95-0013 Experimental and Analytical Investigation of Seismic Retrofit of Structures with Supplemental Damping: Part III - Viscous Damping Walls A.M. Reinhorn and C. Li 1995 University at Buffalo 252 PB96-176409 20 This is the third report in a series of NCEER technical reports that examine the capabilities and limitations of passive energy dissipation systems. Comparative studies have been carried out based on analyses and experimental studies using a 1/3 scale reinforced concrete frame. The first report in the series, NCEER-95-0001, focused on fluid damping devices (QUAKELINE record 9600054); the second report, NCEER-95-0009, investigated friction devices (QUAKELINE record 9600051). This report presents an evaluation of viscous damping walls used as additional braces in welded steel or reinforced concrete frame structures. A mathematical model is suggested for the damping walls using information of properties from empirical relations and a structural analysis platform was adjusted to allow for comprehensive time history analyses of buildings. An evaluation of efficiency of the dampers using a simplified pushover analysis method was performed and is suggested as an alternative method for the prediction of structural behavior and design. (Adapted from the authors' abstract). Supplemental damping. Viscous damping walls. Shaking table tests. Added damping devices. Mathematical models. Pushover analysis. Retrofitting techniques. Inelastic response analysis.