装配式预应力混凝土箱梁桥加固方案优选研究

Study on the Optimal Reinforcement Scheme of Prefabricated Prestressed Concrete Box Girder Bridge

为解决装配式预应力混凝土箱梁桥加固方案优选难题,通过指标归一化、层次分析法与离差最大化相组合赋权的方法确定评价指标权重,建立了基于组合赋权的评价指标体系TOPSIS模型;同时通过构造理想解与负理想解,以方案相对贴近度大小来判断方案优劣,解决了加固方案优选问题,并将组合赋权的TOPSIS模型及方案相对贴近度大小判断方案优劣成果应用于实桥中。

In order to solve the problem of optimizing reinforcement scheme of prefabricated prestressed concrete box girder bridge,this paper establishes a TOPSIS model of evaluation index system based on portfolio weighting by the evaluation index weight determined by the combination weighting approach of index normalization,analytic hierarchy process and deviation maximization.At the same time,the ideal solution and the negative ideal solution are constructed,and the relative closeness degree of the scheme is used to judge the merits of the scheme.The optimization problem of reinforcement scheme is solved.The combination weighting TOPSIS model and the relative closeness degree of the scheme used for judging merits of the scheme are applied to the real bridge.