强震区拱桥安全评价指标与方法研究

针对强震区拱桥的安全评价,充分考虑强震区拱桥的受力特点,从环境条件、上部结构和下部结构三方面建立了由1个顶层指标、3个一级指标、10个二级指标和15个三级指标组成的强震区拱桥安全评价指标体系及量化方法。采用不确定层次分析法确定权重,结合模糊综合评判方法进行多级综合评价,确定拱桥的安全等级。据此提出了强震区拱桥安全评价模型。研究结果为强震区拱桥安全评价提供了重要依据,对强震区拱桥前期防护和后期修复都有一定的参考价值和指导意义。

Based on the safety evaluation of arch bridges in meizoseismal area,the loading features ware fully considered and on the base of environmental condition,the superstructure and the substructure three aspects,the safety evaluation index system of arch bridges in meizoseismal area and its quantitative method ware built,which is composed of 1 top level index,3 first grade indexes,10 second grade indexes and 15 third grade indexes.Using uncertain AHP and the fuzzy comprehensive judgment method to carry on multi-level comprehensive evaluation and determine the arch bridges'safety grade,then a safety assessment model of arch bridges in meizoseismal area have been put forward.The results provide important evidence for the safety evaluation of arch bridges in meizoseismal area,and have reference value and guiding significance for previous protection and post repair of arch bridges in meizoseismal area.