大跨度屋盖风致积雪重分布的数值模拟  

Numerical simulation of wind-induced snow redistribution on large-span roof

作　　者：卢春玲[1,2,3] 陈锦焜 刘宇杰 LU Chunling;CHEN Jinkun;LIU Yujie(College of Civil and Architecture Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Rock-soil Mechanics and Engineering,Guilin 541004,China;Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学土木与建筑学院,桂林541004 [2]广西土力学与工程重点实验室,桂林541004 [3]桂林理工大学有色金属矿产勘查与资源高效利用协同创新中心,桂林541004

出　　处：《建筑结构》2021年第15期107-114,共8页Building Structure

基　　金：国家自然科学基金项目(51568015);广西创新驱动发展专项(桂科AA20302006)。

摘　　要：以吉林新火车站为研究对象,在流体计算软件FLUENT 6.3基础上编写相应的UDF后处理程序。基于Euler-Euler体系的两相流理论,采用FLUENT和UDF后处理程序对吉林新火车站周围的风雪运动进行了全尺度的数值模拟,得到了不同风速、风向下屋盖表面风致雪压的不均匀分布情况。结果表明:在风、雪作用后,屋盖以及雨棚上的雪压分布会发生改变,雪压分布非均匀;不同风向下,积雪分布系数的最大值集中在站台雨棚邻近主站房的区域;积雪漂移沉积效应主要受风速影响,风速较大的区域积雪的侵蚀越明显,在风速小的区域积雪沉积量也较大。Taking Jilin New Railway Station as the research object,the corresponding UDF post-processing program was compiled based on the fluid calculation software FLUENT 6.3.Based on the two-phase flow theory of Euler-Euler system,FLUENT and UDF post-processing programs were used to carry out a full-scale numerical simulation of the wind and snow movement around Jilin New Railway Station.The uneven distribution of wind-induced snow pressure on the roof surface with different wind speeds and wind directions was obtained.The results show that after the action of wind and snow,the snow pressure distribution on the roof and the canopy will change,and the snow pressure distribution will be non-uniform.Under different winds,the maximum value of the snow distribution coefficient is concentrated in the area of platform canopy near the main station building.Deposition effect of snow drift is mainly affected by wind speed.The erosion of snow in areas with higher wind speed is more obvious,and the amount of snow deposition in areas with lower wind speed is also larger.

关 键 词：大跨度屋盖 数值模拟 两相流理论 雪漂移 风致积雪分布 

分 类 号：TU312.1[建筑科学—结构工程]