Nose-angle bridge piers as alternative countermeasures for local scour reduction

Ibtesam Abudallah Habib, Wan Hanna Melini Wan Mohtar, Atef Elsaiad, Ahmed El-Shafie

Research output: Contribution to journalArticle

Abstract

This study investigates the performance nose-angle piers as countermeasures for local scour reduction around piers. Four nose angles were studied, i.e., 90°, 70°, 60° and 45° and tested in a laboratory. The sediment size was fixed at 0.39 mm whereas the flow angle of attack (or skew angle) was varied at four angles, i.e., skew angles, i.e., 0°, 10°, 20° and 30°. Scour reduction was clear when decreasing nose angles and reached maximum when the nose angle is 45°. Increasing the flow velocity and skew angle was subsequently increasing the scour profile, both in vertical and transversal directions. However, the efficiency of nose angle piers was only high at low Froude number less than 0.40 where higher Froude number gives minimal changes in the maximum scour depth reduction. At a higher skew angle, although showed promising maximum scour depth reduction, the increasing pier projected width resulted in the increase of transversal lengths.

Original languageEnglish
Pages (from-to)110-120
Number of pages11
JournalBaltic Journal of Road and Bridge Engineering
Volume13
Issue number2
DOIs
Publication statusPublished - 1 Jan 2018

Fingerprint

Bridge piers
Scour
Piers
Froude number
Angle of attack
Flow velocity
Sediments

Keywords

  • Local scour countermeasure
  • Nose-angle pier
  • Skew angle

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

Cite this

Nose-angle bridge piers as alternative countermeasures for local scour reduction. / Habib, Ibtesam Abudallah; Wan Mohtar, Wan Hanna Melini; Elsaiad, Atef; El-Shafie, Ahmed.

In: Baltic Journal of Road and Bridge Engineering, Vol. 13, No. 2, 01.01.2018, p. 110-120.

Research output: Contribution to journalArticle

Habib, Ibtesam Abudallah ; Wan Mohtar, Wan Hanna Melini ; Elsaiad, Atef ; El-Shafie, Ahmed. / Nose-angle bridge piers as alternative countermeasures for local scour reduction. In: Baltic Journal of Road and Bridge Engineering. 2018 ; Vol. 13, No. 2. pp. 110-120.
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