某高层结构风振与地震反应控制设计方案的对比分析

陈小兵;陈常清;周 云;汪大洋

振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 223-229.

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PDF(3106 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 223-229.
论文

某高层结构风振与地震反应控制设计方案的对比分析

  • 陈小兵1;陈常清2;周 云1;汪大洋1
作者信息 +

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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摘要

摘 要:针对某98.93m高层结构自身特点设计了三种减振控制方案,即方案一将阻尼器布置在结构顶部21~26层;方案二将阻尼器布置在结构中部12~14层;方案三将阻尼器布置在结构下部3~4层,并以所模拟的脉动风荷载时程及所选地震波作为动力荷载输入,对结构进行各方案下的风振和地震反应控制对比分析。结果表明,各方案下风振与地震输入能量可得到不同程度的耗散而衰减结构的风振与地震反应。在结构的风振控制方面,方案二对结构顶层加速度和侧移的最大控制效果分别达43%和44%,其总体控制效果稍优于方案一,显著优于方案三;在结构的地震控制方面,方案一与方案二对结构顶层侧移的控制效果相当,均在10%左右,方案三控制效果最小。对同时考虑风振与地震反应的高层结构控制设计,建议尽量将减振装置设置在结构的中上部楼层,以最小的投入达到最大的控制效果。

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.

关键词

高层结构 / 粘滞阻尼器 / 振动控制 / 风振反应 / 地震反应

Key words

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

引用本文

导出引用
陈小兵;陈常清;周 云;汪大洋. 某高层结构风振与地震反应控制设计方案的对比分析[J]. 振动与冲击, 2011, 30(4): 223-229
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

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