低层双坡屋面房屋表面风压的数值模拟  

Numerical simulation of wind pressures on low-rise building with gable roof

作　　者：王辉[1] 陈水福[1] 唐锦春[1] 

机构地区：[1]浙江大学土木工程学系,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2003年第6期634-638,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(59908010).

摘　　要：结合低层民房风荷载及抗风性能的研究,采用基于Reynolds时均方程和标准k-ε湍流模型的数值模拟方法,对一低层双坡屋面房屋的周围风场和表面风压进行了数值模拟.数值模拟采用具有良好拓扑性的四面体单元对计算区域进行网格划分,用顶点中心格式的有限容积法对控制微分方程进行离散,以解压力耦合方程的半隐式法(SIMPLE算法)实现对非线性离散化方程的求解.通过与风洞试验值的比较,表明了数值模拟能较好地反映低层房屋表面风压的分布,所得到的风压系数与风洞试验数据能很好地吻合.In combination with research on the wind load and wind-resistance behavior of low-rise buildings, the wind flow around, and the wind-induced pressures on, a low-rise building with gable roof were predicted using technique of numerical simulation based on the Reynolds-averaged equations, in which the standard k-Ε turbulence model was used. In the simulation, the computational domain was divided using adaptability tetrahedral elements. The finite-volume method with non-staggered cell-vertex scheme was used for numerical discretization of the governing differential equations; and the discretized nonlinear equations were solved using the semi-implicit method for pressure-linked equations (SIMPLE algorithm). By comparison with wind tunnel test results, it is confirmed that the numerical simulation fairly well predicts the wind pressure distribution on the building; and that the computed pressure coefficients agrees well with the wind tunnel test data.

关 键 词：低层双坡屋面房屋 表面风压 数值模拟 建筑风场 风荷载 

分 类 号：TU312.1[建筑科学—结构工程]