Computing method about wind vibration response of extra-high buildings based on Wind-Gravity Coupling Effect

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (11) : 178-182.

LOU Wenjuan1 ZHONG Zhenyu1,2

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Abstract

Wind-Gravity Coupling Effect(WGCE) is a phenomenon that dynamic characters of tall and slender structure are changed by wind and gravity. In order to study mechanism of WGCE, the geometric nonlinear dynamic equation is concluded. The equation of load along wind can be divided into average wind equation and pulse wind equation. Pulse wind equation is a nonlinear equation whose parameters are relative to the displacement calculated from the average wind equation. Equivalent linear random vibration theory is used to solve the equation. The results show that gravity-rigidity ratio is an important factor to WGCE. Response variation of displacement，velocity , acceleration on the top of structure and moment ,shear at the bottom of structure increases with gravity-rigidity ratio while variation of shear at the bottom of structure does not change.

Key words

extra-high buildings / wind-gravity coupling effect(WGCE) / non-linear vibration；wind vibration;

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LOU Wenjuan1 ZHONG Zhenyu1,2 . Computing method about wind vibration response of extra-high buildings based on Wind-Gravity Coupling Effect[J]. Journal of Vibration and Shock, 2015, 34(11): 178-182

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