No AccessFibre 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).
No AccessFibre Bragg grating sensor investigation on bond stress of steel-carbon fibre reinforced concrete.
Proceedings of the Institution of Civil Engineers: Structures and Buildings,
doi: 10.1680/jstbu.22.00090
Abstract
Understanding the bonding stress distribution and reinforcement strain distribution between steel-carbon fiber composite bars (SFCB) and concrete is essential to the design of the new SFCB reinforced concrete. However, currently, the bond stress and reinforcement strain distribution patterns of SFCB concrete are not clear. Therefore, this paper carries out a series of pull-out tests on SFCB reinforced concrete and other two reinforcement and CFRP reinforced concrete. With the help of a new technology--fiber Bragg grating sensing technology, the reinforcement strain and bonding stress distribution between SFCB and concrete are studied. The results show that for all 3 types of specimens, the bond stress between reinforcement and concrete is neither uniformly distributed nor reduced linearly along the bond length. For the SFCB reinforcement, the steel core strain value is less than the carbon fiber strain value at the same position. Based on the test results, the bonding stress model and the bond stress distribution model are established. The two models agree well with the test data and can be used to predict the bond stress and bond stress distribution.
| Publication Type: | Article |
|---|---|
| Publisher Keywords: | SFCB; pull out test; bond stress distribution; strain; fiber Bragg grating sensing technology |
| Departments: | School of Science & Technology > Engineering |
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