PC桥梁承载力评估计算的层次分析与模糊评判法

摘要

According to the characteristics of PC (prestressed concrete) bridges, we make fuzzy classification of the various components' material damage degree of the bridge, using AHP (analytic hierarchy process )to determine the weight of each layer, and then making use of the fuzzy comprehensive evaluation to assess the situation in the carrying capacity of the existing bridges. This evaluation method can reflect the state of the bearing capacity of prestressed concrete bridge in service, which improves the assessment structural model of the carrying capacity. It optimizes the comprehensive assessment of the carrying capacity of old bridges, and engineering examples proving this point.%针对在役PC(预应力混凝土)桥梁的特点,对其各部件的材料损伤程度进行模糊分级,利用AHP(层次分析)法确定各层权重,并通过模糊综合评判评估计算在役桥梁的承载能力状况.该评定方法能够反映在役PC桥梁的承载力状态,改进了承载能力评判结构模型,优化了旧桥承载能力综合评估,且通过工程实例分析对此进行了很好的验证.