Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Clear-Water Local Scour at Skewed Complex Bridge Piers
An experimental study on flow-induced clear-water local scour at complex bridge piers was conducted using two typical pier models, nine pile-cap elevations, and seven pier skew angles from 0° to 90° with a 15° interval. Results show that a slight skew angle imposed on an originally aligned pier can significantly increase the equilibrium scour depth . When a pier was skewed to the flow, the column made the largest contribution to the scour depth because its wide-pier feature became dominant. Three categories of the pier skewness were defined, namely, an aligned pier (= 0°), a slightly skewed pier (), and a highly skewed pier (). The influences of the pile cap and the pile group on the scouring process were weakened with increasing . Additionally, for highly skewed piers with fully submerged pile cap, the equilibrium scour holes tended to equally expose the pier components, no matter the location of the undisturbed bed level. A new scour prediction method is presented, involving modifications for the effect of sediment coarseness. The new method leads to a higher safety margin with significantly reduced underestimation.
Clear-Water Local Scour at Skewed Complex Bridge Piers
An experimental study on flow-induced clear-water local scour at complex bridge piers was conducted using two typical pier models, nine pile-cap elevations, and seven pier skew angles from 0° to 90° with a 15° interval. Results show that a slight skew angle imposed on an originally aligned pier can significantly increase the equilibrium scour depth . When a pier was skewed to the flow, the column made the largest contribution to the scour depth because its wide-pier feature became dominant. Three categories of the pier skewness were defined, namely, an aligned pier (= 0°), a slightly skewed pier (), and a highly skewed pier (). The influences of the pile cap and the pile group on the scouring process were weakened with increasing . Additionally, for highly skewed piers with fully submerged pile cap, the equilibrium scour holes tended to equally expose the pier components, no matter the location of the undisturbed bed level. A new scour prediction method is presented, involving modifications for the effect of sediment coarseness. The new method leads to a higher safety margin with significantly reduced underestimation.
Clear-Water Local Scour at Skewed Complex Bridge Piers
Yang, Yifan (Autor:in) / Melville, Bruce W. (Autor:in) / Sheppard, D. M. (Autor:in) / Shamseldin, Asaad Y. (Autor:in)
19.03.2018
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Local Scour at Skewed Bridge Piers
| British Library Conference Proceedings | 1999
Local Scour at Skewed Bridge Piers
| British Library Conference Proceedings | 1993
| British Library Online Contents | 1998
| Online Contents | 1998