The Study Of Wind Pressure Distribution On Hipped Folding Tabernacle With Local Opening

Folding tabernacle is more and more be favorred in the camping,rescue and relief,it has many characteristics,such as wind sensitive and material qualitative light.For the need of lighting,ventilation,and people in and out,it is indispensable to open holes on the surface of the building.For external wind pressure,houses open the internal gas space with holes.Building surfaces are not only affected by external pressure,but have a combination of inside and outside air pressure.The influence of building internal and external air pressure is particularly important for the main building structure design,specification only give double slope roof at home and abroad open type of shape coefficient,in this paper the research object in the wind resistant design for open hole under no reference basis,therefore need to wind resistance design of the building under the open hole.For the study of local open hole under light hipped pavilion building interior and exterior surface of wind pressure distribution,flow field characteristics and indoor comfort,this article is based on computational fluid dynamics and the basic principle of atmospheric boundary layer,large commercial use FLUENT software to TTU full scale model wind tunnel tests are simulated,and compared with TTU the scene measured data,and analyzed the turbulence model,meshing,velocity pressure coupling algorithm of numerical simulation of the split of the selection of parameters such as hole construction reliability;On this basis,the study of single and double wall open hole and roof with the wind flow to open hole,hole size and open hole location change of wind pressure distribution,internal and external surface is suitable for the similar construction wind load shape coefficient of wind resistance design,and analysis of single and double wall open hole and roof open hole affect indoor comfort.The results show that the open hole area increased and the rise of open hole position save pointed roof ridge of the roof surface and great influence of negative pressure peak coefficient;Single wall open hole,the hole is located in the windward side,the internal pressure coefficient increases sharply,the house is the probability of "wave" is higher,the mouth of the cave and wind flow to parallel,the internal pressure of suction,houses were the greatest possibility of "blow down",double wall open hole can effectively reduce the houses were "wave" of may;Roof open hole has improve on both sides of the lower central wind speed and reduce the effect of high wind speed,especially for the double wall under the open hole effect more apparent.