施扰建筑高度对主建筑层阻力影响的试验研究

葛福,顾明

振动与冲击 ›› 2016, Vol. 35 ›› Issue (9) : 101-109.

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PDF(5927 KB)
振动与冲击 ›› 2016, Vol. 35 ›› Issue (9) : 101-109.
论文

施扰建筑高度对主建筑层阻力影响的试验研究

  • 葛福,顾明
作者信息 +

Experiment study of Impact of changes in the relative height of interfering building on main building layer drag force

  • GE Fu , GU Ming
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文章历史 +

摘要

利用刚性模型测压试验,研究了施扰建筑高度比变化对主建筑层阻力系数和层脉动阻力功率谱的影响规律。试验包含了3个并列位置,5个串列位置和3个斜列位置。分析结果表明,建筑物并列时,当间距比小于3.0时,高度比为1.3时的层平均阻力系数在某些层可能比高度比1.0时增大高达20%,层脉动阻力系数在高度比为1.3且间距比小于3.0时会略大于单体建筑,其余情况与单体建筑一致;建筑物串列时,高度比对层平均阻力系数影响主要体现在遮挡效应上,高度比越大,遮挡效应越严重,遮挡高度越大,层脉动阻力系数由于遮挡效应减弱涡脱以及施扰建筑增加来流湍流共同作用,影响规律复杂,层脉动阻力功率谱的影响规律也表明了高度比越大影响高度越大;斜列工况的结果,表明了并列间距比对干扰规律起控制作用。

Abstract

The impact of the changes in relative height of the interfering building on the main building layer drag force coefficients and drag force power spectrum is studied by rigid model pressure test. 3 side by side positions, 5 tandem positions and 3 oblique positions are considered. The results show that in side by side cases the interfering building has little impact on the layer drag force coefficients and the drag force power spectrum; In tandem cases, the height ratio impacts on the mean layer drag force coefficients is mainly reflected in the shielding effect, the greater the height ratio, the more serious the shielding effect and the higher the block height, the interference law of the RMS layer drag force coefficients is complex because of the combination of shilding effect and the increasing of flow turbulence, the interference law of drag force spectrum also shows that the block height of different height ratio is different; The results of three oblique cases show that across-wind spacing ratio plays a leading role in the interference law.

 

关键词

高层建筑 / 干扰效应 / 阻力 / 高度比 / 风洞试验

Key words

high-rise buildings / interference effect / drag force / relative height / wind tunnel test

引用本文

导出引用
葛福,顾明. 施扰建筑高度对主建筑层阻力影响的试验研究[J]. 振动与冲击, 2016, 35(9): 101-109
GE Fu,GU Ming . Experiment study of Impact of changes in the relative height of interfering building on main building layer drag force[J]. Journal of Vibration and Shock, 2016, 35(9): 101-109

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