In the design of industrial chimneys and towers, structural engineers must assume a level of<br />the inherent damping in the structures. In order to better estimate the dynamic response of those<br />structures, actual damping was measured from wind-induced vibration signals of chimneys and towers and<br />its characteristics with respect to the response levels, the structural systems, and the wind direction were<br />discussed. Damping ratio and natural frequency for three chimneys and two towers were calculated using<br />random 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, Japan<br />T. Itoh, Architectural Design Department, Tokyo Electric Power Services Co., Iino Bldg. 1-1, Uchisaiwai-Cho 2-Chome, Chiyoda-Ku, Tokyo 100-0011, Japan<br />M. Narikawa, Y. Uchikawa, I. Nishimura and Y. Ohshima, Architecture Group, Power Engineering R&D Center, Tokyo Electric Power Company<br />4-1 Egasaki-Cho, Tsurumi-Ku, Yokohama 230, Japan
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