Numerical Study to Evaluate the Effect of Ductile Element in the Seismic Performance of Steel Frames with EBF

This paper presents the results of a numerical study, using ANSYS and OpenSees, of Ductile Element in the Seismic Performance of Steel Frames with eccentrically braced frame. This ductile element as dissipater includes a ring with a box around it that increases the ductility and energy dissipation of structures during an earthquake strike. It can be installed in every brace frame. Furthermore, during an earthquake, it contributes a significant portion of dissipated input energy by entry into the non-linear phase. Additionally, flexural plastic hinges are formed. With this, the entrance of other members to the non-linear phase is postponed. As a result, the buckling of the brace members is prevented. The box increases the capacity of the ductile members. The increase in the ring diameter and thickness results in a reduced ductility rate. Using a non-linear finite element analysis, the stresses and deformations under cyclic load are studied. The obtained hysteresis curves indicate that the element can act as an energy dissipating member, as well as a fuse to control the buckling of a brace. Moreover, this member can increase ductility in structures. Additionally, the operation of the ductility element in 2D eccentrically brace frames is considered. The non-linear time history analysis is conducted by OpenSees. The achieved results showed a decrease in the base shear and rotation of the link beam and an increase in ductility.