SEISMIC RESPONSE OF STRUCTURE USING TUNED MASS DAMPER

Abstract

This project illustrates the effect of passive tuned mass damper (PTMD) on multistorey framed structure through various parametric studies that include modification of design parameters of PTMD namely, mass ratio and damping ratio. The effect of increase in number of PTMD on the seismic response of the structure is also demonstrated. A comparative study is adopted to determine the effectiveness of PTMD between a low-rise and a high-rise building through percentage reduction in the seismic responses with the change in the position of PTMD. OPENSEES, serving as an effective tool to perform seismic simulation for all types of structures due to its faster processing speed and accurate results, is used here to perform the designing operations and generating the dynamic responses in the form of storey displacement and acceleration. The results asserted that the increase in mass ratio and the damping ratio of the PTMD helps in suppressing the seismic vibration to the building. The number of PTMDs on the structure also helps in mitigating the effect of vibration caused due to earthquake. Also, for a high rise building, the variation in responses is more if we shift PTMD along the height of the building as compared to a low-rise building. The application of six different earthquakes of different intensity on the structure, further justified the efficacy of PTMD in reducing the responses of the structure.