开敞式拱形轻质屋盖风载体型系数研究

Study on Wind Load Type Coefficient of Open Type Arch Light Weight Building Roof

基于Reynolds时均方程与标准k-ε湍流模型,对在不同风向角时,开敞式拱形轻质屋盖风载体型系数进行了数值模拟与分析。通过与文献结果对比发现,数值计算结果和风洞试验吻合较好,说明该方法的适用性。研究发现:不同风向角对开敞式拱形屋盖上下表面风压极值的分布有较大影响,并且屋盖总体型系数会随着风向角增大而减小。因此,结构抗风设计,应结合实际风环境进行优化。

Base on the Reynolds - averaged equation and the standard k-ε turbulence model, under the different wind angles, the numerical simulation and analysis was conducted on the wind load shape coefficients of the opened - type arch light weight building roof. In the comparison with the references, the results showed that the numerical calculation results could be well fitted with the wind tunnel test and the method could be suitable. The study found that the different wind angles would have high influence to the wind pressure extreme value on the top and low surface of the open type arch building roof and the general coefficient of the building roof would be reduced with the wind angle increased. Therefore the structure wind resistance design should be optimized with the actual wind environment.