不同大小和高度建筑物下突风荷载试验研究

Q4 Energy

Journal of Wind Engineering Pub Date : 2021-01-31 DOI:10.5359/jwe.46.12

Yumi Iida, Kazunori Asano, Y. Uematsu

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引用次数: 0

摘要

下突风场的风场特征与湍流边界层的风场特征明显不同。这种非平稳性，特别是由强烈的移动下沉气流和靠近地面的强发散流出引起的非平稳性，对建筑物造成严重的破坏。本文利用自行研制的运动射流模拟器对脉冲射流、运动射流和脉冲运动射流三种射流进行了实验，研究了下爆的特性及其对建筑物的影响。讨论了下爆的非平稳性对作用在三种不同大小和六种不同高度建筑物上的风压和力的影响。最后，根据试验结果，提出了建筑物下突风荷载的评估方法。

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Experimental Study of Downburst-induced Wind Loading on Buildings with Different Sizes and Heights

The wind characteristics of downbursts are significantly different from those of turbulent boundary layers. The nonstationarity, especially caused by a severe moving downdraft and strong divergent outflow near the ground, causes serious damage to buildings. The present paper investigates the characteristics of downbursts and its effects on buildings, based on an experiment with three kinds of jets, i.e., a pulsed jet, a moving jet and a pulsed moving jet, using a moving jet simulator that we have developed. The effects of non-stationarity of downbursts on the wind pressures and forces acting on buildings with three different sizes and six different heights are discussed. Finally, an evaluation method of downburst-induced wind loads on buildings is proposed based on the experimental results.

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来源期刊

Journal of Wind Engineering Energy-Renewable Energy, Sustainability and the Environment

CiteScore

0.50

自引率

0.00%

发文量

期刊介绍： Earth Sciences and Astronomy Agriculture and Food Sciences Engineering in General Architecture and Civil Engineering Mechanical Engineering Interdisciplinary Sciences