均匀流中矩形高层建筑脉动风压的阻塞效应试验研究

PDF(5062 KB)

振动与冲击 ›› 2014, Vol. 33 ›› Issue (12) : 28-34.

论文

均匀流中矩形高层建筑脉动风压的阻塞效应试验研究

黄剑，顾明

作者信息 +

Experimental Investigation of Blockage Effects on Fluctuating Wind Pressure on Rectangular Tall Buildings in the Uniform Flow

HUANG Jian, GU Ming

Author information +

文章历史 +

摘要

对阻塞度为4.1%、6.1%、8.4%和10.1%的CAARC高层建筑标准模型在均匀风场中分别进行了测压试验，对比了各模型表面测点风压系数的根方差、功率谱、空间相关性和相干性，总结了矩形单体高层建筑脉动风压阻塞效应的主要规律，并从流场方面来解释。阻塞效应对模型绕流和尾流产生约束，改变了旋涡脱落形式，影响了建筑表面易产生分离、涡脱处的根方差脉动风压系数；建筑表面风压系数的功率谱、空间相关性和相干性也发生变化。

Abstract

Pressure measurement tests of CAARC standard tall buildings whose blockage ratios were 4.1%, 6.1%, 8.4% and 10.1% were respectively carried out in the uniform flow. Root-mean-square, power spectrum and spatial correlation and coherence of pressure coefficients on surfaces of each building were compared. The main phenomena of blockage effects of fluctuating pressures on single rectangular tall building were summarized and were interpreted by the flow. Blockage effects not only restrained the flow around and behind the building, changed the patterns of vortex shedding and influenced the root-mean-square of fluctuating pressure coefficients of locations where were prone to separation and vortex shedding, but also changed power spectrum, spatial correlation and coherence of the pressure coefficient on building surfaces.

导出引用

黄剑;顾明. 均匀流中矩形高层建筑脉动风压的阻塞效应试验研究[J]. 振动与冲击, 2014, 33(12): 28-34

HUANG Jian;GU Ming. Experimental Investigation of Blockage Effects on Fluctuating Wind Pressure on Rectangular Tall Buildings in the Uniform Flow[J]. Journal of Vibration and Shock, 2014, 33(12): 28-34