体育场主看台悬挑屋盖表面风压的数值模拟  

NUMERICAL SIMULATION OF WIND PRESSURES ON CANTILEVER GRANDSTAND ROOFS

作　　者：陈水福[1] 张学安[1] 金建明[1] 

机构地区：[1]浙江大学建筑工程学院,杭州310027

出　　处：《工程力学》2007年第6期98-103,共6页Engineering Mechanics

基　　金："十五"国家重点科技攻关计划项目;国家自然科学基金资助项目(59908010)

摘　　要：采用数值模拟方法对体育场主看台悬挑屋盖结构的表面风压分布进行了预测和分析。为验证数值模拟的准确性,首先对一具有风压风洞试验结果的主看台平屋盖结构进行了计算,计算结果与风洞试验结果作了比较。然后对浙江温州地区一主看台悬挑屋盖结构进行了数值模拟,考虑了屋盖倾角为0°和16°两种情况;通过对两个最不利风向角0°和180°的模拟结果的分析和比较,提出了这类屋盖表面风压的简化分布规律和计算方法,并与国外相关规范建议的公式作了比较。该简化计算方法可直接供同类结构抗风设计参考和应用。Numerical simulation has been carried out for the prediction of wind pressure distributions on cantilever grandstand roofs. In order to demonstrate the validity and accuracy of the numerical simulation technique, a flat grandstand roof with wind-tunnel test pressure results was first considered. The computed roof surface pressures were compared with the corresponding wind-tunnel test results and overall good agreement was reached. The wind pressure distribution on a real cantilevered grandstand roof located in Zhejiang Province of China was then examined. Two different cases with 0 °and 16° roof slopes were taken into account. Through analysis and comparison of the computed wind pressure results for the two most unfavorable wind directions, 0°and 180°, a simplified pressure distribution curve and the corresponding pressure determination method for this type of roof structures were proposed. The distribution curve was also compared with those recommended by relevant design codes. This simplified pressure determination method is directly applicable to practical wind resistant design of same type of cantilever roof structures.

关 键 词：风工程 主看台屋盖 悬挑屋盖 风压 数值模拟 

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]