(浙江绿城建筑设计有限公司， 杭州 310007)

［摘要］选取TTU建筑现场实测和刚性模型风洞试验屋面风压数据作为比较标准，验证了CFD方法模拟低层大跨屋盖表面平均风压的可靠性，并讨论了湍流模型的选取对模拟结果的影响。在数值模拟中采用雷诺时均湍流模拟方法和RNG k-ε两方程湍流模型，结合缩尺模型风洞试验，研究了曲面大跨屋盖表面风压分布。比较了有无背景建筑和正面是否开洞等不同工况下，曲面大跨屋盖内、外压分布的异同点，为该类结构抗风设计提供了依据。

［关键词］大跨屋盖； 风荷载； CFD数值模拟； 风洞模型试验； 抗风设计 

中图分类号： TU312.1 文献标识码： A文章编号：  1002-848X(2016)S1-0974-07

Numerical simulation of mean wind load on long-span roof structure

Li Heng

(Zhejiang Greenton Architectural Design Co., Ltd., Hangzhou 310007, China)

Abstract: The reliability of computational fluid dynamics simulation of wind pressure on long-span roof structure was verified by comparison between the numerical simulation results, field measurement data and wind tunnel test results of TTU building. The accuracy of the simulation results by different turbulent models was studied. Based on the Reynolds Averaged Navier-Stokes method and RNG k-ε turbulent model, wind pressure distribution on a long-span roof with curved shape was calculated. The numerical simulation result is credible according to the wind tunnel test results of rigid model. Different characteristics of wind pressure distribution pattern on the curved roof are investigated in the presence or absence of cases of a back ground tall building and a front opening.

Keywords: long-span roof; wind load; computational fluid dynamics numerical simulation; wind tunnel test; wind-resistant design

作者简介: 李恒，硕士，一级注册结构工程师，Email:liheng@gad.com.cn。