既有中(下)承式混凝土拱桥耐久性模糊贴近度的综合评价

Fuzzy Nearness Comprehensive Assessment of Durability of Existing Half-through and Through Concrete Arch Bridges

根据中(下)承式混凝土拱桥的结构特点,对既有中(下)承式混凝土拱桥耐久性评估问题进行了研究。依据层次分析法的基本思想,建立了完整的中(下)承式混凝土拱桥耐久性评价模型及其指标体系;同时运用模糊综合评判原理,对中(下)承式混凝土拱桥耐久性的模糊贴近度综合评价方法进行了探讨。两个实际工程的检验表明,评价结果较好地反映了既有桥梁结构的耐久性,该评价方法具有较好的工程实用性。

The evaluation of the durability of half-through and through concrete arch bridges on service was discussed. On the base of the Analytic Hierarchy Process, the synthetic evaluation model and index system for the durability of half-through and through concrete arch bridges were completely established. At the same time, with the comprehensive fuzzy assessment theory, the evaluation method based on fuzzy nearness for the model was discussed. Finally, this method has been used to evaluate the durability of a half-through reinforced concrete arch bridge and a through concrete-filled steel tubular arch bridge, and the assessment results well demonstrated the durability of these two arch bridges and also the validity of this method.