Comparative Study of Experimental and Standardized Pressure Coefficients for Industrial Roofs
DOI:
https://doi.org/10.14482/inde.39.2.725.4Keywords:
low structures, roofs, pressure coefficients, wind loadsAbstract
Every year, failures in the roofs of low buildings due to wind action occur. Some researchers believe that these losses could be caused by inadequacies in the regulations for buildings design under this type of loads. This article compares the pressure coefficients of roofs of various low buildings that have been tested, both in wind tunnels and by numerical methods (computational fluid modeling), by various researchers, with the coefficients result from applying the Eurocode EN1991- 1-4 on those structures. The purpose of this investigation is to identify possible discrepancias between the Eurocode EN1991-1-4 and the experimental tests, as a consequence of neglecting the variations in the intensity of turbulence and the roof slope in obtaining the pressure coefficients. From the analysis of results, it was found that the application of Eurocode EN1991-1-4 leads to an underestimation of the wind load in most of the roof, while in the corner corresponding to the leading edge of the wind, the load obtained is greater than that resulting from tests.
References
American Society of Civil Engineers, Minimum Design Loads for Buildings and Other Structures, 2010.
P. L. Fernández-Cabán and F. J. Masters, "Effects of freestream turbulence on the pressure acting on a low-rise building roof in the separated flow region," Frontiers in Built Environment, vol. 4, p. 17, 2018. https://doi.org/10.3389/fbuil.2018.00017
A. F. Akon and G. A. Kopp, "Mean pressure distributions and reattachment lengths for roof-separation bubbles on low-rise buildings," Journal of Wind Engineering and Industrial Aerodynamics, vol. 155, pp. 115-125, 2016. https://doi.org/10.1016/j.jweia.2016.05.008
M. Aldoum, "Wind Loads on Low-slope Roofs of Low-rise and Mid-rise Buildings with Large Plan Dimensions," Concordia University, 2018.
D. Prasad, T. Uliate, and M. R. Ahmed, "Wind loads on low-rise building models with different roof configurations," International Journal of Fluid Mechanics Research, vol. 36, no. 3, 2009. https://doi.org/10.1615/InterJFluidMechRes.v36.i3.30
F. Xing, D. Mohotti, and K. Chauhan, "Study on localised wind pressure development in gable roof buildings having different roof pitches with experiments, RANS and LES simulation models," Building and Environment, vol. 143, pp. 240-257, 2018. https://doi.org/10.1016/j.buildenv.2018.07.026
M. Atmaca, "Wind Tunnel Experiments and CFD Simulations for Gable-Roof Buildings with Different Roof Slopes," Acta Physica Polonica, A., vol. 135, no. 4, 2019. https://doi.org/10.12693/APhysPolA.135.690
R. Hoxey, A. Robertson, B. Basara, and B. Younis, "Geometric parameters that affect wind loads on low-rise buildings: full-scale and CFD experiments," Journal of Wind Engineering and Industrial Aerodynamics, vol. 50, pp. 243-252, 1993. https://doi.org/10.1016/0167-6105(93)90079-4
M. Gierson, B. Phillips, and D. Duthinh, "Evaluation of ASCE 7-10 wind velocity pressure coefficients on the components and cladding of low-rise buildings using recent wind tunnel testing data," in 6th Int. Conf. on Advances in Experimental Structural Engineering, 2015.
N. S. Fouad, G. H. Mahmoud, and N. E. Nasr, "Comparative study of international codes wind loads and CFD results for low rise buildings," Alexandria engineering journal, vol. 57, no. 4, pp. 3623-3639, 2017.
European Committee for Standardization: Eurocode 1: Actions on structures — General actions — Part 1-4: Wind actions, 2004.
Carga de viento. Método de cálculo, 2003.
Wind action on structures, 2009.
Australian/New Zeland Standart: Structural Design actions, Part 2: Wind Actions, 2011.
Architectural Institute of Japan. RLB Recommendations for loads on buildings. Structural Standards Committee, 2004.
J. D. Holmes, Wind loading of structures, ed. T.F. e-Library. New York, 2007.
H. Zeyrek and S. Bekiro?lu, "Assessment of wind pressure by eurocode-1, ts 498 and cfd analyses for double-sloped roof building," Sigma: Journal of Engineering & Natural Sciences/Mühendislik ve Fen Bilimleri Dergisi, 2019.
K.-s. Kwon, D.-w. Kim, R.-w. Kim, T. Ha, and I.-b. Lee, "Evaluation of wind pressure coefficients of single-span greenhouses built on reclaimed coastal land using a large-sized wind tunnel," Biosystems Engineering, vol. 141, pp. 58-81, 2016. https://doi.org/10.1016/j.biosystemseng.2015.11.007
R.-w. Kim, I.-b. Lee, U.-h. Yeo, and S.-y. Lee, "Estimating the wind pressure coefficient for single-span greenhouses using an large eddy simulation turbulence model," Biosystems Engineering, vol. 188, pp. 114-135, 2019. https://doi.org/10.1016/j.biosystemseng.2019.10.009
