TWO-AXIS VIBRATION RESPONSE ATTENUATION OF BUILDING STRUCTURE USING ROLLING CYLINDER DYNAMIC VIBRATION ABSORBER

Abstract

This study proposes a novel two-axis dynamic vibration absorber designed to mitigate building vibrations in two axes of motion. The dynamic vibration absorber comprises two cylinders rolling along a circular curved track, each aligned orthogonally to reduce vibration responses along separate axes. Both absorbers are placed on the upper floor of the building and the natural frequencies of the cylinders are tuned to match the two lowest natural frequencies of the building’s bending modes. Several simulation studies in frequency and time domains are performed to evaluate the damper performance in reducing the building structural response under seismic excitation. The simulation data shows that the proposed dynamics vibration absorber can effectively reduce the seismic response of the building structure. Additionally, an experimental set-up is built and tested to validate the simulation outcomes. Experimental findings reveal a 70% reduction in structural vibration, with close agreement between empirical and simulation results, confirming the DVA’s efficacy.