Abstract
Among various types of Tuned Mass Dampers(TMDs) for the civil structures (such as tall buildings, slender towers and long bridges), dual-functional electromagnetic TMDs have received a lot of attentions due to its enhanced effectiveness in mitigating the vibration of the primary structures and harvest the energy at the same time. This paper quantitatively investigates the effectiveness of dual-functional electromagnetic TMDs to the building performance regarding to building safety, human comfort and energy harvesting when the primary structure is being disturbed by the wind excitation regularly and seismic excitation in an extreme situation. Six corresponding individual Performance Indexes (PIs) are defined and optimized using H_2 optimization criterion so as to determine the optimal parameters of dual-functional electromagnetic TMDs, resulting in the best performances of building safety, human comfort and energy harvesting respectively. Moreover, a combinational PI is defined and optimized to evaluate the overall effectiveness of dual-functional electromagnetic TMDs including the priority concerned Pis and the energy harvesting performance. A case study is then performed based on the parameters a real building to verify the effectiveness of the optimized dual-functional electromagnetic TMD. Simulation results of dual electromagnetic TMD are presented in comparison with classic TMD and without TMD case.
