LARHYSS Journal
Volume 21, Numéro 1, Pages 29-43
2024-09-15
Effect Of Perforated Collar Shape And Opening Percentage On Scouring Around Bridge Piers
Authors : Bagheri Ahmad . Bordbar Amin . Heidarnejad Mohammad . Masjedi Alireza .
Abstract
Scouring is considered as a major contributor to bridge failure in across the world. The expansion of the scour hole can lead to instability of the bridge structure. Consequently, scour depth prediction is considered a common river engineering practice to take necessary controlling measures. Accordingly, this study investigated the impact of perforated collars of different shapes on scouring around bridge piers. It was found that the scour further decreased as the collar shape was changed from the triangular to the rectangular one. By installing triangular, circular, square, and rectangular perforated collars with the same hole diameter (d/D) of 0.1, maximum scour depth respectively decreased by 35.2, 37.4, 38.4, and 50.9% in comparison with the collar-less bridge pier. Installation of the triangular, circular, square, and rectangular perforated collars with a hole diameter (d/D) of 0.15 reduced scouring respectively by 27.7, 31.6, 33.4, and 45.8% compared to the collar-less pier. Scouring respectively decreased by 16.6, 22.3, 24.7, and 27.6% compared to the collar-less pier by installing the triangular, circular, square, and rectangular perforated collars with a constant hole diameter (d/D) of 0.2. Scouring increased by 29.7% on average at all velocities as the diameter of the collar hole (d/D) increased from 0.1 to 0.2. Furthermore, scouring increased with increasing velocity. Scouring was found to increase by 94.7% on average with a rise from 0.54 to 0.95 of the flow intensity (V/Vc).
Keywords
Bridge pier ; Perforated collar ; Scouring ; Triangular collar ; Rectangular collar ; Square collar ; Circular collar
Les articles similaires
Bouazza H.
.
Djelil M.
.
Matallah M.
.
pages 525-540.
Bouazza H.
.
Djelil M.
.
Matallah M.
.
pages 225-231.
الخال سمير
.
ص 265-278.
Chafa Ameur
.
Kettab Khaled
.
pages 571-590.
Belguesmia Khalil
.
Belas Belaribi Nadia
.
Amiri Ouali
.
Leklou Nordine
.
Belaribi Omar
.
pages 47-55.
