Stress-strain behaviour of FRP-confined concrete in eccentrically-loaded circular columns

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Fibre-reinforced polymer (FRP) jacketing/wrapping has become a widely accepted technique for strengthening/retrofitting reinforced concrete (RC) columns. Although extensive research has been conducted on FRP-confined concrete columns under concentric compression, leading to many stress-strain models, the applicability of these concentric-loading (CL) stress-strain models in the analysis of columns under eccentric loading has not been properly clarified. This paper presents an in-depth investigation into this problem using an advanced three-dimensional (3D) finite element (FE) approach. The axial stress distributions and the stress-strain responses of FRP-confined concrete in circular columns under eccentric compression are examined using the FE results. It is shown that the stress-strain response of concrete varies greatly over the section and the direct use of a single CL stress-strain model for the entire section in the analysis of eccentrically-loaded columns may lead to significant errors, especially for the prediction of ultimate deformation/ductility. The paper also shows that a stress-strain model for the confined concrete at the extreme compression fibre of the section provides a relatively simple and much more accurate option for the analysis of eccentrically-loaded columns.

Original languageEnglish
Title of host publicationProceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
EditorsJ.G. Dai, J.G. Teng
PublisherDepartment of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University
Pages251-257
Number of pages7
ISBN (Electronic)9789881448026
Publication statusPublished - 1 Jan 2016
Event8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016 - Hong Kong, China
Duration: 14 Dec 201616 Dec 2016

Publication series

NameProceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016

Conference

Conference8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
CountryChina
CityHong Kong
Period14/12/1616/12/16

Keywords

  • Column
  • Concrete
  • Confinement
  • Eccentric loading
  • Finite element analysis
  • FRP
  • Stress-strain model

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Polymers and Plastics

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