Modification of Bridge Piers Scour Depth Equations using Genetic Algorithm

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KARAMI MOGHADAM MEHDI; SABZEVARI TOURAJ

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Journal: JOURNAL OF ENVIRONMENT AND WATER ENGINEERING Year:2018 | Volume:4 | Issue:2 Page(s): 101-114

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Title

Modification of Bridge Piers Scour Depth Equations using Genetic Algorithm

Author(s)

KARAMI MOGHADAM MEHDI | SABZEVARI TOURAJ | Issue Writer Certificate

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Abstract

One of the main reasons of bridge destruction is the bridge piers scour. A more accurate computation of scour depth would lead to a more solid design of bridge piers. Empirical equations can be applied to compute the scour depth. In this study, the coefficients of 17 empirical equations were optimized using genetic algorithm and fieldwork values. 80% of the field data were used to optimize the equations and the rest were used to verify them. The RMSE, MAE, E and R2 criteria were applied to evaluate the optimization method where the results showed the ability of genetic algorithm in empirical equations optimization. The Froehlich (1988) equation had the highest degree of precision among the empirical equations, so the genetic algorithm has had the least effect on the optimization of this equation. The optimized Neill (1964), Melville (1975), Laursen and Toch (1956), Blench II (1962) and Hancu (1971) equations with respectively, 75, 72, 71, 71 and 71 percent showed the highest reduction in RMSE error criteria. The optimized Blench II (1962) equation with RMSE, MAE, E and R2 criteria equal to 0. 57 m,-0. 085 m, 62 and 0. 65 percent respectively, presented the highest correlation coefficient and lowest error. In the end, more equations were proposed to predict the bridge piers scour depth.

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APA: Copy

KARAMI MOGHADAM, MEHDI, & SABZEVARI, TOURAJ. (2018). Modification of Bridge Piers Scour Depth Equations using Genetic Algorithm. JOURNAL OF ENVIRONMENT AND WATER ENGINEERING, 4(2 ), 101-114. SID. https://sid.ir/paper/268791/en

Vancouver: Copy

KARAMI MOGHADAM MEHDI, SABZEVARI TOURAJ. Modification of Bridge Piers Scour Depth Equations using Genetic Algorithm. JOURNAL OF ENVIRONMENT AND WATER ENGINEERING[Internet]. 2018;4(2 ):101-114. Available from: https://sid.ir/paper/268791/en

IEEE: Copy

MEHDI KARAMI MOGHADAM, and TOURAJ SABZEVARI, “Modification of Bridge Piers Scour Depth Equations using Genetic Algorithm,” JOURNAL OF ENVIRONMENT AND WATER ENGINEERING, vol. 4, no. 2 , pp. 101–114, 2018, [Online]. Available: https://sid.ir/paper/268791/en

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