突然开孔结构风致瞬态内压极值研究

余先锋1,段旻2,谢壮宁1

振动与冲击 ›› 2017, Vol. 36 ›› Issue (9) : 63-67.

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PDF(646 KB)
振动与冲击 ›› 2017, Vol. 36 ›› Issue (9) : 63-67.
论文

突然开孔结构风致瞬态内压极值研究

  • 余先锋1 ,段旻2 ,谢壮宁1
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Extreme value of wind-induced transient internal pressure of buildings suffering sudden opening

  • YU Xianfeng1,DUAN Min2,XIE Zhuangning1
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摘要

基于经典内压控制方程,对特定开孔时刻下的瞬态内压峰值响应进行了详细研究,分析了孔口开启时间对结构瞬态内压峰值的影响。提出了突然开孔结构瞬态内压极值的估算方法,并与精确算法进行了对比。结果表明:门窗开启时刻的外压值越大,瞬态内压峰值越大,但两者最大值之间存在着一定的时差;瞬态内压极值与外压达极值时的瞬态内压峰值之间的比值可用放大因子G=1.17来近似描述;文中提出的极值计算方法能有效地估算突然开孔结构瞬态内压极值。

Abstract

Peak values of wind-induced transient internal pressure response were studied in detail when a structure’s doors/windows suddenly were broken based on the classical governing equation of internal pressure.The effects of opening time on the peak transient internal pressure were analyzed.The estimated method for extreme value of transient internal pressure of buildings suffering sudden opening was presented,it was compared with the accurate calculation method.The results showed that the larger the external pressure when a building’s doors/windows suddenly open,the larger the peak value of the transient internal pressure; however,there is a time lag between the maximum external pressure and the peak transient internal pressure; an amplification factor (G=1.17) can be used to describe the ratio of the extreme value of transient internal pressure to the peak internal pressure response when the external pressure reaches its maximum value; the presented method can be effectively used to estimate the extreme value of transient internal pressure of a building suffering sudden opening.

关键词

过冲效应 / 瞬态内压 / 时差 / 放大因子 / 风洞试验

Key words

overshooting effect / transient internal pressure / time lag / amplification factor / wind tunnel test

引用本文

导出引用
余先锋1,段旻2,谢壮宁1. 突然开孔结构风致瞬态内压极值研究[J]. 振动与冲击, 2017, 36(9): 63-67
YU Xianfeng1,DUAN Min2,XIE Zhuangning1. Extreme value of wind-induced transient internal pressure of buildings suffering sudden opening[J]. Journal of Vibration and Shock, 2017, 36(9): 63-67

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