PERFORMANCE OF DYNAMIC VIBRATION ABSORBERS ON BUILDINGS WITH COUPLED MODES

Abstract

<p>Dynamic absorbers, including the tuned mass damper (TMD) and the tuned liquid damper (TLD) , have been widely used in buildings to attenuate dynamic response. As the complexity of buildings increases, their response may become susceptible to torsional motion. The induced torsional motion can be suppressed by utilizing TMDs or TLDs. As such, the performance of different absorber arrangements are important for torsionally coupled structures. Also, a rapid design tool to reduce the computational effort for the design of the absorbers optimal parameters in torsionally coupled system is essential.</p> <p>In this study, the performance of different TMD/TLD configurations under both random and harmonic excitation are studied and evaluated. The effectiveness of the absorber configurations considered is accessed by the response reduction factor, which is defined as the ratio of the response of structure equipped with absorber(s) to the response of structure without absorber(s). Also, a preliminary design tool to determine optimal TMD parameters is developed by introducing the concept of a generalized structure-TMD system.</p>