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Fibre Bragg grating sensor investigation on bond stress of steel-carbon fibre reinforced concrete

Wang, L., Chen, J., Shen, N. & Fu, F. ORCID: 0000-0002-9176-8159 (2023). Fibre Bragg grating sensor investigation on bond stress of steel-carbon fibre reinforced concrete. Structures and Buildings, doi: 10.1680/jstbu.22.00090


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.

Publication Type: Article
Additional Information: This article has been published in Structures & Buildings by ICE Publishing.
Publisher Keywords: SFCB; pull out test; bond stress distribution; strain; fiber Bragg grating sensing technology
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Departments: School of Science & Technology > Engineering
[img] Text - Accepted Version
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