论文部分内容阅读
为了准确地对在役双曲拱桥的耐久性进行评估,应用层次分析法建立了双曲拱桥耐久性评估的模型。应用模糊数学中隶属函数理论,对评估模型中的二个层次中的评估指标建立隶属函数,采用二级模糊综合评判进行耐久性评估。研究结果表明,在分析钢筋混凝土材料耐久性诸影响因素和双曲拱桥的结构特点的基础上,利用层次分析法,可以将双曲拱桥分解为多个部件,从而建立起由整体到局部的较为清晰的层次,同时可以确定各种影响因素对于桥梁耐久性的权重向量,较好的解决了不同桥梁由于各指标损伤程度不同而在评估时采用不同权重的问题。工程实例分析表明,评估结果与实际情况较为吻合,证明该方法是可行的,具有较好的工程实用性。
In order to accurately evaluate the durability of in-service two-way arch bridges, a model of durability evaluation of double-curved arch bridges is established by using analytic hierarchy process. Applying the theory of membership function in fuzzy mathematics, membership functions are established for the evaluation indexes in two levels in the assessment model, and the durability assessment is carried out by two-level fuzzy comprehensive evaluation. The results show that based on the analysis of the factors affecting the durability of reinforced concrete materials and the structural characteristics of the double-curved arch bridge, the double-curved arch bridge can be decomposed into multiple components by AHP, Clear level, at the same time, it can determine the weight vector of various influencing factors on the durability of the bridge, and better solves the problem that different bridges adopt different weights in the assessment due to the different damage degree of each index. The engineering example shows that the assessment result is in good agreement with the actual situation, which proves that the method is feasible and has good engineering practicability.