Study On Wind Pressure Characteristics Of Low Rise Buildings With Corner Openings

In most of the Southeast coastal area of China's construction for low-rise buildings,wind loading is one of the low building control loads.Buildings damaged in the storm the worst,the main form of damage is roof corner edge of the partly damaged in the wind,so the study of local damage of wind pressure distribution on low-rise housing,to improve the low wind-resistant design of the building is of great theoretical significance and practical value.This article based on the computation hydrodynamics(CFD)principle,uses the value simulation method research angle department to open the hole low house the wind pressure characteristic.First take the related wind tunnel experiment as the foundation,the contrast value analogue result,the confirmation value simulation method accuracy.Then studied the different angle department to open when the hole form the low house construction used the different roofing structure parapet wall form,under the different wind angle,the different wind speed external pressure,the intrinsic pressure and only presses the distribution.Finally the opposite angle department opens the hole low house the elegance interference effect to conduct the research,studied the angle department to open the hole low house existed when periphery executes harasses the building the wind pressure coefficient distributed characteristic.And contrasted under the most disadvantageous operating mode to use the different rapids model the wind pressure distributed result.In this paper,we can get some conclusions include:(1)Because the corner of the roof area is the weakest part of the whole house,so for housing in a low parapet can significantly reduce the wind pressure coefficient,corner higher parapet is better than that of continuous high parapet.(2)The cover corners housing of the hole in the form of damage to the destruction of the triangle form over the hole damage rectangle forms,the most adverse wind direction angle is 45° and60°.(3)The corner with interference under the effect of low rise buildings in raised corner parapet,good wind resistance and failure form of dangerous triangle hole.In the presence of the disturbance,the characteristics of the wind change from attraction to pressure.And the existence of "shielding effect" is put forward,that is,static interference between buildings in downwind environment.(4)The three turbulence models namely standard turbulence model,the RNG turbulent model and can realize the turbulence model,get the RNG turbulent model calculation accuracy is high,the residual error convergence is fast.