STRUCTURAL RESPONSE CONTROL OF RCC MOMENT RESISTING FRAME USING FLUID VISCOUS DAMPERS

Frequent earthquakes round the globe and large no of structures vulnerable to it have necessitated the need for structural response control to gain pace in application around the globe. This paper discusses the use and effectiveness of one such device, fluid viscous dampers, for response control of structures and to reduce damping demand on structural system. In this paper a non-linear time history analysis has been carried out on a 3D model of a 12 story RCC MRF building using 3-directional synthetic accelerogram. Two different cases of building models with and without supplemental damping have been analyzed using ETABS. The story responses in terms of absolute maximum displacement and story drift have been compared. Time history response plots for the two models have also been compared for various responses viz. roof displacement and acceleration, base shear and story shear forces, along with the various energy components and damping behavior. The results of the time history analysis are in close conformation with previous investigations and represent the effectiveness of dampers in improving the structural response as well as damping demand on structural systems.