Numerical Simulation Of Snow Distribution On Multi-span Gable Roofs

In recent years,there have been many cases of building damage and collapse caused by snow disasters,which had a great impact on people’s daily life.The unbalanced distribution of snow on the roof is one of the main reasons for the damage to the roof structure.Multi-span gable roofs are usually used in all kinds of factories,greenhouses,warehouses and other buildings.This kind of roof is very sensitive to snow load and is common in all kinds of snow-related collapse cases.Therefore,the correct prediction of the snow distribution on this kind of roof area has great significance.At present,there are few researches on the snow distribution on multi-span gable roofs.Hence,this paper mainly uses the numerical simulation of wind and snow movement to study the snow distribution characteristics on multi-span gable roofs.The main contents of this paper are as follows:Firstly,the numerical simulation method based on the non-equilibrium mixture models is introduced,and the feasibility and accuracy of the method are verified by combined wind and snow tests,which lays the foundation for the research on the snow distribution on multi-span gable roofs.The snow distribution on multi-span gable roofs under different external inflow wind and snow fields is studied by numerical simulation,including the simulation analysis of wind speed,wind direction angle,snow particle density and snowfall intensity.This paper summarizes the snow distribution characteristics on multi-span gable roofs under different natural snowfall environments.The numerical simulation of snow distribution on multi-span gable roofs under different roof shape conditions is carried out,including the numerical system analysis of roof span,windward width,slope and the influence of snow sliding effect on snow distribution on multi-span gable roofs is discussed.At the same time,the snow distribution on multi-span gable roofs and multi-span arch roofs is compared and analyzed to explore the rationality of normalization,and suggestions are provided for revision of Chinese codes based on the results of numerical simulation.