@inproceedings{7bd7e59863294b0f89ec82dfc8ffd693,
title = "Cyclic stress-strain model for steel rebars in FRP-confined concrete considering buckling effect",
abstract = "Buckling of steel reinforcement usually causes a sudden loss of the load-carrying capacity and leads to the ultimate state of conventional reinforced concrete (RC) columns. However, it behaves differently in fiber-reinforced polymer (FRP)-confined RC columns due to the lateral confinement effect of FRP. This paper presents a theoretical study into the buckling behavior of longitudinal steel reinforcing bars embedded in FRP-confined concrete subjected to cyclic axial compression. An empirical monotonic compressive stress-strain model for laterally supported reinforcing bars considering the buckling effect, which was proposed in the authors{\textquoteright} previous study, was extended to a cyclic stress-strain model following the Menegotto-Pinto model accounting for the cyclic loops. The cyclic stress-strain models for laterally supported reinforcing bars as well as FRP-confined plain concrete were then implemented into the OpenSees platform to simulate the cyclic compressive behaviour FRP-confined RC columns and validated through comparisons with test results. The proposed cyclic stress-strain model for laterally supported reinforcing bars can serve as a fundamental law for the modelling of seismic behaviour of FRP-strengthened RC columns, especially for those with sparely- spaced transverse ties where buckling of reinforcing bars becomes a significant concern.",
keywords = "Bar buckling, Cyclic model, FRP confinement, OpenSees, Stress-strain model",
author = "Bai, {Y. L.} and Dai, {J. G.}",
year = "2016",
month = jan,
day = "1",
language = "English",
series = "Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016",
publisher = "Department of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University",
pages = "990--993",
editor = "J.G. Dai and J.G. Teng",
booktitle = "Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016",
note = "8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016 ; Conference date: 14-12-2016 Through 16-12-2016",
}