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戴隆强

（ 江西中煤建设集团有限公司 ，江西 南昌 330000)

摘   要 ：针对难以获取冲刷灾害危险性指数 、冲刷风险评估精度较低 、桥梁基础结构突发坍塌风险较大的问题 ，提出了基于 GA-WNN 的冲刷风险模糊评估方法 。在分析桥梁基础结构局部冲刷机理后，采用 GA- WNN网络构建冲刷风险评估指标体系 ，通过冲刷风险评估指标数据的无量纲化处理 ，计算模糊评估指标权值 ；采用冲刷灾害危险性指数来反映冲刷风险的程度，结合 GA-WNN 网络 ，校验矩阵的最大特征根 ，计算随机一致性比率 ，实现了冲刷风险模糊评估算法设计 。结果表明 ：文中方法在评估冲刷风险时，可以将相对误差控制在 2%以 内 ，大幅度提高了评估精度。

关键词 ：GA-WNN 网络 ；模糊评估 ；局部冲刷 ；桥梁基础结构 ；风险评估 ；冲刷机理

中图分类号 ：U443           

文献标志码 ：A            

文章编号 ：1005- 8249  (2024)   01- 0145- 05

DOI : 10. 19860/j . cnki . issn1005- 8249. 2024. 01 . 025

DAI Longqiang

( Zhongmei Engineering Group Ltd. ，Nanchang 330000 ,   China)

Abstract: 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.

Keywords: GA-WNN network; fuzzy evaluation; local scouring; bridge infrastructure; risk assessment; scouring mechanism;

作者简介 ：戴隆强  ( 1983—) ,  男 ，硕士 ，教授级高级工程师 ，主要研究方向 ：道桥工程。

收稿日期 ：2023- 10-20