In the design of industrial chimneys and towers, structural engineers must assume a level ofthe inherent damping in the structures. In order to better estimate the dynamic response of thosestructures, actual damping was measured from wind-induced vibration signals of chimneys and towers andits characteristics with respect to the response levels, the structural systems, and the wind direction werediscussed. Damping ratio and natural frequency for three chimneys and two towers were calculated usingrandom decrement technique.
Key Words
damping; frequency; field measurement; random decrement technique; chimneys and towers; wind-induced vibration.
Address
K.P. Cho and Y. Tamura, Department of Architectural Engineering, Tokyo Institute of Polytechnics, 1583, Iiyama, Atsugi, Kanagawa 243-0297, JapanT. Itoh, Architectural Design Department, Tokyo Electric Power Services Co., Iino Bldg. 1-1, Uchisaiwai-Cho 2-Chome, Chiyoda-Ku, Tokyo 100-0011, JapanM. Narikawa, Y. Uchikawa, I. Nishimura and Y. Ohshima, Architecture Group, Power Engineering R&D Center, Tokyo Electric Power Company4-1 Egasaki-Cho, Tsurumi-Ku, Yokohama 230, Japan
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