Uniaxial tension behavior of reinforced concrete members strengthened with carbon fiber sheets

Khalid Farah, Yasuhiko Sato

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A two-dimensional (2D) nonlinear numerical analysis code by using the rigid body spring method (RBSM) was developed by the writers at Hokkaido University to simulate the behavior of reinforced concrete (RC) members strengthened with fiber-reinforced polymer (FRP) sheets. The code supports the nonlinear constitutive laws for the different materials and nonlinear bond stress-slip relationships for steel-concrete and FRP sheet-concrete interfaces. This study uses the aforementioned code to examine the uniaxial tension behavior of RC members strengthened with carbon fiber sheets (CFS). Experimental results are compared with relevant numerical outputs to validate the model and confirm its ability to simulate the experimental observations. This study also assesses the influence of the amount of CFS strengthening on the tension-stiffening behavior of strengthened members. Finally, this research also suggests new analytical expressions for the average stress-strain relationships of concrete and steel in tension in the presence of stiffening contributions from internal steel reinforcement bars and externally bonded CFS reinforcement.

Original languageEnglish
Pages (from-to)215-228
Number of pages14
JournalJournal of Composites for Construction
Volume15
Issue number2
DOIs
Publication statusPublished - 2011 Mar 1

Keywords

  • Bond stress-slip
  • Bonding
  • CFS
  • Fiber reinforced polymer
  • RBSM analysis
  • Reinforced concrete
  • Reinforcement
  • Sheets
  • Stiffening
  • Strengthening
  • Tension
  • Tension stiffening

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Mechanical Engineering

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