建筑结构学报2012，Vol.33Issue(3)：118-125,8.
低层坡屋面房屋风荷载特性风洞试验研究
Wind tunnel test on wind load characteristic of low-rise sloping roof buildings
摘要
Abstract
Wind tunnel test on wind load characteristics of low-rise gable and hip roof buildings were presented, the mean wind pressure and fluctuating wind pressure coefficient of roof with different parameters, which include roof shape, wind attack angel, roof pitch and length of roof overhang, were analyzed. The results show that high suction is formed on eave and ridge of windward roof. The pressure coefficient on windward roof shows ring-form distribution feature when the roof pitch is 30° in 0° wind direction, which is vertical to the roof ridge, and stepped distribution feature when the roof pitch is 15~. Wind direction, roof pitch and roof shape show more influence on the shape coefficient of building. The shape coefficient of windward roof on gable roof model with 15~ roof pitch in 0° wind direction is 2.76 times more than that of 30° roof pitch. The shape coefficient of windward roof on hip roof with 15~ roof pitch in 0° wind direction is 2.28 times more than that of 30° roof pitch. The roof pitch doesn＇t affect the shape coefficient of leeward roof. When the gable roof is changed into hip roof with the same roof pitch as 15° or 30° in 0° and 45° wind directions, the absolute value of shape coefficient of windward roof is increased greatly and the windward roof becomes easier to be destroyed. However, there is little influence on leeward roof.关键词
双坡屋面/四坡屋面/风洞试验/体型系数/湍流模型/流体动力学Key words
gable roof/hip roof/wind tunnel tests/shape coefficient/turbulence model/fluid dynamics分类
建筑与水利引用本文复制引用
聂少锋,周绪红,石宇,勾朝伟,周天华..低层坡屋面房屋风荷载特性风洞试验研究[J].建筑结构学报,2012,33(3):118-125,8.基金项目
国家自然科学基金项目（50578013）,高等学校博士学科点专项科研基金项目（20050710004）,中央高校科研业务费专项基金项目（cHD2010Jc039）,长安大学基础研究支持计划专项基金. （）
