Investigation on Effective Parameters for Seismic Dam-age Control of Steel Moment Frame

In recent building standards, seismic damage of structures represents by local or global dis-placements and rotations. However, the effect of dissipated energy of members and the whole structure is not participated directly. Therefore, several damage indices are developed, con-taining the effect of drifts and dissipated energy including Park and Ang damage index. In this study, we found the most appropriate design of a one bay and one story steel moment re-sisting frame using modified Park and Ang damage index (DI) as seismic damage representa-tive, to satisfy the strong-column weak-beam (SC/WB) criteria and, reach maximum energy dissipation of the simple frame. Then, the correlation between PGA and DImax occurrence time is investigated for each record and each design scenario. Finally we examined the effi-ciency of 4 energy dissipation devices usage in passive and semi-active control systems and the maximum of modified Park and Ang DI values compared to uncontrolled DImax in several cases. This paper demonstrates that there is a good time correlation between PGA and DI, particularly in the range of the appropriate design due to modified Park and Ang DI which di-rectly take dissipated energy into account. This study also showed that, for mentioned simple frame and the criteria developed in this paper, passive viscoelastic and viscous dampers are the most effective devices in dissipating energy

Keywords:

Damage Index , Moment Resisting Frame , Time Correlation , Energy Dissipation Devices