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 roofs

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


Published
2014-06-11

Cited by

Lipecki, T. (2014) “Wind action on flat roofs”, Budownictwo i Architektura, 13(2), pp. 239–246. doi: 10.35784/bud-arch.1901.

Authors

Tomasz Lipecki 

Department 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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