(1 湖南科技大学土木工程学院，湘潭 411201； 2 湖南大学土木工程学院，长沙  410082)

［摘要］基于尺寸比为1.5∶1∶1(长∶宽∶高)的低矮房屋的风洞试验数据，分析了9类不同坡角的低矮房屋在5个不同风向的风场环境下，迎风屋面屋檐、屋脊等局部区域测点的平均、脉动及峰值风压系数。通过对比低矮房屋在不同坡角、不同风向作用下屋面的风压变化规律，总结了坡角及风向对低矮房屋屋面局部风压的影响规律。结果表明，低矮房屋在45°风向(坡角为0°)时，迎风屋面屋檐测点的风压最大，而背风屋面靠近屋脊的局部区域的风压随坡角的增大而增加。为今后改进低矮房屋的设计提供了依据。

［关键词］低矮房屋；局部风压；风压系数；风洞试验

中图分类号：TU375.4文献标识码：A文章编号：1002-848X(2011)06-0103-07

Wind pressures around the windward roof edges on low-rise buildings

Dai Yimin^{1, 2}, Li Qiusheng²(1 College of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;2 College of Civil Engineering, Hunan University, Changsha 410082, China)

Abstract:Based on the wind tunnel test of 9 kinds of low-rise buildings with different roof pitch model at a geometric scale of 1.5∶1∶1(L∶B∶H),  the characteristics of mean, fluctuating and peak pressures coefficients of the eaves and the ridge of  the windward roof  at  5 wind azimuths were investigated, and the area-averaged pressure coefficients were summarized. Through comparison with the available wind tunnel test data, it is found that the high wind pressure zones occurred around the windward roof edges at a wind azimuth of 45°, and wind pressure along the roof corner just behind the roof ridge at the windward end of the roof raised with the increase of the slope pitch. It is expected that the results should be references for wind-resistance design of low-rise buildings.

Keywords:low-rise building; local wind pressure; wind pressure coefficient; wind tunnel test

*湖南省优秀青年骨干教师资金资助（湘教通（2009）391号）。

作者简介：戴益民，博士，副教授，Email:dymzzy@163.com。

参考文献

［1］  SPARKS P R, SCHI S D, REINHOLD T A. Wind damage to envelopes of houses and consequent insurance losses ［J］. Journal of Wind Engineering and Industrial Aerodynamics,1994，53(9):145-155.

［2］  MINOR J E, MEHTAOOK K C. Wind damage observations and imlications ［J］. Journal of Structural Division，ASCE, 1979,41(11)：2279-2291.

［3］  MEHTA K C. Wind induced damage observations and their implications for design practice ［J］. Journal of Structural Engineering，ASCE，1990,33(6)：242-247.

［4］  UEMATSU Y, MIYOSHI T. Wind damage to cladding of residential houses due to typhoon in the Tohoku District, Japan, Tohoku［J］. Journal of Natural Disaster Sci.，1998, 42(7)：32-34.

［5］  UEMATSU Y, ISYUMOV N. Wind pressures acting on low rise buildings［J］. Journal of Wind Engineering and Industrial Aerodynamics，1999, 82(5)：1-25.

［6］  MEHTA K C, LEVITAN M L. Roof corner pressures measured in the field on a low building［J］. Journal of Wind Engineering and Industrial Aerodynamics，1992，41-44(10)：181-192.

［7］  戴益民,李秋胜,李正农. 低矮房屋屋面风压的实测研究［J］. 土木工程学报, 2008, 41(6):9-15.

［8］  戴益民,李正农,李秋胜. 低矮房屋的风载特性——近地风剖面变化规律的研究 ［J］. 土木工程学报, 2009, 3(42):44-51.

［9］  李秋胜,戴益民,李正农. 强台风“黑格比”登陆过程的近地风场特性［J］. 建筑结构学报,2010,31(4):55-62.

［10］  李秋胜,戴益民,李正农. 强台风“黑格比”作用下低矮房屋的风压特性［J］. 建筑结构学报,2010,31(4): 62-69.

［11］  戴益民,李秋胜,李正农. 低矮房屋屋面风压的实测及分析［J］.建筑结构，2009,39(7):88-91.