Civil and Project journal

study of numerically ability to estimate scouring around bridge piers in extreme rainfall conditions

https://doi.org/10.22034/cpj.2024.452007.1268
Volume 6, Issue 3 - Serial Number 61
May 2024
Pages 11-28
Civil and Project journal

Document Type : Research Article

Authors

Roozbeh Aghamajidi 1
Amir Kamanbedast 2

1 Assistant Professor, Faculty Of Engineering, Islamic Azad University, Sepidan Unit, Fars,

2 Assistant professorDepartment of Civil Engineering, Bey. C., Islamic Azad University, Beyza, Iran

Abstract
In this study, the effect of change of flow discharge on the scouring around the piers of the fifth bridge of Dezful was investigated using the Hsec-RAS numerical model. For this purpose, a hydraulic model was created from the range of the river in which the bridge is located in the software by using field data. Then, by entering the data on the scouring of the bridge bases for the discharge of 25 to 1850 m3/s with different time steps, the effect of change of flow discharge on the scour around the middle and lateral piers of the bridge was investigated. The results of numerical model show a trend The increase was such that in low to moderate discharges (329m3/s) the scouring rate around the middle piers had the highest value, but in high discharges and flood conditions the scurry in the right support had the highest value, also up to 1630 m3/s flood conditions, the scouring rate in the left support had the lowest value, which was due to the morphology of the river bed and the Conditions are the creation of secondary currents in the arc.

Keywords

Hec-Ras numerical model
Discharge changes
Bridge base
Flood
Scour
Subjects

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  • Receive Date 13 March 2024
  • Revise Date 12 April 2024
  • Accept Date 16 April 2024
  • First Publish Date 16 April 2024
  • Publish Date 21 May 2024

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