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The First International Conference on Building Energy and Environment

作者： Satoru Okamoto Department of Mathematics and Computer Science Shimane University

A series of wind tunnel tests was conducted on the vibration and scattering behavior of full-sized model of roof tiles, which were used widely for roofings of Japanese wooden dwellings. This study has investigated the nature and source of the vibrating and scattering behavior of roof tiles with the aim of providing a better insight to the mechanism. The roof tiles were set up on the pitched roof in the downstream of the flow from the wind tunnel. Based on the consideration on the results of the measurements, there is a basic mechanism which can lead to flow-induced vibrations of the roof tiles. This mechanism is similar to that of the so-called fluttering instability, which appears as the self-excited oscillation in the natural mode of the structure at the certain critical flow speed. The values of the frequencies for the oscillating relate to the values of natural frequencies of the vibration.

关键词： wind induced vibration vibration analysis Japanese slates

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wind-induced STOCHASTIC RESPONSE OF CONTROLLED TALL BUILDINGS BY COMPLEX-MODE ANALYSIS

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2000年第4期 64-69页

作者：孙炳楠陈水福

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.

关键词： tall buildings wind induced vibration structural control complex mode analysis state space meth?

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