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Rasoul Daneshfaraz

Rasoul Daneshfaraz

Academic rank: Professor
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Education: PhD.
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Faculty: 1
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Research

Title
Simulation of bridge pier scour depth base on geometric characteristics and field data using support vector machine algorithm
Type
JournalPaper
Keywords
Intelligent model Sensitivity analysis Scour depth Field data
Year
2020
Journal Journal of Applied Research in Water and Wastewater
DOI
Researchers Mahdi Majedi-Asl ، Rasoul Daneshfaraz ، Mahdi Fuladipanah ، JOHN ABRAHAM ، Mohammad Bagherzadeh

Abstract

In this paper, two groups of datasets including Froehlich (1988) and USGS were implemented to simulate scour depth for bridge piers of three shapes (circular, sharp-nose and rectangular) using support vector machine (SVM) algorithm. The results of the SVM were compared with gene expression programming (GEP) and the non-linear regression model. Independent parameters extracted using dimensional analysis were Froud number (Fr), the ratio of pier length to pier width (L/b), the ratio of sediment particle diameters (d50/d84), the ratio of sediment mean size to pier width (d50/b) and attack angle of water flow (α). Different combinations of independent variables were used to achieve optimum performance of the simulator. The results showed that among three simulators, the SVM algorithm had the best performance to predict local scour depth. The sensitivity analysis revealed that among independent parameters, the descending order of effectivity was Fr, sediment size, L/b, and α.