含檐口双坡屋面风压风载的数值模拟  

Numerical Simulation of Wind Loading Shape Coefficient on Gable Roof with Cornice

作　　者：涂佳黄[1] 周岱[1] 李俊龙[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《上海交通大学学报》2012年第1期119-125,共7页Journal of Shanghai Jiaotong University

基　　金：上海市基础研究重点项目(10JC1407900);国家自然科学基金项目(51078230;11172174)

摘　　要：基于雷诺时均N-S方程和Spalart-Allmaras湍流模型,运用稳定化流体有限元法数值模拟含檐口双坡低矮屋面的风压分布和风载体型系数,分析了檐口的竖向高度和外伸长度及屋面坡度等关键参数对屋面风载体型系数和周围流场的影响.结果表明:檐口竖向高度对屋面风压分布和风载体型系数的影响较大;水平外伸檐口自身承受的吸力较大,而其长度对屋面风载体型系数影响较小;同时设置竖向和水平檐口时,对屋面风载体型系数的影响明显.Based on Reynolds-averaged Navier-Stokes equations and the Spalart-Allmaras turbulence model,the wind pressure distribution and wind-loading shape coefficients on gable roof of low-rise buildings with cornices were studied by using stabilized fluid finite element method.The effects of some key parameters,such as length and height of cornices and roof pitch,on wind pressure distribution upon gable roof and the flow around low-rise buildings were analyzed.The result shows that wind loading shape coefficient on the roof is remarkably affected by vertical cornices,but slightly affected by horizontal cornices which are under strong minus wind pressure environment.Furthermore,the cornices with both vertical and horizontal sections greatly change the wind pressure distribution on the roof.

关 键 词：稳定化流体有限元法 Spalart-Allmaras湍流模型 双坡屋面 风载体型系数 

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]