基于GA-WNN的桥梁基础结构局部冲刷风险模糊评估方法
Fuzzy Evaluation Method of Local Scour Risk of Bridge Infrastructure based on GA-WNN
戴隆强1
作者信息
- 1. 江西中煤建设集团有限公司, 江西 南昌 330000
- 折叠
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.
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.
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Key words
GA-WNN network/fuzzy evaluation/local scouring/bridge infrastructure/risk assessment/scouring mechanism引用本文复制引用
出版年
2024
NETL
NSTL
万方数据