Wind-induced stochastic response of controlled tall buildings by complex-mode analysis |
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| Authors: | Sun Bing-nan Chen Shui-fu |
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| Institution: | (1) Dept. of Civil Engineering, Zhejiang University, 310027 Hangzhou, China |
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| Abstract: | This paper deals with the along-wind dynamic response of tall buildings passively controlled by Cross-Tensioned Spring Damper
(CTSD) mechanisms. In order to estimate the dynamic response more accurately and efficiently, the building and its CTSD controllers
were considered as a coupled non-classical damping system and a new stochastic response analysis method, complex-modal state-space
method, was proposed based on the combination of complex modes of the structural system rather than on the real-modal decomposition
as usual. As numerical examples, the displacement response of a 2-degree-of-freedom system to white-noise input is first considered
and the validity and accuracy of the proposed method are demonstrated through comparison with the exact results. The wind-induced
dynamic responses of a tall building controlled by two CTSD mechanisms are then analyzed. The calculation results showed that
the proposed method is much more appropriate and accurate than the conventional real-modal decomposition method in the analysis
of dynamic responses of passively controlled tall buildings.
Project (59478034) supported by National Natural Science Foundation of China (NSFC). |
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| Keywords: | tall buildings wind-induced vibration structural control complex-mode analysis state-space method |
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