Experimental Study And Numerical Simulation On Wind Pressure Of Large Railway Station Canopy

At present,in our country,the wind pressure coefficients of complex architecture are usually determined by the wind tunnel test.Most of the researches on the CFD numerial simulation focus on gymnasium and high buildings.but there are only a few researches on the large canopy.This thesis is based on the research of wind pressure coefficients of Bei Daihe railway station canopy.and in the thesis,two methods (wind tunnel test and CFD numerial simulation) are combined together to find out the the wind pressure of the canopy. First,the wind pressure coefficients of canopy will be worked out through the wind tunnel test.Then calculate the wind pressure coefficients by the CFD software (FLUENT).Comparing the result of wind tunnel test with the result of CFD,we can prove that CFD numerical simulation method is precise and reliable.At last,use CFD method to work out the wind pressure coefficients of canopy in 4 different projects.and compare their results.It can prove that setting skylights on conapy can strenghten its ability of resisting the wind.The location and ventilation rate of the skylights will have a great influence on the wind field.The setting of Wind break wall is also benefit for the canopy's ability of resisting the wind.The wind break wall mostly influences the wind pressure coefficients of the below surface of the canopy, and this leads to the influence on the upper surface of the canopy indirectly.All of the problems mentioned above should be given a great attention by the scientific researchers and designers.