基于模糊可拓集的跨海系杆拱桥耐久性评估  

Durability evaluations of sea-spanning tied-arch bridges based on fuzzy extensive sets

作　　者：李涛 黄亚娥 向敬 刘焕文 江浩 LI Tao;HUANG Yae;XIANG Jing;LIU Huanwen;JIANG Hao(School of Naval Architecture and Maritime,University of Zhejiang Ocean,Zhoushan 316022,China;Quzhou Highway,Port and Fairway Transportation Management Center,Quzhou 324000,China)

机构地区：[1]浙江海洋大学船舶与海运学院,浙江舟山316022 [2]衢州市公路港航与运输管理中心,浙江衢州324000

出　　处：《中南大学学报（自然科学版）》2021年第7期2470-2479,共10页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51879237);舟山市科技计划项目(2020C21013);中交路建集团项目(ZJLJGLTJ5A3JSFW2019011)。

摘　　要：针对海洋环境下跨海系杆拱桥吊杆腐蚀严重、服役寿命短等工程难题,构建模糊可拓集评价的跨海系杆拱桥耐久性评估模型;在分析不同因素对跨海系杆拱桥耐久性影响程度的基础上,利用可拓集理论对影响其耐久性因素的权重进行分析计算,并结合模糊评价方法建立跨海系杆拱桥耐久性评估物元模型与关联函数。研究结果表明:以浙江省岱山县江南大桥为例,利用本文提出的耐久性评估模型计算得到其耐久性状态整体等级为Ⅱ级,其变量特征值j^(*)=2.1754,且偏向于三级;经与规范推荐方法评价结果的对比分析,验证了评估模型在评价跨海桥梁的耐久性问题方面更加科学、合理,该评估模型的结论为跨海系杆拱桥梁维修加固与跨海桥梁日常养护提供了理论支持及依据。Focused on durability problems of sea-spanning tied-arch bridges in marine environments,durability evaluation models of sea-spanning tied-arch bridges were constructed based on fuzzy extension sets.On the basis of differences in the durability degrees caused by the various influencing factors on sea-spanning tied-arch bridges,marine environments were analyzed,and the weights of the influencing factors were calculated by using an extensive set theory.Besides,matter-element models were then established for this study's durability evaluations of sea-spanning tied-arch bridges using a fuzzy evaluation method.The results show that,taking Jiangnan Bridge in Daishan District,Zhejiang Province,for example,and by using the durability evaluation models established in this study,the durability grade of Jiangnan Bridge should be considered as Grade II holistically,with the variable eigenvalue j^(*)=2.1754 and a tendency of GradeⅢ.Compared with the results of the canonical recommended evaluation methods,the evaluation models established in this study are further validated to be more scientific and reasonable for durability evaluations of sea-spanning tied-arch bridges.In summary,the results in this study provide theoretical support and basis for the maintenance and reinforcement of sea-spanning tied-arch bridges.

关 键 词：跨海桥梁 耐久性评价 模糊可拓集 

分 类 号：U447[建筑科学—桥梁与隧道工程]