钢管混凝土拱桥上部结构综合评价方法

为了合理地确定钢管混凝土拱桥上部结构的养护、维修加固方案,考虑钢管混凝土拱桥上部结构的结构特点对其缺损状态综合评价方法进行研究.通过建立缺损钢管混凝土拱桥上部结构多层次评估模型,研究模型中各元素的建议初始权重;构造正态关联函数计算确定无下属层元素评价指标与相应各评价等级的关联度,并考虑指标层及以下层各元素的缺损状态进行权重修正计算;同时与《公路桥涵养护规范》统一,采用关联度及部件评定标度共同表征桥梁的缺损状态.提出针对钢管混凝土拱桥上部结构的评价指标体系和成套评估方法.提出方法能较准确地评价钢管混凝土拱桥技术状态,为桥梁养护、决策提供科学依据.

Comprehensive method for evaluation on superstructure of CFST arch bridge

In order to establish a reasonable maintenance and strengthening scheme for CFST arch bridge,a comprehensive method for evaluating the damage conditions of the bridge is studied with consideration of its construction features.A multi-level evaluation model for the damaged CFST arch bridge is established,and evaluation indices in the rating standards are defined primarily in the model.A normal relational function is constructed to calculate the relational degree about the evaluation indices of each element,which has no sublevel elements to each rating grade.When evaluating the elements in sublevel or index level of the model,the weights of elements pertaining to one element are adopted by taking account of their deterioration degree.The damage conditions of bridge are characterized by relational degree and element evaluation scale,which is uniform with the Code for Maintenance of Highway Bridges and Culvers.The evaluation index system and a set of evaluation methods about the superstructure of CFST arch bridge are brought forward.The methods can evaluate the working condition of CFST arch bridge and offer a scientific basis for bridge maintenance and decision making.