Assessment of axial behavior of circular HPFRCC members externally confined with FRP sheets

Ugur Demir*, Yusuf Sahinkaya, Medine Ispir, Alper Ilki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The aim of this paper is to identify the axial behavior characteristics of FRP (fiber reinforced polymer) confined circular HPFRCC (high performance fiber reinforced cementitious composite) members under compression. The test program comprised of 24 circular specimens with an average compressive strength of 102.7 MPa, including 21 carbon FRP (CFRP) confined (2, 4, 6, 8 and 10 layers) and three unconfined specimens. Transverse confinement generated by external FRP sheets resulted with a remarkable enhancement in axial strength and deformability, which is extremely important to resist seismic actions. The higher was the thickness of FRP confinement, the larger was the ultimate strain (εcu) and peak compressive strength (f' cc) of externally confined HPFRCC. When compared to FRP confined conventional concrete, different axial and lateral deformation characteristics were seen in FRP jacketed HPFRCC members. Higher strength and steel fiber presence in HPFRCC limited the lateral deformations which resulted with reduced strain efficiency with respect to conventional concrete. After presenting the experimental work, performance and accuracy of several available models proposed for predicting the axial behavior of FRP jacketed concrete were evaluated in a comparative manner.

Original languageEnglish
Article number138
Issue number2
Publication statusPublished - 31 Jan 2018

Bibliographical note

Publisher Copyright:
© 2018 by the authors.


  • Concrete
  • Confinement
  • Ductility
  • FRP


Dive into the research topics of 'Assessment of axial behavior of circular HPFRCC members externally confined with FRP sheets'. Together they form a unique fingerprint.

Cite this