Compressive behavior of FRP ring-confined concrete in circular columns: Effects of specimen size and a new design-oriented stress-strain model

• Published in: Construction & building materials Vol. 201; pp. 350 - 368
• Main Authors: Guo, Yong-Chang, Gao, Wan-Yang, Zeng, Jun-Jie, Duan, Zhi-Jian, Ni, Xiang-Yu, Peng, Kai-Di
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 20.03.2019; Reed Business Information, Inc. (US)
• Subjects: Analysis; Circular column; Column size; Compressive strength; Confinement; Design-oriented stress-strain model; Fiber reinforced concrete; FRP; FRP ring-confined concrete; Mechanical properties; Partial wrapping; Stress-strain curves; China; Confinement; FRP; Design-oriented stress-strain model; Circular column; Partial wrapping; Column size; FRP ring-confined concrete
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2018.12.183

•Effect of column size on axial compressive behavior of FRP ring-confined concrete is studied.•The effect of column size is negligible for FRP ring-confined concrete.•The axial and hoop strains distributions are presented.•A new design-oriented stress-strain model for FRP ring-confined concrete is proposed. This paper presents the results of an experimental program aiming to investigate the effect of the specimen size on the axial compressive behavior of circular concrete columns wrapped with spaced FRP rings. A database consisting of the up-to-date test results on FRP ring-confined concrete in the literature is established, and it is used for proposing a new design-oriented stress-strain model for FRP ring-confined concrete. The accuracy and reliability of the new model are validated by comparing the test results presented in this paper with the predictions by the new model. The comparisons show that the new model provides close predictions with test results.