低层坡屋面群体建筑表面风压的数值模拟  

NUMERICAL SIMULATION OF WIND PRESSURES ON A LOW-RISE BUILDING COMPLEX WITH GABLE ROOFS

作　　者：王辉[1] 陈水福[1] 唐锦春[1] 

机构地区：[1]浙江大学土木系,浙江杭州310027

出　　处：《工程力学》2003年第6期135-140,64,共7页Engineering Mechanics

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,基于Reynolds时均N-S方程,采用由标准k-e湍流模型扩展的RNG k-e模型,对一幢低层双坡屋面单体房屋和由六幢该类房屋组成的群体建筑的周围风场及表面风压进行了数值模拟。数值模拟采用具有良好适应性的四面体单元进行计算区域的网格划分,顶点中心格式的有限容积法进行控制微分方程的离散,SIMPLE压力校正迭代算法实现对非线性离散化方程的求解。在单体计算结果和风洞试验结果有较好吻合的前提下,重点获得了群体效应下低层双坡屋面房屋表面风压的分布规律和特征。Numerical simulation was carried out to predict wind-induced pressures on a low-rise single house with gable roofs and a building complex consisting of six low-rise houses with gable roofs. The simulation was based on Reynolds-averaged N-S equations and the RNG k-ε turbulence model, which is extended from the standard k-εturbulence model. Tetrahedral elements with good adaptability were employed to divide the computational domain. The finite-volume method with non-staggered cell-vertex scheme was used to discretize the governing differential equations and the SIMPLE pressure correction iteration algorithm was adopted to solve the resultant nonlinear equations. Good agreement was reached between the computed results and wind-tunnel test results of the single gable-roof house. The behavior of wind pressures on the surface of low-rise building complex with gable roofs was discussed.

关 键 词：建筑风场 表面风压 数值模拟 低层房屋 房屋群体 

分 类 号：TU312.1[建筑科学—结构工程] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]