Host: Science Council of Japan
Co-host: Architectural Institute of Japan, Japan Association for Wind Engineering, The Institute of Electrical Engineering of Japan, Japanese Society of Steel Construction, Japanese Society of Civil Engineering, Meteorological Society of Japan
Pages 000007
The dynamic characteristics of structures are often evaluated by measuring their vibrations. This is done to investigate wind vibrations of high-rise buildings or for other purposes. However, few vibration evaluations have focused on changes in the structural properties of buildings or on the rigidity of main structures and non-structural walls during construction. This paper describes changes of the dynamic characteristics of a high-rise steel chimney before and after setting a TMD during ambient conditions and strong wind. The damping ratios obtained by RD technique and FDD increase from 0.57% to 1.34% and from 0.71% to 1.45% after installing TMD, respectively. The damping ratio for ambient vibration is about 0.2% and is smaller than that during strong wind. This difference is caused from the difference of the amplitude of the acceleration between ambient response and wind-induced response.
