Variation and degradation of steel and concrete bond performance with corroded stirrups. (1st May 2017)

• Record Type: Journal Article
• Authors: Zhou, H.J.; Liang, X.B.; Zhang, X.L.; Lu, J.L.; Xing, F.; Mei, L.
• Is Part Of: Construction & building materials. Volume 138(2017)
• Page Start: 56
• Page End: 68
• Publication Date: 2017-05-01
• Subjects: Reinforced concrete -- Bond-slip -- Stirrup -- Corrosion -- Coefficient of variation; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2017.02.007
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Test of 60 specimens with stirrup corrosion levels from 0 to 20% was presented. Mean value and coefficient of variation of bond performance parameters were derived. Coefficient of variation increased for some bond parameters of corroded members. The degradation of bond strength was also compared to other test results. Abstract: Stirrups are more vulnerable than rebar to environmental corrosion in real reinforced concrete structures. Corrosion of stirrups would degrade the confinement and may damage bond between rebar and concrete. This paper studied effects of stirrups corrosion on bond behaviors. 60 specimens were manufactured and divided into 5 groups with stirrup corrosion levels in the targeted range of 0–20%. Monotonic pull-out and cyclic loading scenarios were carried out to get the parameters of bond behaviors. The test results showed the degradation of bond parameters are less severe compared to that of rebar corrosion. It was also found that coefficient of variation of bond strength and corresponding slip value increased significantly for corroded members compared to that of intact members.