Numerical Simulation of Wind Loading Shape Coefficient on Gable Roof with Cornice

Abstract

Abstract: Based on Reynolds-averaged Navier-Stokes equations and the Spalart-Allmaras turbulence model, the wind pressure distribution and wind-loading shape coefficients on gable roof of low-rise buildings with cornices were studied by using stabilized fluid finite element method. The effects of some key parameters, such as length and height of cornices and roof pitch, on wind pressure distribution upon gable roof and the flow around low-rise buildings were analyzed. The result shows that wind loading shape coefficient on the roof is remarkably affected by vertical cornices, but slightly affected by horizontal cornices which are under strong minus wind pressure environment. Furthermore, the cornices with both vertical and horizontal sections greatly change the wind pressure distribution on the roof.

Key words: stabilized finite element method, Spalart-Allmaras turbulence model, gable roof, wind loading shape coefficient

CLC Number:

TU Jia-Huang, ZHOU Dai, LI Jun-Long. Numerical Simulation of Wind Loading Shape Coefficient on Gable Roof with Cornice[J]. Journal of Shanghai Jiaotong University, 2012, 46(01): 119-125.

References

［1］Stathopoulos T, Luehina H. Windinduced forces on eaves of low buildings［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1994, 52(2): 249261.

［2］顾明, 黄强, 黄鹏, 等. 低层双坡房屋屋面平均风压影响因素的数值模拟研究［J］. 建筑结构学报, 2009, 30(5): 205211.

GU Ming, HUANG Qiang, HUANG Peng, et al. Numerical smi ulation of effects of roof factors on mean wind pressure on gableroofed lowrise buildingswith eaves ［J］. Journal of Building Structure, 2009, 30(5): 205211.

［3］李华峰, 马骏, 周岱, 等. 空间结构风场风载的数值模拟［J］. 上海交通大学学报, 2006, 40(12): 21122117.

LI Huafeng, MA Jun, ZHOU Dai, et al. The numerical simulation for the wind fields and wind loads around spatial structures ［J］. Journal of Shanghai Jiaotong University, 2006, 40(12): 21122117.

［4］Del Coz Díaz J J, García Nieto P J, González Pérez J A, et al. Numerical analysis of the pressure field on curved and open selfweighted metallic roofs due to the wind effect by the finite volume method［J］. Applied Mathematics and Computation, 2009, 209(1): 3141.

［5］Spalart P R, Allmaras S R. A oneequation turbulence model for aerodynamic flows ［J］. AIAA Paper, 1992, 92: 0439.122.

［6］Bao Y, Zhou D, Huang C, et al. Numerical prediction of aerodynamic characteristics of prismatic cylinder by finite element method with SpalartAllmaras turbulence model［J］.Computers and Structures, 2011, 89(3/4): 325338.

［7］Chorin A J. A numerical method for solving incompressible viscous problems ［J］. Journal of Computational Physics, 1967, 2(5): 1226.

［8］Brooks A N, Hughes T J R. Streamline upwind/PetrovGalerkin formulations for convective dominated flows with particular emphasis on the incompressible NavierStokes equations ［J］. Computer Methods in Applied Mechanics and Engineering, 1982, 32(5): 199259.

［9］Lee B E. The effect of turbulence on the surface pressure field of a square prism ［J］. Journal of Fluid Mechanics, 1975, 69(3): 263282.

［10］Norberg C. Flow around rectangular cylinders: Pressure forces and wake frequencies ［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1993, 49(1/3): 187196.

［11］Murakami S, Mochida A. On turbulent vortex shedding flow past 2D square cylinder predicted by CFD ［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1995, 55(2): 191211.

［12］黄本才. 结构抗风分析原理及应用［M］.2版. 上海: 同济大学出版社, 2008: 2531.

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