Abstract: According to the damping effect of roof water tank and thermal insulation layer on the overall structure of a house, this paper establishes three kinds of TMD control devices for different roofs with lead rubber bearings, i.e. TMD for single water tank roof, TMD for double water tank roof and TMD for roof thermal insulation layer. The seismic reduction effect of those control devices is predicted and compared then by means of finite element analyses and dynamic time-history analyses as well. The compared results indicate that these three kinds of roof-TMD have obviously vibration-suppressing effect. As the quality ratio is within 3% the greater the mass is, the more homogeneous distribution of load is, the batter the vibration-suppressing effect will be. Among which the thermal-insulating roof-TMD is the best, the double tank-TMD becomes the second, and the single tank-TMD takes the worst. Our research findings may provide a theoretical basis for the follow-up study and design of TMD.

Key words: high-rise structure, passive energy dissipation, roof-TMD, dynamic response