[1]汤卓,王兆勇,卓士梅,等.雷暴冲击风作用下双坡屋面风压分布[J].东南大学学报(自然科学版),2014,44(1):168-172.[doi:10.3969/j.issn.1001-0505.2014.01.030]
 Tang Zhuo,Wang Zhaoyong,Zhuo Shimei,et al.Pressure distribution on gable roofs in thunderstorm downburst[J].Journal of Southeast University (Natural Science Edition),2014,44(1):168-172.[doi:10.3969/j.issn.1001-0505.2014.01.030]
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雷暴冲击风作用下双坡屋面风压分布()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第1期
页码:
168-172
栏目:
土木工程
出版日期:
2014-01-18

文章信息/Info

Title:
Pressure distribution on gable roofs in thunderstorm downburst
作者:
汤卓王兆勇卓士梅吕令毅
东南大学土木工程学院, 南京 210096
Author(s):
Tang Zhuo Wang Zhaoyong Zhuo Shimei Lü Lingyi
School of Civil Engineering, Southeast University, Nanjing 210096, China
关键词:
双坡屋面 雷暴冲击风 射流风洞 风压分布
Keywords:
gable roof thunderstorm downburst jet wind tunnel pressure distribution
分类号:
TU312
DOI:
10.3969/j.issn.1001-0505.2014.01.030
摘要:
为了研究雷暴冲击风作用下双坡屋面的风压分布,建造了用于建筑风工程的射流风洞,并对低矮建筑的双坡屋面进行了测压试验. 试验装置的气动测试表明,风场的风压分布和风速剖面与理论结果吻合良好,射流风洞可用于雷暴冲击风荷载的相关研究.然后,采用刚性模型的射流风洞测压试验研究双坡屋面的风压分布,为了使研究结果具有代表性,针对15°,30°和60°三种典型的屋面坡角制作刚性屋面模型,试验得到了模型在风场不同位置时的风压分布. 试验结果表明:建筑物位于雷暴冲击风场中心附近时,屋面风荷载为较大压力,较常规风荷载更为不利;建筑物远离风场中心时,3种屋面的雷暴冲击风荷载与常规风荷载比较接近.
Abstract:
A jet wind tunnel is constructed to generate a downburst-like flow for the purpose of quantifying downburst-induced aerodynamic loads on civil engineering structures. To study the pressure distribution on gable roofs, jet wind tunnel tests for rigid models of gable roofs are carried out. Velocity profiles and pressure distributions in a downburst are studied and good agreements are achieved between the present results and the data obtained from empirical models. Therefore, the jet wind tunnel can be used in wind engineering research. Then, the jet wind tunnel tests for rigid models are carried out to investigate the pressure distribution on gable roofs. In order to make the research representative, three typical roof pitches with the slope angles of 15°, 30° and 60° are used in making rigid models. Pressure distributions of the models in different locations of the wind field are obtained. The experimental results show that when the building is located in the center of the downburst, the wind loads on the gable roofs are pressure and more harmful than the conventional wind load. However, when the building is far away from the center of the downburst, the wind loads are close to the conventional wind load.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2013-06-18.
作者简介: 汤卓(1981—),男,博士,讲师;吕令毅(联系人),男,博士,教授,博士生导师,lylu@seu.edu.cn.
引用本文: 汤卓,王兆勇,卓士梅,等.雷暴冲击风作用下双坡屋面风压分布[J].东南大学学报:自然科学版,2014,44(1):168-172. [doi:10.3969/j.issn.1001-0505.2014.01.030]
更新日期/Last Update: 2014-01-20