Comparative study on control plans against wind and earthquake for a high-rise building

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (4) : 223-229.

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Comparative study on control plans against wind and earthquake for a high-rise building

CHEN Xiao-bing1;CHEN Chang-qing2;ZHOU Yun1;WANG Da-yang1

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Abstract

Abstract: Vibration control of a 98.93m high-rise building in wind and earthquake is studied in this paper. Three vibration control schemes with nonlinear viscous dampers are proposed to control structural dynamic responses under wind and earthquake excitations according to natural characteristics of the building. Dampers are installed in stories from 21st to 26th in scheme 1, from 12th to 14th in scheme 2 and from 3rd to 4th in scheme 3. The dynamic responses of the structure with the proposed control schemes in wind and earthquake excitations are investigated and their vibration control effects are analyzed comparatively. The study results show that dynamic responses induced by wind and earthquake excitations can be controlled effectively by the proposed schemes. Control effect of scheme 2 is superior to both scheme 1 and scheme 3 and scheme 3 is the worst in wind and earthquake. The peak top acceleration and story displacement can be reduced by 43% and 44% respectively for scheme 2 in wind-induced vibration. The top story displacement can be reduced by almost 10% for scheme 1 and 2 in earthquake excitations. Dampers are suggested to be installed in middle and up stories so as to achieve maximum control effect for cases of controlling structural responses under both wind and earthquake excitations.

Key words

High-rise structure / viscous damper / vibration control / wind-induced vibration response / seismic response

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CHEN Xiao-bing;CHEN Chang-qing;ZHOU Yun;WANG Da-yang. Comparative study on control plans against wind and earthquake for a high-rise building[J]. Journal of Vibration and Shock, 2011, 30(4): 223-229