基于群组AHP的斜拉桥评估指标权重研究

发布时间：2019-04-23 13:00

【摘要】：为确定斜拉桥综合评估指标体系中的各指标权重,首先选取一致性比率、标度权重拟合度以及标度均匀性3个参数评判工程上常用的1-9标度法、指数标度法和分数标度法的性能优劣,进而选定e0/4~e8/4标度法作为判断矩阵的标度取值。其次应用模糊C均值聚类算法将专家的调查意见按权重向量的差异性进行分类,结合相关规范和评估要求遴选出所需分类。最后在所选分类中,考虑专家与群体判断的接近性与专家自身判断的逻辑性确定专家的综合权重,并通过加权平均确定最终的指标权重。以南京长江三桥的指标权重确定为例,分别用文中的方法和简单平均法进行指标权重的计算分析。结果表明,文中提出的计算方法相比简单平均方法更加重视专家意见的多样性,强调专家在构造判断矩阵中的实际表现以及群体意见的一致性,可供建立桥梁评估体系中的指标权重时参考。
[Abstract]:In order to determine the weight of each index in the comprehensive evaluation index system of cable-stayed bridge, the consistency ratio, the fitting degree of scale weight and the scale uniformity, which are commonly used in engineering evaluation, are firstly selected. The performance of exponential scaling method and fractional scaling method are good and bad, and then the e0/4~e8/4 scaling method is selected as the scaling value of the judgment matrix. Secondly, the fuzzy C-means clustering algorithm is used to classify the experts' opinion according to the difference of the weight vectors, and the required classification is selected according to the relevant norms and evaluation requirements. Finally, in the selected classification, considering the proximity of expert and group judgment and the logicality of expert's own judgment, the comprehensive weight of expert is determined, and the final index weight is determined by weighted average. Taking the index weight determination of the third Nanjing Yangtze River Bridge as an example, the calculation and analysis of the index weight are carried out by using the method in the paper and the simple average method respectively. The results show that the calculation method proposed in this paper attaches more importance to the diversity of expert opinions than the simple average method, and emphasizes the practical performance of experts in the construction of judgment matrix and the consistency of group views. It can be used for reference when establishing index weight in bridge evaluation system.
【作者单位】：东南大学交通学院;南京长江第三大桥有限责任公司;
【基金】：国家自然科学基金项目(51208096) 江苏省交通厅科技项目(2014Y02,2012Y25)
【分类号】：U448.27

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