低矮带檐口曲面四坡建筑屋面风压数值模拟和抗风优化  

Numerical Simulation and Wind-resistant Optimization of Wind Pressure on Concave-roofed Low-rise Building with Eaves

作　　者：李俊龙[1] 周岱[1] 陈怡然[1] 季清[1] 马骏[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《上海交通大学学报》2013年第6期856-861,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51078230;11172174);上海市优秀学术带头人计划(13XD1402100)资助

摘　　要：采用Fluent软件与RNG(Re-normalization group)k-ε湍流模型,数值模拟我国东南沿海地区常见的一类带檐口低矮曲面四坡屋面的风压.重点分析了屋面坡角、风向角、檐口类型等参数对四坡屋面平均风压及周围风场的影响.研究表明,上述参数与屋面风压都密切相关.随屋面坡角增大,迎风屋檐处峰值风吸力减小,背风面风吸力增大;配置檐口可显著改变屋面子块区域的平均风压系数,从而使屋面抗风性能得到优化.Based on Fluent and Re- normalization group（RNG） κ-ε model, the wind pressure distribution around concave low-rise buildings with eaves in southeastern coastal areas of China was numerically inves- tigated. The influence of roof pitch, wind direction and cornice forms on the mean wind pressure over the roof and the wind around the building were mainly analyzed. The results show that the wind pressure over the roof is closely related to the parameters above. The wind pressure over the windward roof decreases while that over the leeward roof increases with the increase of roof pitch. Furthermore, the cornices can greatly change the average wind pressure coefficients of the sub-domains on roof, making it possible to optimize wind-resistant by using eaves on roofs.

关 键 词：低矮房屋 曲坡屋面 数值模拟 风压 抗风优化 

分 类 号：TU312.1[建筑科学—结构工程] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]