عنوان مقاله [English]
Usage of yielding dampers, through an effective guidance of damages to some restricted and predefined special areas of the structure. In addition to the energy dissipation of earthquake, leads to the simplicity and cost reduction of the repairs for the damaged structure after an earthquake. In this paper, a new connection detail with pipe dampers is proposed in which entrance energy is dissipated by the plastic behavior of steel material. The suggested dampers are quickly replaceable, which is a great advantage for serviceability of the structure after an earthquake. In this research, behavior of the suggested connection is compared with other moment resisting steel connections, such as conventional welded connections and moment connections with slit dampers. Results show that by using pipe dampers in beam in column connections, development of undesirable inelastic deflections in the main members, such as beams and columns, is prohibited. Moreover, stiffness, strength, and ductility of these connections stay in a suitable range are compared to the conventional moment-resisting connections. Stiffness, energy absorption, and strength of the connections with pipe dampers vary in the ratios of the capacity of the pipe damper to the plastic capacity of steel beam. This is a controllable parameter in the design of the dampers. Investigations on the effect of the capacity of the dampers show that using pipe dampers with capacity ratios more than 70% will cause plastic deflections in the main members, such as beams and columns. Based on these results, in order to take the optimized usage of the beam bending capacity and prevent the development of unsuitable plastic deflections in beams and columns, it seems that suggested pipe dampers should be designed so that their ultimate bending capacity can be about 50% of the beam plastic bending capacity.