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大量的混凝土桥梁存在着不同程度的耐久性损伤,造成的结构破坏是严重的,直接影响到结构的正常使用,并严重地威胁着结构的安全性能。因此,对既有钢筋混凝土桥梁耐久性评估日益成为当前的研究热点。文章以层次分析法为基础,采用(型隶属函数,建立了基于模糊数学的既有钢筋混凝土桥梁上部结构耐久性指标评估模型。通过确定耐久性指标权重,较好地解决了不同桥梁由于各指标损伤程度不同而在评估时采用不同权重的问题。运用变权模糊综合评估原理进行了既有钢筋混凝土桥梁上部结构的耐久性评估。实例分析表明,评估结果与实际情况较为吻合,该方法是可行的。
A large number of concrete bridges have different degrees of durability damage, resulting in structural damage is serious, a direct impact on the normal use of the structure, and a serious threat to the structural safety performance. Therefore, the assessment of the durability of existing reinforced concrete bridges is increasingly becoming a hot research topic. Based on the analytic hierarchy process (AHP), an assessment model of the durability of the superstructure of the existing reinforced concrete bridges based on fuzzy mathematics is established. By determining the weights of durability indexes, Different degree of damage and different weight in the assessment.Using the principle of variable weight fuzzy comprehensive evaluation, the durability evaluation of the existing reinforced concrete bridge superstructure is carried out.Example analysis shows that the assessment results are in good agreement with the actual situation and the method is feasible of.