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戴隆強

（ 江西中煤建設集團有限公司 ，江西 南昌 330000)

摘   要 ：針對難以獲取沖刷災害危險性指數 、沖刷風險評估精度較低 、橋梁基礎結構突發坍塌風險較大的問題 ，提出了基于 GA-WNN 的沖刷風險模糊評估方法 。在分析橋梁基礎結構局部沖刷機理后，采用 GA- WNN網絡構建沖刷風險評估指標體系 ，通過沖刷風險評估指標數據的無量綱化處理 ，計算模糊評估指標權值 ；采用沖刷災害危險性指數來反映沖刷風險的程度，結合 GA-WNN 網絡 ，校驗矩陣的最大特征根 ，計算隨機一致性比率 ，實現了沖刷風險模糊評估算法設計 。結果表明 ：文中方法在評估沖刷風險時，可以將相對誤差控制在 2%以 內 ，大幅度提高了評估精度。

關鍵詞 ：GA-WNN 網絡 ；模糊評估 ；局部沖刷 ；橋梁基礎結構 ；風險評估 ；沖刷機理

中圖分類號 ：U443           

文獻標志碼 ：A            

文章編號 ：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;

作者簡介 ：戴隆強  ( 1983—) ,  男 ，碩士 ，教授級高級工程師 ，主要研究方向 ：道橋工程。

收稿日期 ：2023- 10-20