基于层次分析法的在役RC桥梁耐久性评估

Durability evaluation of existing reinforced concrete bridges based on AHP

将层次分析法(AHP)应用于评估中,以在役钢筋混凝土桥梁(RC桥梁)耐久性为评估目标,确定以钢筋锈蚀、混凝土碳化、氯离子侵蚀、混凝土最大裂缝宽度、混凝土质量和混凝土损伤为评估指标,建立了评估模型。通过对比判断矩阵确定耐久性指标权重并进行修正,实现了不同桥梁由于各指标不同损伤程度而在评估时采用不同权重。运用变权模糊综合评估原理进行了在役钢筋混凝土桥梁上部结构的耐久性评估。结果表明,基于AHP的在役RC桥梁耐久性评估,能根据桥梁状况定量评价桥梁上部结构的耐久性。

Based on AHP, this paper set up the durability index evaluation model, raised steel erosion, concrete carbonation, chlorine ion erosion, the maximum crack width of concrete, quality and damage of concrete as evaluation indices to evaluate the durability of existing reinforced concrete bridge. Based on the judgment matrix, the different index weights can be determined according to damage degree by fixing the durability index weights. The durability evaluation of the existing reinforced concrete bridges＇ superstructure was processed by applying the variable weight principle of comprehensive evaluation. The analysis of a practical example shows that the evaluation method is feasible by comparing the evaluation result with actual condition. 2 tabs, 1 fig, 10 refs.