(同济大学土木工程防灾国家重点实验室，上海 200092)

［摘要］基于空气相和雪相的关系为单向耦合的假设，采用了两相流理论模拟了风作用下雪的漂移过程。对通用流体软件FLUENT进行了二次开发，计算了在风作用下积雪发生迁移后屋盖表面的雪压分布，并对雪荷载改变量以及雪压分布的规律进行了分析，为结构设计提供了依据。

［关键词］大跨度屋盖结构；CFD；两相流；雪漂；雪荷载

Study on snow loads on the roof of Beijing south station

Li Xuefeng, Zhou Xuanyi, Gu Ming

(State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract:Snow drifting in wind is considered as a twophase flow. The mixture of air and snow is assumed to be oneway coupled so that the air phase can be treated as unaffected by the airborne snow. The numerical simulation employs the commercial CFD software, FLUENT, with additional user C code added to model snow drift. The regularity of the redistribution of snow loads on the roof of Beijing south station is discussed, which provides a basis for design of structure.

Keywords:large-span roof; CFD; tow-phase flow; snow drifting; snow load

*国家自然科学基金创新研究群体科学基金(50621062)，国家自然科学基金(50608060)，同济大学青年优秀人才培养行动计划联合资助。