摘要
运用计算流体动力学(CFD)方法进行了屋盖表面风荷载数值模拟,并与风洞试验结果进行了对比。在此基础上对加设女儿墙后的屋盖进行了CFD建模与计算,结果显示加设女儿墙可有效降低屋盖悬挑部分的最大风压和弯矩,并使屋盖上表面风压均匀化,可改善屋盖结构的受力状态。
Computational Fluid Dynamics （CFD） method is carried out to simulate wind loads acting on the plate cantilevered roof. Comparisons between the results from the present computation and the wind tunnel test were performed, which indicate that the precision of CFD numerical simulation technique is enough to predict the mean wind pressure distribution on complex cantilevered roof for practical purpose. Based on this, adding a parapet on the upper surface of the roof is made and further CFD numerical simulations is performed. The numerical results show that the maximum wind pressure coefficient and the moment of flexure on the windward roof areas can be reduced evidently by the parapet and the stress of the whole roof gets more even. Therefore, the stress state of the cantilever is improved and the roof structure will be more reasonable and economical.
出处
《低温建筑技术》
2006年第4期70-72,共3页
Low Temperature Architecture Technology
关键词
大跨屋盖
悬挑结构
减风措施
女儿墙
CFD
风压
long- span roof
cantilevered structure
wind load mitigation
parapet
CFD
wind pressure
