Seismic behavior of Viscoelastic and Friction Passive Damping System in Steel Structures by Near Fault Field

In recent years, considerable attention has been paid to research and development of structural control devices, with particular emphasis on alleviation of wind and seismicresponse of buildings. The performance of this devices based on dissipating the energy due to dynamic loading, by creation particular deformation and mechanical applying. The operation of this devices cause that the energy of the other structural elements hasbeen reduced and large deformation not to be occurred. Results of structures withdampers (viscoelastic damper, friction damper and combination of both dampers) werecompared with the results of structures without damper. Increasing trend in dissipating energy was observed. Then, the behavior of these dampers in frames of 4, 8 and 12 stories was studied by modeling the damper directly. The analyses were conducted via nonlinear time history technique and by using earthquake records (near fault) scaled withpeak acceleration and SAP 2000 14.2.2 software. Eventually for increasing the capability of the designer to select the effective control system, the efficiency of various dampers has been compared. A result of this study demonstrates that utilization of these dampers could improve seismic performance of moment resisting and reduce seismic response ofstructure.

Keywords:

Energy dissipating , Moment resisting frame , friction damper , viscoelastic damper