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基于模式识别理论,将模糊集贴近度的概念引入大跨桥梁状态评估中,利用模糊层次分析,建立起大跨悬索桥多目标评估的数学模型.以润扬大桥悬索桥的综合状态评估为例,介绍了评估的基本程序,包括评估指标的层次划分、指标权重的确定、模糊集隶属函数的定义以及贴近度的计算等.评估综合了健康监测系统的采集数据和人工监测结果2方面的信息,同时还给出了评估指标的分类方法和确定性指标、不确定性指标的计算方法.与传统的专家打分法相比,该方法更好地体现了监测信息的离散性、不确定性和评估过程的模糊性.
Based on the theory of pattern recognition, the concept of fuzzy set proximity is introduced into the state assessment of long-span bridges, and the mathematical model of multi-objective evaluation of long-span suspension bridges is established by fuzzy analytic hierarchy process The basic procedure of the assessment includes the evaluation of the hierarchy of indicators, the determination of indicator weights, the definition of fuzzy set membership functions and the calculation of closeness, etc. The evaluation combines the collected data of the health monitoring system with the results of manual monitoring 2, The methods of classification and certainty index and the calculation method of uncertainty index are also given.Compared with the traditional expert scoring method, this method better reflects the discreteness of the monitoring information, the uncertainty and the evaluation process Fuzziness.