Novel fiber-reinforced polymer cross wrapping strengthening technique: A comparative study. Issue 5 (April 2020)

• Record Type: Journal Article
• Authors: Zeng, Jun-Jie; Duan, Zhi-Jian; Guo, Yong-Chang; Xie, Zhi-Hong; Li, Li-Juan
• Is Part Of: Advances in structural engineering. Volume 23:Issue 5(2020)
• Page Start: 979
• Page End: 996
• Publication Date: 2020-04
• Subjects: confinement -- cross helical wrapping -- fiber-reinforced polymer -- fiber-reinforced polymer–confined concrete -- partial wrapping strengthening technique -- stress–strain model; Structural engineering -- Periodicals; Construction, Technique de la; Structural engineering; Periodicals; 624.1
• DOI: 10.1177/1369433219884451
• Languages: English
• ISSNs: 1369-4332

Abstract

This article presents a comparative study on behavior of fiber-reinforced polymer–confined concrete in axially loaded circular columns strengthened using three different fiber-reinforced polymer partial wrapping strengthening schemes: the fiber-reinforced polymer ring wrapping, the fiber-reinforced polymer strip helical wrapping, and the novel fiber-reinforced polymer strip cross helical wrapping. The test results show that at an identical confinement ratio, the strength enhancement efficiency of the fiber-reinforced polymer strip helical wrapping is slightly weaker than those of the other two strengthening schemes, while the strain enhancement efficiency of the fiber-reinforced polymer strip helical wrapping is the strongest among the three strengthening schemes. An analysis-oriented stress–strain model is proposed for the confined concrete with fiber-reinforced polymer partial wrapping, and the comparisons show that the model is capable to provide satisfactory predictions on stress–strain behavior of confined concrete with fiber-reinforced polymer partial wrapping.