{"title":"Modelling bond in concrete with steel and carbon-fibre-reinforced-polymer composite bars","authors":"Lei Wang, Junwen Chen, N. Shen, F. Fu","doi":"10.1680/jstbu.22.00090","DOIUrl":null,"url":null,"abstract":"Understanding the bonding stress distribution and reinforcement strain distribution between steel and carbon-fibre-reinforced-polymer composite bars and concrete is essential to the design of concrete reinforced with such bars. Currently, the bond stress and reinforcement strain distribution patterns are not clear. Therefore, a series of pull-out tests was undertaken on concrete reinforced with steel and carbon-fibre-reinforced-polymer composite bars, carbon-fibre-reinforced-polymer bars and steel bars. With the help of a fibre Bragg grating sensing technology, the reinforcement strain and bonding stress distribution was studied. The results showed that for all specimens, the bond stress between the reinforcement and concrete was neither uniformly distributed nor reduced linearly along the bond length. For the steel and fibre-reinforced-polymer composite reinforcement, the steel core strain value was less than the carbon fibre strain value at the same position. Based on the test results, a bonding stress model and bond stress distribution model were established. The two models agreed well with the test data and can be used to predict bond stress and bond stress distribution.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1680/jstbu.22.00090","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Understanding the bonding stress distribution and reinforcement strain distribution between steel and carbon-fibre-reinforced-polymer composite bars and concrete is essential to the design of concrete reinforced with such bars. Currently, the bond stress and reinforcement strain distribution patterns are not clear. Therefore, a series of pull-out tests was undertaken on concrete reinforced with steel and carbon-fibre-reinforced-polymer composite bars, carbon-fibre-reinforced-polymer bars and steel bars. With the help of a fibre Bragg grating sensing technology, the reinforcement strain and bonding stress distribution was studied. The results showed that for all specimens, the bond stress between the reinforcement and concrete was neither uniformly distributed nor reduced linearly along the bond length. For the steel and fibre-reinforced-polymer composite reinforcement, the steel core strain value was less than the carbon fibre strain value at the same position. Based on the test results, a bonding stress model and bond stress distribution model were established. The two models agreed well with the test data and can be used to predict bond stress and bond stress distribution.
期刊介绍：
Structures and Buildings publishes peer-reviewed papers on the design and construction of civil engineering structures and the applied research associated with such activities. Topics include the design, strength, durability and behaviour of structural components and systems.
Topics covered: energy conservation, people movement within and around buildings, strength and durability of steel and concrete structural components, and the behaviour of building and bridge components and systems
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