Seismic Response Reduction of Multistoried Building using Dampers

Abstract

Earthquakes are the most devastating natural hazards in terms life and property loss of any region. The response of the structure during earthquake greatly depends on the discontinuity in mass, stiffness and geometry of the structure. Mass irregularity is considered to exist where the seismic weight of any storey is more than 200 percent of that of its adjacent storey. This is introduced by increasing the weight of some floors relative to the other floors. The effect of irregularity depends on the structural model used, location of irregularity and analysis method Structural control is the one of the areas of current research aims to reduce structural vibrations during loading such as earthquakes and strong winds. In seismic structures upgrading, one of the lateral force reduction caused by the earthquake is use of dampers. Dampers are the energy dissipation devices which will reduce the vibrations and helps to reduce the buckling. In the present study a six storied RCC regular and mass irregular building were modelled. Modelling is done by using response spectrum analysis in ETABS 2016.By identifying the mass irregular building to be more prone to earthquake the building is provided with three different dampers(fluid viscous ,friction and visco elastic damper) at two different location(at corners on all stories, along all bays on all stories) .Then storey displacement ,base shear and time period values for the six models are compared to find out out the best damper.