Effect of geometric discontinuities on FRP strain efficiency in FRP-confined circular concrete-filled steel tubes

S. Q. Li, J. F. Chen, L. A. Bisby, Y. M. Hu, Jinguang Teng

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

Abstract

The confinement of concrete columns using FRP jackets/wraps has become a popular retrofitting technique. More recently, the benefit of FRP confinement of concrete-filled steel tubes has been also explored by researchers. Failure of such FRP-wrapped concrete-filled steel tubes is usually governed by rupture of the FRP in the hoop direction. However, the observed FRP hoop strain at failure is typically lower than the ultimate strain in a flat coupon test. Many factors contribute to this phenomenon, one of which is the geometrical discontinuities at the ends of FRP wraps. This paper examines the effect of these geometrical discontinuities on the hoop rupture strain of FRP wraps. Detailed finite element (FE) analyses conducted using both linear elastic and elastic-perfectly plastic adhesive constitutive models are presented. Comparison between the FE predictions and available test results shows that the strain efficiency predicted by FE analysis using an elastic-perfectly plastic adhesive model are in reasonable overall agreement with the test results.
Original languageEnglish
Title of host publicationAdvances in FRP Composites in Civil Engineering - Proceedings of the 5th International Conference on FRP Composites in Civil Engineering, CICE 2010
PublisherSpringer-Verlag Berlin Heidelberg
Pages595-598
Number of pages4
Publication statusPublished - 1 Jan 2011
Event5th International Conference on FRP Composites in Civil Engineering, CICE 2010 - Beijing, China
Duration: 27 Sep 201029 Sep 2010

Conference

Conference5th International Conference on FRP Composites in Civil Engineering, CICE 2010
CountryChina
CityBeijing
Period27/09/1029/09/10

ASJC Scopus subject areas

  • Surfaces and Interfaces

Cite this