Analytical model for CFRP strengthened circular RC column under elevated temperature

Raizal S.M. Rashid, Riyad S. Aboutaha

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

In order to increase the load carrying capacity and/or increase the service life of existing circular reinforced concrete bridge columns, Carbon Fiber Reinforced Polymer (CFRP) composites could be utilized. Transverse wrapping of circular concrete columns with CFRP sheets increases its axial and shear strengths. In addition, it provides good confinement to the concrete column core, which enhances the bending and compressive strength, as well as, ductility. Several experimental and analytical studies have been conducted on CFRP strengthened concrete cylinders/columns. However, there seem to be lack of thorough investigation of the effect of elevated temperatures on the response of CFRP strengthened circular concrete columns. A concrete confinement model that reflects the effects of elevated temperature on the mechanical properties of CFRP composites, and the efficiency of CFRP in strengthened concrete columns is presented. Tensile strength and modulus of CFRP under hot conditions and their effects on the concrete confinement are the primary parameters that were investigated. A modified concrete confinement model is developed and presented.

Original languageEnglish (US)
Pages (from-to)517-529
Number of pages13
JournalComputers and Concrete
Volume13
Issue number4
DOIs
StatePublished - Apr 2014

Keywords

  • CFRP
  • Circular concrete column
  • Confinement
  • Elevated temperature and humidity

ASJC Scopus subject areas

  • Computational Mechanics

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