97-0004 Investigation of Seismic Response of Buildings with Linear and Nonlinear Fluid Viscous Dampers A.A. Seleemah and M.C. Constantinou 1997 University at Buffalo 302 PB98109002 35 This report presents results of the first systematic experimental study of nonlinear fluid viscous dampers. Earthquake simulation tests have been performed on one- and three-story model structures with and without linear and nonlinear viscous dampers. The experimental results demonstrated significant reductions in response when dampers, whether linear or nonlinear, were added to the structural frame. Moreover, direct comparisons of responses of the structure with linear and nonlinear dampers elucidated further benefits offered by the nonlinear devices and identified potential drawbacks. The experimental response has been compared with predictions of response history and simplified methods of analysis. The latter methods has been based on the linear static procedure of the NEHRP Guidelines for the Seismic Rehabilitation of Buildings. Comparisons of analytical and experimental responses showed good agreement. Linear fluid viscous dampers. Nonlinear fluid viscous dampers. Shaking table tests. Analytical models. Time history analysis.