Fuzzy Evaluation Method of Local Scour Risk of Bridge Infrastructure based on GA-WNN
Aiming at the problem that it is difficult to obtain the risk index of scouring disaster,the low accuracy of scouring risk assessment and the high risk of sudden collapse of bridge infrastructure,a fuzzy evaluation method of scouring risk based on GA-WNN is proposed.The local scouring mechanism of bridge infrastructure is analyzed,and the scouring risk evaluation index system is constructed by using GA-WNN network.Through the dimensionless processing of scouring risk evaluation index data,the weight of fuzzy evaluation index is calculated;The scour risk index is used to reflect the degree of scour risk.Combined with GA-WNN network,the maximum characteristic root of the check matrix is used to calculate the random consistency ratio,and the fuzzy evaluation algorithm of scour risk is designed.The results of example analysis show that the relative error can be controlled within 2% when evaluating the scouring risk,and the evaluation accuracy is greatly improved.
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