Wind action on flat roofs
Tomasz Lipecki
Department of Structural Mechanics; Faculty of Civil Engineering and Architecture; Lublin University of Technology (Poland)
https://orcid.org/0000-0002-2867-773X
Abstract
The paper deals with the wind action on flat roofs of rectangular shapes which can be considered for medium-rise and high-rise buildings. Distributions of mean pressure coefficient Cp on flat roofs were measured. All analyses were based on model measurements which had been performed in the boundary layer wind tunnel in Wind Engineering Laboratory of Cracow University of Technology. Vertical, fixed in the floor of the wind tunnel on the turn table rectangular prisms of the ratio of cross-section dimensions 1:2 and 1:4 were investigated. Measurements were carried out for the angle of wind attack in the range 0°-90°, every 15°. The influence of the wind structure on pressures was investigated in six different cases of the approaching wind.
Keywords:
wind tunnel, model tests, wind action, aerodynamic coefficient of pressure, drag and lift, flat roofsReferences
Uematsu Y., Watanabe K., Sasaki V., Yamada M., Hongo T. Wind-induced dynamic response and resultant load estimation of a circular flat roof. Journal of Wind Engineering and Industrial Aerodynamics 83 (1999) 251-261.
Google Scholar
Uematsu Y., Moteki T., Hongo T. Model of wind pressure field on circular flat roofs and its application to load estimation. Journal of Wind Engineering and Industrial Aerodynamics 96 (2008) 1003–1014.
Google Scholar
Fu J.Y., Li Q.S., Xie Z.N. Prediction of wind loads on a large flat roof using fuzzy neural networks. Engineering Structures 28 (2006) 153–161.
Google Scholar
Stathopoulos T., Marathe R., Wu H. Mean wind pressures on flat roof corners affected by parapets: field and wind tunnel studies. Engineering Structures 21 (1999) 629–638.
Google Scholar
Cao J., Tamura Y., Yoshida A. Wind pressures on multi-level flat roofs of medium-rise buildings. Journal of Wind Engineering and Industrial Aerodynamics 103 (2012) 1–15.
Google Scholar
Pindado S., Meseguer J., Franchini S. Influence of an upstream building on the wind-induced mean suction on the flat roof of a low-rise building. Journal of Wind Engineering and Industrial Aerodynamics 99 (2011) 889–893.
Google Scholar
Richards P.J., Hoxey R.P. Flow reattachment on the roof of a 6 m Cube. Journal of Wind Engineering and Industrial Aerodynamics 94 (2006) 77–99.
Google Scholar
Richards P.J., Hoxey R.P. Wind loads on the roof of a 6m Cube. Journal of Wind Engineering and Industrial Aerodynamics 96 (2008) 984–993.
DOI: https://doi.org/10.1016/j.jweia.2007.06.032
Google Scholar
Banks D., Meroney R.N., Sarkar P.P., Zhao Z., Wu F. Flow visualization of conical vortices on flat roofs with simultaneous surface pressure measurement. Journal of Wind Engineering and Industrial Aerodynamics 84 (2000) 65-85.
Google Scholar
Wu F., Sarkar P.P., Mehta K.C., Zhao Z. Influence of incident wind turbulence on pressure fluctuations near flat-roof corners. Journal of Wind Engineering and Industrial Aerodynamics 89 (2001) 403–420.
Google Scholar
Banks D., Meroney R.N. A model of roof-top surface pressures produced by conical vortices: model development. Wind and Structures 4(3) (2001) 227–246.
Google Scholar
Kawai H. Local peak pressure and conical vortex on building. Journal of Wind Engineering and Industrial Aerodynamics 90 (2002) 251–263.
DOI: https://doi.org/10.1016/S0167-6105(01)00218-5
Google Scholar
Ono Y., Tamura T., Kataoka H. LES analysis of unsteady characteristics of conical vortex on a flat roof. Journal of Wind Engineering and Industrial Aerodynamics 96 (2008) 2007–2018.
Google Scholar
Tryggeson H., Lyberg M.D. Stationary vortices attached to flat roofs. Journal of Wind Engineering and Industrial Aerodynamics 98 (2010) 47–54.
DOI: https://doi.org/10.1016/j.jweia.2009.09.001
Google Scholar
Li Q.S, Hu S.Y., Dai Y.M. He Y.C. Field measurements of extreme pressures on a flat roof of a low-rise building during typhoons. Journal of Wind Engineering and Industrial Aerodynamics 111 (2012) 14–29.
Google Scholar
Counihan J. An improved method of simulating an atmospheric boundary layer in a wind tunnel. Atmospheric Environment 3(2) (1969) 197-214.
DOI: https://doi.org/10.1016/0004-6981(69)90008-0
Google Scholar
Counihan J., Simulation of an adiabatic urban boundary layer in the wind tunnel. Atmospheric Environment 7 (1973) 673-689.
Google Scholar
Bęc J., Lipecki T., Błazik-Borowa E. Research on wind structure in the wind tunnel of Wind Engineering Laboratory of Cracow University of Technology. Journal of Physics: Conference Series, 318 (2011) 072003, doi: 10.1088/1742-6596/318/7/072003.
DOI: https://doi.org/10.1088/1742-6596/318/7/072003
Google Scholar
Lipecki T., Jamińska J. Influence of wind structure and aspect ratio of circular cylinders on mean wind pressure coefficient. Task Quarterly 16(3) (2012) 203–218.
Google Scholar
Lipecki T., Błazik-Borowa E., Bęc J. Wind structure influence on surface pressures of rectangular cylinders at various angles of wind attack. Proceedings of the 13th International Conference on wind Engineering, Amsterdam, Holandia, 2011.
Google Scholar
Lipecki T., Bęc J., Błazik-Borowa E. Surface pressures on rectangular cylinders – the dependence on aspect ratio, wind structure and angle of wind attack. Proceedings of 7th International Symposium on Bluff Body Aerodynamics and Applications, Szanghaj, Chiny, 2012.
Google Scholar
Authors
Tomasz LipeckiDepartment of Structural Mechanics; Faculty of Civil Engineering and Architecture; Lublin University of Technology Poland
https://orcid.org/0000-0002-2867-773X
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