Energy assessment of friction damped two dimensional frame subjected to seismic load

Abstract

Energy based seismic analysis is expected to provide better idea for design and damage assessment of structure subjected to seismic load compared to displacement based analysis as former can take care of repeated plastic deformations. However, the approach based on energy concepts has not been explored in depth. At the same time, use of dampers in structures is also being investigated in order to protect the structures from adverse effects from earthquake. Herein, formulation for energy dissipated by friction damper and energy balance approach hasbeen established for friction damped medium and high-rise buildings. Also, it has been observed that friction dampers not only can reduce the input energy but also dissipate major part of the input energy.The effect of friction damper on kinetic energy and strain energy has also been studied.