目的确定大庆石油学院体育馆屋面的平均风压系数,为该工程的结构抗风设计提供荷载依据,探讨采用CFD数值模拟技术来确定复杂体形建筑物表面平均风压分布的可靠性.方法对大庆石油学院体育馆屋面风荷载进行刚性模型风洞试验研究,并基于Fluent6.1软件平台,采用雷诺应力湍流模型(RSM)对屋面的平均风压进行了数值模拟.结果通过风洞试验,得到了体育馆屋盖表面的平均风压系数,并分析了屋面的风压分布特性,得出了最不利风向角和分区体型系数.通过CFD数值模拟研究,探讨了各种参数变化对平均风压计算结果的影响,并将计算结果与风洞试验数据进行对比,两者吻合较好.结论CFD数值模拟技术作为一种新型的研究方法为研究建筑物表面的静态风压分布规律提供了一种较为简便、快捷、低成本的途径。可较准确地模拟实际大跨度屋盖表面的平均风荷载.将CFD技术用于工程方案阶段的预研是一种较为安全稳妥的思路.
Wind tunnel test and CFD numerical simulation of wind-induced loads have been performed on gymnasium roof of Daqing Petroleum Institute. Mean pressure coefficient on the roof is gained in the experiment, which can be referred to during wind-resistant design of the structure. The most unfavorable wind direction and block shape coefficient are determined by analyzing the behavior of wind pressure on the roof. Meanwhile, the wind load distribution on the roof is numerically simulated with Reynolds Stress Model (RSM)based upon Fluent6.1 soft platform. The influence of computing caused by some parameters is discussed. Compared with the wind tunnel test, the computational results have good agreement with experimental data. It indicates that the numerical simulation technique can predict the mean wind pressure distribution on the long-span roof for practical purpose.