Performance Evaluation of a Newly Developed Translational Tuned Mass Damper

A tuned mass damper (TMD) is a cost-effective tool for targeting the vibration mitigation of a particular mode of structures e.g. first mode of vibration. Structures like a tall building, large span bridges, and other slender structures tend to be easily excited to high amplitudes. In order to deal with the aforementioned issues, TMD could be a good option that can reduce extreme vibration very effectively. The main objective of this paper is to show the implementation of a newly developed TMD to reduce the amplitude of vibration for an excited structure. The TMD was designed such a way that its parameters such as spring stiffness, mass can be adjusted. By tuning the early mentioned parameters, its frequency also be changed to meet the requirements from the structure. In addition, this work investigates the effect of TMD by observing the dynamic response of a two-storey frame structure both experimentally and numerically. Finite element method has been used as a numerical tool to study the dynamic response of the steel frame-TMD system. The time-history (linear) analysis of the frame without (modal mass = 0%) and with TMD (modal mass = 5 and 15%) under earthquake load has carried out and the performances are evaluated and compared. It can be concluded that a significant reduction of response (i.e. displacement) is possible via the newly developed TMD. The maximum percentage of decrease in the displacement found to be reduced by 21% for the modal mass of 5% and 43% for the modal mass of 15%, respectively. Hence, it can be noted that newly developed TMD has potential to use in the real structure for vibration mitigation. 