Study on the Effect of Distribution of Viscous Damper for Steel Frame Structure

The main objective of the current study is to reduce the structural response after a steel ten floors building was exposed to earthquakes by using viscous fluid dampers. The building response is studied for two conditions in which the first is without damper and the second by using damper and for tow conditions four seismic excitement earthquakes were selected in this study. Parametric study is employed which include the type of damper, the vertical and horizontal distribution of d, the engineering properties of finder, and the support effect of building. The software used for the analysis is SAP2000 v14 using linear time history analysis. The dampers are installed in the outer frames of the structure and in six different shapes (single one, single two, cross one, cross two, chevron one, chevron two bay damper) and compare between them and choose the best shape, which is a cross two bay damper, which noted a high decrease in seismic response. Then, the number of dampers in the structure is reduced by placing it in five floors, which achieves a decrease in the seismic response as well as a decrease in the cost. The parameters that are used to define the seismic response are the maximum displacement, drift ratio and base shear. (paper)