Effect of spacing and skew-angle on clear-water scour at pier alignments

• Type: Article in International Conference Proceedings Book
• Date: 2012

Authors

Rui Lança (Author) Other; Cristina Fael (Author) Other; Rodrigo Maia (Author) FEUP; João Pedro Pêgo (Author) FEUP; António Heleno Cardoso (Author) Other

Conference proceedings International

Title: RiverFlow 2012

Pages: 927-933

RiverFlow 2012

San José, Costa Rica

Indexing

ISI Proceedings

ISI Web of Science

Scopus

Scientific classification

CORDIS: Technological sciences > Engineering > Civil engineering > Hydraulic engineering

FOS: Engineering and technology > Civil engineering

Associated Projects

PTDC/ECM/101353/2008 - Estudo experimental de erosões localizadas junto de pilares complexos

Other information

Abstract (EN): Pier alignments, defined as single-row pier groups, displayed normal to main bridges’ axes, are frequently used to support bridge decks. Different alignments configurations, characterized by different combinations of piers’ shape and spacing and skew-angle of the alignment to the flow direction, lead to different interactions with the flow field and to different scour depths. Twenty six long lasting – 7 to 15 days – laboratory experiments were run under steady clear-water flow conditions, close to the threshold condition of beginning of sediment motion, to address the effect of pier spacing and skew-angle on the equilibrium scour depth. Alignments consisted of four cylindrical piers spaced of 1, 2, 3, 4.5 and 6 pier diameters; tested skew-angles were 0◦, 15◦, 30◦, 45◦ and 90◦. The main contribution of the paper derives from the long duration of the experiments. The functional relation of issued equilibrium scour depth with pier spacing and skew-angle is established and the dependence of the traditional group correction factor on the same variables is defined.

Language: English

Type (Professor's evaluation): Scientific

Notes: ISBN 9780415621298 - CAT# K14897

No. of pages: 7