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| Time - frequency Analysis of Dynamic Responses for Super - tall Buildings under Typhoons |
| GU Yuan-sheng，LI Chun-xiang，LI Jin-hua |
| Shanghai University, Shanghai 200072, China |
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Abstract Research purposes ： With the height and ratio increasing，material being low-weight and high-strength, structure system being complex，super - tall building always suffer acute swing under typhoons. So it is extraordinary importance to choose design parameters，forecast structure response，reinforce data of modal parameters，verify design veracity that time-frequency analysis of dynamic responses for super - tall buildings under typhoons.
Research conclusions ： By resorting to full-scale measurements of typhoon effects on a super-tall building，the dynamic characteristics of the super - tall building can be obtained with the measured data. Meanwhile，an evaluation may be carried out on the reliability of typhoon - induced responses. The time - frequency analysis methods of typhoon - induced responses of super -tall buildings mainly include the Fourier transform，wavelet transform，and Hilbert-Huang transform (HHT). This paper demonstrates 3 methods mentioned above in detail to summarize their advantages and disadvantages and to further prospect the trends of future researches in this domain.
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Received: 17 November 2007
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2008, Vol. 25 
