基于不确定型层次分析法的中小跨径桥梁耐久性评估技术

摘要

Bridge structure condition evaluation has important practical significance for ensuring safe operationof bridge and increasing transport efficiency. Considering the defects of existing regulations and traditional analytical methods and taking the upper main beam structure of medium - small span bridge as the study object, evaluation index system of bridge durability is established, uncertain analytic hierarchy process is adopted to calculate index weight, so as to reduce the effect of subjective factors and finally realize durability condition evaluation of bridge.%桥梁结构状态评估对于保证桥梁的安全运营，提高运输效率具有重要的现实意义。考虑到现有规范及传统分析方法的缺点，以中小跨径桥梁上部主梁结构为研究对象，制定桥梁耐久性评价指标体系，采用不确定型层次分析法计算指标权重，降低人为主观因素影响，最终实现桥梁的耐久性状态评估。