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Effect of chloride corrosion on eccentric compression response of concrete columns reinforced with steel-FRP composite bars
Ge, W.-J. Zhu, J.-W. Yang, Z.-P. Cai, X.-N. Yao, S. Yan, W.-H. Cao, D.-F. Lu, W.-G.
Ge, W.-J.
Zhu, J.-W.
Yang, Z.-P.
Cai, X.-N.
Yao, S.
Yan, W.-H.
Cao, D.-F.
Lu, W.-G.
Publication Date
2022-08
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(c) 2022 ASCE. This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://doi.org/10.1061/(ASCE)CC.1943-5614.0001231.
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Abstract
This paper presents test results of eccentrically loaded concrete columns reinforced with steel-fibre-reinforced polymer (FRP) composite bars (SFCBs) subjected to chloride corrosion. The first stage of the experimental work explored the tensile and compressive tests of various reinforcements (SFCBs with different cross section, steel and FRP bars) used in the large reinforced concrete (RC) columns after chloride corrosion with or without sustained stresses. The results showed that the tensile and compressive stress-strain relationships of SFCBs are characterised by stable secondary (post-yield) stiffness. The second stage of the testing investigated the structural performance of RC columns with various amounts and types of reinforcements, slenderness ratio, applied load eccentricity and chloride corrosion rate. The results showed that the effect of reinforcements on eccentric compression behaviour is significant. The deformation and crack width of SFCB RC columns, respectively, decreased by 12.2%~52.6% and 8.5%~71.0%, while the load capacity improved by 0.9%~18.8%, when compared with the corresponding FRP RC columns having the same eccentricity and reinforcement ratio. The use of SFCBs as the reinforcement of RC columns, especially with high reinforcement ratio or SFCBs having high area ratio of inner steel to SFCB, is beneficial to reduce the deflection and crack width as well as improve the bearing capacity utilization coefficients under serviceability limit state.
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Accepted manuscript
Citation
Ge W-J, Zhu J-W, Ashour AF et al (2022) Effect of chloride corrosion on eccentric compression response of concrete columns reinforced with steel-FRP composite bars. Journal of Composites for Construction. 26(4)
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