Study On The Pressure Distribution Of Long-span Hyperbolic Roofs Under The Combined Action Of Wind And Rain

Large-span hyperbolic roof shape is complex,with light weight,flexible,low damping characteristics,wind load is the control load.Usually under the action of strong winds with heavy rains;affected by the wind,the rain landed in addition to its own gravity,also influenced by wind speed,lead to precipitation and rainfall pressure load increasing on the surface of the building.Under the joint action of wind and rain the effect of construction is different from in the wind or rain,the pressure distribution under the joint action of wind and rain in the specification to make specific provision at home and abroad,thus carrying out the surface pressure distribution of structures under the joint action of wind and rain is a very meaningful work.In this paper,relying on Fluent14.5 computing platform,to use the numerical simulation method,to study the average pressure distribution on the surface of the large-span hyperbolic roof under the joint action of wind and rain,the main work is as follows:1?Using the Euler-Euler method,studying average pressure coefficient of the square?rectangle? round? oval hyperbolic roof surface structure under the joint action of wind and rain,and compared with measured wind alone experiment data,obtaining under the joint action of wind and rain the surface pressure distribution of different shaped roof is different from that of individual wind load;Through comparing the coefficient of average pressure of the different shapes of hyperbolic roof surface,to get the pressure distribution of the surface of the different hyperbolic roof and the most unfavorable hyperbolic roof projection shape.2?researching parameters: the distribution of average pressure coefficient of the square?rectangle?round ?oval hyperbolic roof surface structure under different wind speed,wind direction and rainfall intensity,obtaining the most adverse wind speed,wind Angle and rainfall intensity;according to the corresponding specification to partition of four kinds of hyperbolic roof,in the most unfavorable wind speed,rainfall intensity and direction Angle of the numerical simulation,to get the average pressure coefficient values of each partition.