Numerical Simulation Of Surface Wind Load On Low-rise Buildings

Typhoon's visit often cause severe damage or destroy to a mass of buildings especially the widely existing low-rise buildings. Therefore it is highly necessary to make clear the distribution law of wind pressures on such kind of buildings and accordingly find the corresponding wind-resisting means. With the development of computational hardware technology and the theory of computational fluid dynamic, the numerical stimulation techniques plays an important role in the wind engineering community by its unique merits. At the same time, it provides an effective way for the study of wind pressures of low-rise buildings. In this paper, the numerical simulation technique is employed to study the wind-induced pressure distribution on the roof of low-rise buildings and in the meantime, it is discussed that the impact of the wind pressure on the roofs under different building and geometry parameters. The research work of this paper is mainly focused on the following aspects: 1, The numerical stimulation of the TTU model. The flow fields under two typical inflow conditions, 60 degree and 90 degree, are simulated. Meanwhile the effects of some main factors on the precision of the simulated results are investigated individually through comparisons of the numerical results with the wind tunnel data obtained by other researchers. These factors includes the turbulence model, the differencing scheme, the boundary conditions and the discrete method of grid. 2, The numerical stimulation of the low-rise gable roofed building with eave. The obtained numerical results were compared with those of the wind tunnel test and the validity and accuracy of the numerical simulation were demonstrated. The distribution characteristics of the surface wind pressure on the roofs under different parameters such as grading angle, the length and height of overhang eaves were analyzed on the basis of numerical results.3, The numerical stimulation of cantilevered arc roofs of a long span stadium. The general characteristics and rules of wind load distributions on arc roofs of the stadium for different wind directions are systemically discussed by the numerical stimulation method. On the base of these, geometry parameters were considered by comparison between the modified model and the original model.