Experimental and Numerical Evaluation of Vibration Control Performance in Structures Equipped with TMD and PTMD Systems
摘要
The previous studies indicate that tuned mass dampers (TMDs) may show inefficacies in performance due to seismic (earthquake) applications. A particle mass damper (PMD) is one of the passive control technologies with an auxiliary mass damper composed of numerous small particles enclosed within a container that is attached to the vibrating structure. In this study, a particle tuned mass damper (PTMD) are proposed to address the practical shortcomings of conventional TMDs and to take advantage of the beneficial features of PMDs for seismic mitigation. Subsequently, a shaking table test was designed and conducted on SDOF structures equipped with a conventional TMD and the proposed PTMD in order to systematically compare their dynamic behavior and corresponding vibration reduction performance. The numerical model developed for the PTMD was also validated using MATLAB through comparison with the experimental results. Furthermore, the vibration control performance of structures equipped with TMD and PTMD was numerically investigated. In the numerical study, the benchmark models of a nine-story linear-elastic building and a twenty-story nonlinear building were analyzed in OpenSees under a set of seismic records, comprising two far-field and two near-field earthquakes arranged in three-record packs with varying frequency content selected to be effective for the chosen benchmark structures. The comparison of the structural dynamic responses demonstrates that the PTMD generally provides superior vibration control performance compared to the TMD under seismic loading. This superior performance was evident not only in elastic performance indices but also in nonlinear performance indices, such as the number and rotation of plastic hinges.