マスダンパーによる複数モード制振効果の実測評価 : 小振幅作動時における装置摩擦抵抗の影響評価

概要

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Control tower in Osaka international airport has been completed in early 2001 that utilized hybrid type mass damper system so as to control wind induced vibration in both sway and twist mode. After the installation of the device, in 2001 summer, structural response in structural controlling condition during a typhoon was observed. This typhoon did not strike just the airport, therefore, structural response was not so huge so that the operated motion of mass dampers was also much smaller than predicted normal operation. Of course the motion of device includes some nonlinear frictional resistant force, the smaller its motion is, the higher the mechanical loss of device is, and structural control performance is decreased compared to the case in which the device works in greater motion. Authors analyzed the observed data in statistical manner, and managed to evaluate the actual performance of the mass damper system appeared in sway and twist mode of the control tower. Furthermore, non-linear analysis was carried out and evaluate the structural control performance in another wind velocity condition precisely.
一般社団法人日本建築学会の論文
2003-03-20