Study On Surface Wind Pressure Distribution And Shape Optimization Of The Gable Roofs House With Plane Partially Protruding

The gable roofs camping house with partially protruding plane is a special tent used by our army for medical treatment,surgery,and treatment.Because of the overall lightness of the house,it is a typical wind-sensitive structure that wind load plays a role of controlling.The distribution of wind pressure on the surface of a building mainly depends on the geometric shape of the building,although domestic and foreign codes have give the wind load shape coefficient of Y-shaped planes,L-shaped planes,匚-shaped planes,ten-shaped planes and Truncated triangle plane for irregularly closed houses and structures on specific proportions of specific wind direction angles,the influence of enclosure structure and other components is also explained in detail.However,for the gable roofs houses with partially protruding plane(mainly consisting gable roofs house of ?-shaped plane and L-shaped with undefined ratio),there are no explicit regulations at home and abroad.The wind-resistant design can only approximate the double slopes.Designed for roofing houses.At the same time,studies on the body shape optimization have not been reported.Therefore,it have theoretical significance and engineering value to study the wind pressure distribution characteristics of the double-slope houses that are partially convex in the plane and the optimization of body shape based on the wind resistance design for structural wind resistance design and product development and utilization.In order to study the surface wind pressure distribution and reasonable building appearance of the gable roofs camping house with partially protruding plane,based on Computational Fluid Dynamics(CFD)and the basic principles of the atmospheric boundary layer,the computational fluid dynamics software Fluent was used to perform a large number of trials on the model,comparing the simulation results with the field measurement data of the TTU and establishing a reasonable and reliable numerical wind tunnel method.36 kinds of analysis models are designed according to the functional requirements of our camping houses,the scale of human body and the spatial scale required for the activities,and based on the wind direction angle,the layout of the building and the relative size of the auxiliary building,the distribution of wind pressure on the surface of the house under the 168 working conditions is analyzed and discussed,and the wind load figure coefficient suitable for the wind resistance design of this kind of building is also discussed.On the basis,the average wind pressure,standard deviation and extreme value of the surface of the house are used as the optimization objectives,and the reasonable building appearance with the smallest wind effect is selected to improve the structure’s own wind resistance performance.The results show that the auxiliary building projected from the gable roofs house will change the airflow around the building,the change of the distribution of wind pressure on the surface of the building cause the change of wind pressure on the structure surface,and it even causes the local of main building to change its shape the wind load coefficient,so it’s must to consider the impact of auxiliary buildings on the building surface wind pressure in the wind design.In the shape optimization,the numerical simulation of the analysis model using the average value of the wind pressure on the surface of the house,the standard deviation,and the extremum is performed to numerically simulate the analysis model,which can effectively select the reasonable architectural form of the house to improve the structure’s own wind resistance performance.