Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/3435
Título: Clear-water scour at comparatively large cylindrical piers
Autor: Lança, Rui
Fael, Cristina
Maia, Rodrigo
Pêgo, João
Cardoso, António
Palavras-chave: Bridges
Cylindrical pier
Flow shallowness
Sediment coarseness
Local scour equilibrium depth
Local scour time evolution
Data: Nov-2013
Editora: American Society of Civil Engineering
Relatório da Série N.º: 139;
Resumo: New long-duration clear-water scour data were collected at single cylindrical piers with the objective of investigating the effect of sediment coarseness, Dp=D50 (Dp = pier diameter; D50 = median grain size) on the equilibrium scour depth and improving the scour depth time evolution modeling by making use of the exponential function suggested in the literature. Experiments were carried out for the flow intensity close to the threshold condition of initiation of sediment motion, imposing wide changes of sediment coarseness and flow shallowness, d=Dp (d = approach flow depth). The effect of sediment coarseness on the equilibrium scour depth was identified; existing predictors were modified to incorporate this effect for U=Uc ≈ 1.0; Dp=D50 > ≈60 and d=Dp ≥ 0.5; the complete characterization of a known scour depth time evolution model was achieved for U=Uc ≈ 1.0, 60 < Dp=D50 < 500 and 0.5 ≤ d=Dp ≤ 5.0.
Peer review: yes
URI: http://hdl.handle.net/10400.1/3435
DOI: http://dx.doi.org/10.1061/(ASCE)HY.1943-7900.0000788
ISSN: 0733-9429
Versão do Editor: http://ascelibrary.org/doi/abs/10.1061/(ASCE)HY.1943-7900.0000788
Aparece nas colecções:ISE2-Artigos (em revistas ou actas indexadas)

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