Field measurements and numerical simulations were adopted to research snowdrifts on low-rise buildings. Typical roofs including stepped flat roof, flat roof and pitched roof were considered. Snow load models on typical roofs were put forward, and the results showed that cs on stepped flat roof was similar to the existing results, cs on flat roof increased along the wind direction, presenting an inverted u-shaped distribution, and could be simplified to an uniform distribution. With the changing of wind speed, cs trended to the evolution of inverted "V", the adverse effect due to the linear inhomogeneous distribution should be considered. On pitched roof, the amount of snowdrift was less on the condition of weak wind weather, the adverse effect on the windward side was suggested to be considered. Snow load on the plat roof and the pitched roof both increased due to the existence of parapets, and the drift length on the windward side was much higher than that on the Leeward side. At last, a coupled CFD and DEM method was used to simulate snowdrift on typical stepped flat roof, considering collision and bonding of snow, and the simulation results had a good consistency with the existing field measurement.
赵雷1,余志祥1,2,齐欣1,赵世春1. 低矮建筑屋盖风雪流作用场地实测与数值模拟[J]. 振动与冲击, 2017, 36(22): 225-231.
ZHAO Lei1 YU Zhixiang1,2 QI Xin1 ZHAO Shichun1. Field measurements and numerical simulation of the snowdrift on low-rise buildings. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(22): 225-231.
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