{"title":"风和交通联合作用下连续悬索桥吊索的腐蚀疲劳分析","authors":"","doi":"10.1016/j.engfailanal.2024.109037","DOIUrl":null,"url":null,"abstract":"<div><div>Suspenders and displacement-controlled device (DCD) are crucial force transmission components connecting the girder and the main cable in the continuous suspension bridge. These two structures will be subjected to environmental corrosion and fatigue loading simultaneously after the protection system fails. To investigate the safety of structure during the service, a comprehensive framework for corrosion fatigue analysis of continuous suspension bridge under the combined effects of wind and traffic flow was proposed. Taking a three-span continuous suspension bridge with DCD as engineering background, the wind-traffic combined load model was established and the fatigue life of the corroded suspenders was examined. Based on the Multilayer Perceptron algorithm, the impact of load form, environmental grade and DCD type on the corrosion fatigue performance of suspenders was analyzed. The results indicate that the fatigue life of suspender is significantly reduced due to uniform and pitting corrosion of the internal steel wires. The early failure mechanism of suspender is extremely sensitive to corrosion factors. Traffic load is the primary cause of fatigue damage to suspenders. Setting up DCD is beneficial for improving the corrosion fatigue life of the suspenders, and the selection of DCD type mainly depends on the topographical factors of the bridge site.</div></div>","PeriodicalId":11677,"journal":{"name":"Engineering Failure Analysis","volume":null,"pages":null},"PeriodicalIF":4.4000,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Corrosion fatigue analysis of suspenders on continuous suspension bridge under combined action of wind and traffic\",\"authors\":\"\",\"doi\":\"10.1016/j.engfailanal.2024.109037\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Suspenders and displacement-controlled device (DCD) are crucial force transmission components connecting the girder and the main cable in the continuous suspension bridge. These two structures will be subjected to environmental corrosion and fatigue loading simultaneously after the protection system fails. To investigate the safety of structure during the service, a comprehensive framework for corrosion fatigue analysis of continuous suspension bridge under the combined effects of wind and traffic flow was proposed. Taking a three-span continuous suspension bridge with DCD as engineering background, the wind-traffic combined load model was established and the fatigue life of the corroded suspenders was examined. Based on the Multilayer Perceptron algorithm, the impact of load form, environmental grade and DCD type on the corrosion fatigue performance of suspenders was analyzed. The results indicate that the fatigue life of suspender is significantly reduced due to uniform and pitting corrosion of the internal steel wires. The early failure mechanism of suspender is extremely sensitive to corrosion factors. Traffic load is the primary cause of fatigue damage to suspenders. Setting up DCD is beneficial for improving the corrosion fatigue life of the suspenders, and the selection of DCD type mainly depends on the topographical factors of the bridge site.</div></div>\",\"PeriodicalId\":11677,\"journal\":{\"name\":\"Engineering Failure Analysis\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.4000,\"publicationDate\":\"2024-11-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Engineering Failure Analysis\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1350630724010835\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Engineering Failure Analysis","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1350630724010835","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Corrosion fatigue analysis of suspenders on continuous suspension bridge under combined action of wind and traffic
Suspenders and displacement-controlled device (DCD) are crucial force transmission components connecting the girder and the main cable in the continuous suspension bridge. These two structures will be subjected to environmental corrosion and fatigue loading simultaneously after the protection system fails. To investigate the safety of structure during the service, a comprehensive framework for corrosion fatigue analysis of continuous suspension bridge under the combined effects of wind and traffic flow was proposed. Taking a three-span continuous suspension bridge with DCD as engineering background, the wind-traffic combined load model was established and the fatigue life of the corroded suspenders was examined. Based on the Multilayer Perceptron algorithm, the impact of load form, environmental grade and DCD type on the corrosion fatigue performance of suspenders was analyzed. The results indicate that the fatigue life of suspender is significantly reduced due to uniform and pitting corrosion of the internal steel wires. The early failure mechanism of suspender is extremely sensitive to corrosion factors. Traffic load is the primary cause of fatigue damage to suspenders. Setting up DCD is beneficial for improving the corrosion fatigue life of the suspenders, and the selection of DCD type mainly depends on the topographical factors of the bridge site.
期刊介绍：
Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies.
Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials.
Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged.
Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.
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