengtil, capacity of energy dissipution, elastic stiffness, and EBF du ctility fa ctor were investigated. Tlte result s showe d thut tire seismic behavior of the semi-rigid EBF was better than botlr the simple and the rigid EBFs. In th e second stage, tile effect of ttte link beam length was studied and tile nonlinear and seismic behaviors of EBF were compared f or II variety of situations. Finally, the best length of tile link beam in the semi-rigid EBF was determined