混凝土桥梁预防性养护的评价体系

Evaluation System of Concrete Bridges Preventive Maintenance

针对公路常用钢筋混凝土桥梁,对预防性养护评价技术进行了研究。考虑桥梁主梁、墩台基础及桥面等3个主要构件,提出以耐久性指标为目标的层次评价分析模型,采用层次分析理论(AHP),根据对《公路桥涵养护规范》及许多工程的调查结果确定了指标层权重;并在综合评价过程中采用变权原理对模糊综合评价结果进行了处理,使结果更为均衡,建立了一套较完整的公路常用桥梁预防性养护评价体系,把不可测量的混凝土结构或构件耐久性逐层分解为可现场检测的定性或定量指标。实例表明本方法具有可操作性和逻辑性。

In this paper,we study the evaluation technique of preventive maintenance in the reinforced concrete beam bridges.We develope a analytic hierarchy process model for three bridge components,which takes the durability of the bridge as the criteria.According to Code for Maintenance of Highway Bridges and Culverts and the practcal survey,the weights of sub-criteria are determined.Further,we optimize the results of AHP method by employing the variable weight principle.Therefore,one complete evaluation system about the preventive maintenance in the reinforced concrete beam bridges is built.A practical example shows that the method is reasonable and operable.