Wind and Structures

  • 제13권2호
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  • Pages.145-167
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  • 2010
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR Code

Effects of wind direction on the flight trajectories of roof sheathing panels under high winds

  • Kordi, Bahareh (Boundary Layer Wind Tunnel Laboratory, Faculty of Engineering, University of Western Ontario) ;
  • Traczuk, Gabriel (Boundary Layer Wind Tunnel Laboratory, Faculty of Engineering, University of Western Ontario) ;
  • Kopp, Gregory A. (Boundary Layer Wind Tunnel Laboratory, Faculty of Engineering, University of Western Ontario)
  • 투고 : 2009.09.25
  • 심사 : 2009.12.15
  • 발행 : 2010.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

By using the 'failure' model approach, the effects of wind direction on the flight of sheathing panels from the roof of a model house in extreme winds was investigated. A complex relationship between the initial conditions, failure velocities, flight trajectories and speeds was observed. It was found that the local flow field above the roof and in the wake of the house have important effects on the flight of the panels. For example, when the initial panel location is oblique to the wind direction and in the region of separated flow near the roof edge, the panels do not fly from the roof since the resultant aerodynamic forces are small, even though the pressure coefficients at failure are high. For panels that do fly, wake effects from the building are a source of significant variation of flight trajectories and speeds. It was observed that the horizontal velocities of the panels span a range of about 20% - 95% of the roof height gust speed at failure. Numerical calculations assuming uniform, smooth flow appear to be useful for determining panel speeds; in particular, using the mean roof height, 3 sec gust speed provides a useful upper bound for determining panel speeds for the configuration examined. However, there are significant challenges for estimating trajectories using this method.

키워드

참고문헌

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  7. An investigation of plate-type windborne debris flight using coupled CFD–RBD models. Part I: Model development and validation vol.111, 2012, https://doi.org/10.1016/j.jweia.2012.07.008
  8. An investigation of plate-type windborne debris flight using coupled CFD–RBD models. Part II: Free and constrained flight vol.111, 2012, https://doi.org/10.1016/j.jweia.2012.07.011
  9. Effects of initial conditions on the flight of windborne plate debris vol.99, pp.5, 2011, https://doi.org/10.1016/j.jweia.2011.02.009
  10. Fragility curves for building envelope components subject to windborne debris impact vol.107-108, 2012, https://doi.org/10.1016/j.jweia.2012.05.005
  11. Windborne debris and damage risk models: a review vol.13, pp.2, 2010, https://doi.org/10.12989/was.2010.13.2.095
  12. Performance of hurricane shutters under impact by roof tiles vol.32, pp.10, 2010, https://doi.org/10.1016/j.engstruct.2010.07.012
  13. Three-dimensional probabilistic wind-borne debris trajectory model for building envelope impact risk assessment vol.102, 2012, https://doi.org/10.1016/j.jweia.2012.01.002
  14. Current and Future Directions for Wind Research at Western: Disaster Mitigation and the 'Three Little Pigs' Project vol.35, pp.4, 2010, https://doi.org/10.5359/jawe.35.282
  15. The critical velocity for aggregate blow-off from a built-up roof vol.107-108, 2012, https://doi.org/10.1016/j.jweia.2012.03.031
  16. A method to assess peak storm wind speeds using detailed damage surveys vol.33, pp.1, 2011, https://doi.org/10.1016/j.engstruct.2010.09.021
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