基于K均值+Davies—Bouldin指数+PCA法的桥梁结构性能综合评估算法研究  

Research on Comprehensive Assessment Algorithm of Bridge Structural Performance Based on K-means+Davies-Bouldin Index+PCA Method

作　　者：姜宏维 程雨 段志 JIANG Hong-wei;CHENG Yu;DUAN Zhi(China Highway Engineering Consulting Corporation,Beijing 100097,China;Research and Development Center of Transport Industry of Technologies,Materials and Equipments of Highway Construction and Maintenance,Beijing 100097,China;CCCC Research and Development Center on Highway Pavement Maintenance,Beijing 100097,China;CHECC Road Maintenance and Testing Technology Co.Ltd.,Beijing 100097,China)

机构地区：[1]中国公路工程咨询集团有限公司,北京市100089 [2]公路建设与养护技术、材料及装备交通运输行业研发中心,北京市100097 [3]中交集团公路路面养护技术研发中心,北京市100097 [4]中咨公路养护检测技术有限公司,北京市100097

出　　处：《公路》2024年第4期124-132,共9页Highway

摘　　要：旨在提供一种确定评估桥梁结构构件性能的多参数综合评估算法模型,以指导桥梁结构体系的养护决策,确保其安全运行。首先,采用结构非线性分析方法,确定双层桁架系杆拱桥结构在极限状态下各构件的理论承载能力阈值。然后,基于聚类分析方法,采用改进的K均值法及Davies—Bouldin指数法对桥梁性能进行评估,利用主成分分析法对多参数进行关键因素的综合评估。最后,通过某双层桁架系杆拱桥实例进行验证,验证了对运营阶段拉索性能提出的评估方法的有效性与合理性。结果表明,提出的优化评估方法能有效地反映拉索结构的性能变化情况,为桥梁养护决策提供新的思路。This paper aims to propose a model that enables the determination of a multi-parameter integrated assessment algorithm for evaluating the performance of bridge structural members,with the intention to guide maintenance decisions related to the bridge structural system,ensuring its safe operation.Initially,a structural nonlinear analysis method is employed to determine the theoretical load carrying capacity thresholds for each member of a double-deck truss tie arch bridge structure in the limit state.Subsequently,the bridge performance is evaluated using the improved K-means method and Davies-Bouldin index method,based on the cluster analysis method.Principal component analysis is then applied to comprehensively assess the key factors associated with multiple parameters.Through a case study of a double-deck truss tie arch bridge,the effectiveness and validity of the assessment methods proposed in this paper for evaluating the performance of suspenders during the operation stage are verified.The results indicate that the optimized assessment method proposed in this paper accurately captures the performance changes of the tension cable structure and offers valuable insights for bridge maintenance decision-making.

关 键 词：桥梁工程 系杆拱桥 结构非线性分析 性能评估 聚类分析 Davies—Bouldin指数 主成分分析(PCA) 

分 类 号：U441.5[建筑科学—桥梁与隧道工程] U448.224[交通运输工程—道路与铁道工程]