| Landing hipped camping house has advantages of folding conveniently,high recycling rate,high mobility and so on,so it is widely used in civilian and military fields.Low lighting landing hipped house is in the near earth region with great changes of wind speed and high turbulence intensity of the atmospheric boundary layer;and in view of the overall quality light of this kind structure,it belongs to wind sensitive structures.So wind load is often the control load in the structural design.Because of the building function,landing hipped camping house need to open the door and window.At this point of wind pressure distribution changed significantly,the internal and external load work together on the house.While the design code at home haven't given the shape coefficient and local wind pressure of landing hipped house.which leads to no foundation and some security risks,so it is necessary to study the windresistant design of this kind of building.The study is based on fluid dynamics and atmospheric boundary layer theory.Tunnel test of TTU model with local opening and FLUENT software are also used in order to discuss and analyze key techniques and parameters,such as mesh rezoning pattern turbulence models,discrete format and solving algorithms,which establishes numerical wind tunnel of landing hipped camping house with local opening.Taking the hole size hole location and hole pattern as parameters,the distribution of wind pressure on the surface of folding landing hipped house under 104 different conditions are calculated where the distribution regularity of flow field,wind pressure distribution characteristics can be obtained and the net wind load shape coefficient was obtained.It can be found from the results that the local opening have significant influences on the wind pressure.The most unfavorable windward side one side open hole,wind pressure coefficient of roof peak is-1.24,which should be paid more attention when it is designed and used. |
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