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Wind loads on planar canopy roofs, Part 2: fluctuating pressure distributions and correlations

Ginger, J.D. / Letchford, C.W.

AbstractFluctuating pressure distributions on planar canopy roofs are presented based $1:100$ scale wind tunnel measurements obtained in a simulated suburban atmospheric boundary layer. For a range of roof pitch angles and wind directions, point and area-averaged pressure measurements were obtained with the worst loads experienced adjacent to lines of flow separation. For two particular roof pitches the cross correlations of area-averaged pressures were obtained and the covariance integration technique used to estimate the total fluctuating loads on the roof for a range of wind directions. Significant reductions in overall uplift and racking loads, were obtained using this method when compared with the traditional quasi-steady approach. This is because the partial correlation of fluctuating pressures is accounted for in covariance integration.

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Wind loads on planar canopy roofs, Part 2: fluctuating pressure distributions and correlations

Ginger, J.D. / Letchford, C.W.

AbstractFluctuating pressure distributions on planar canopy roofs are presented based $1:100$ scale wind tunnel measurements obtained in a simulated suburban atmospheric boundary layer. For a range of roof pitch angles and wind directions, point and area-averaged pressure measurements were obtained with the worst loads experienced adjacent to lines of flow separation. For two particular roof pitches the cross correlations of area-averaged pressures were obtained and the covariance integration technique used to estimate the total fluctuating loads on the roof for a range of wind directions. Significant reductions in overall uplift and racking loads, were obtained using this method when compared with the traditional quasi-steady approach. This is because the partial correlation of fluctuating pressures is accounted for in covariance integration.

Wind loads on planar canopy roofs, Part 2: fluctuating pressure distributions and correlations

Ginger, J.D. / Letchford, C.W.

AbstractFluctuating pressure distributions on planar canopy roofs are presented based $1:100$ scale wind tunnel measurements obtained in a simulated suburban atmospheric boundary layer. For a range of roof pitch angles and wind directions, point and area-averaged pressure measurements were obtained with the worst loads experienced adjacent to lines of flow separation. For two particular roof pitches the cross correlations of area-averaged pressures were obtained and the covariance integration technique used to estimate the total fluctuating loads on the roof for a range of wind directions. Significant reductions in overall uplift and racking loads, were obtained using this method when compared with the traditional quasi-steady approach. This is because the partial correlation of fluctuating pressures is accounted for in covariance integration.

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Title:

Wind loads on planar canopy roofs, Part 2: fluctuating pressure distributions and correlations

Contributors:

Ginger, J.D. (author) / Letchford, C.W. (author)

Published in:

Journal of Wind Engineering and Industrial Aerodynamics ; 51 ; 353-370

Publication date:

1993-10-19

Size:

18 pages

ISSN:

DOI:

https://doi.org/10.1016/0167-6105(94)90068-X

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Wind loads , Canopy roof , Coder , Covariance integration

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