鉄塔支持型鋼製煙突の渦励振およびガスト応答に関する研究

概要

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The dynamic behaviors of a tower supported steel stack are not well known due to the lack of full scale observation data and wind tunnel tests. And the dynamic response analysis of the tower supported steel stack is not clear. This paper reports the long period field observation and wind tunnel test data of the tower supported steel stack on Kyushu district, and describes the relationship of both data. The methods are to observe the wind responses by using accelerometer and strain meter on the tower supported steel stack, and compare the field observation data with the correlation of y/d (y is an amplitude, d is a diameter of the stack) and Scruton number from the wind tunnel tests. The conclusions are as follows; 1) the real phenomenon is reproduced by the wind tunnel tests concerning the vortex-induced vibration, 2) the amplitude of both vortex-induced and gust responses of the stack gets smaller with its increase of damping ratio, 3) Scruton number is usable to control vortex-induced vibraiton concerning the dynamic design of the tower supported steel stack.
一般社団法人日本建築学会の論文
2004-03-20