| In this thesis, the behavior of SMA incorporated friction dampers is studied through experiments. And the vibration control theory and control effectiveness of the dampers in long-span canopy roof structures are studied. Through the research, following achievements have been made:(1) A detailed experimented study has been carried out to investigate the performance of the SMA incorporated friction dampers.The effects of displacement amplitude and frequency are taken into account in experiments. Good agreement between theoretical and experimental results is obtained.(2) Based on theoretical and experimental study, the behavior of SMA incorporated friction dampers, friction dampers and SMA dampers are compared. It is shown that the SMA incorporated friction dampers possesse a significant performance of energy dissipation.(3) The SMA incorporated friction damper is applied to long-span canopy roof structures to investigate its vibration control performance.The control effectiveness is analyzed with inputting three-dimensional El-Centro earthquake waves in small, medium and large seismic intensity.The results show that control performance of the SMA incorporated friction damper is superior to that of both the friction damper and the SMA damper .(4) Parametric studies for control performance of the SMA incorporated friction dampers in long-span canopy roof structures are carried out. By analysis, practical engineering suggestions are presented.
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