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Reinforced high-strength concrete square columns confined by aramid FRP jackets -part I: experimental study

  • Wang, Yuan-Feng (School of Civil Engineering, Beijing Jiaotong University) ;
  • Ma, Yi-Shuo (School of Civil Engineering, Beijing Jiaotong University) ;
  • Wu, Han-Liang (Bridge Technology Research Center, Research Institute of Highway, Ministry of Transportation)
  • Received : 2010.05.27
  • Accepted : 2011.07.19
  • Published : 2011.11.25

Abstract

Although retrofitting and strengthening reinforced concrete (RC) columns by wrapping fiber reinforced polymer (FRP) composites have become a popular technique in civil engineering, the study on reinforced high-strength concrete (HSC) columns is still not sufficient. The objective of these companion papers is to investigate the mechanical properties of reinforced HSC square columns confined by aramid FRP (AFRP) jackets under concentric compressive loading. In the part I of these companion papers, an experiment was conducted on 54 confined RC specimens and nine unconfined plain specimens, the considered parameters were the concrete strength, the thickness of AFRP jackets, and the form of AFRP wrapping. The experimental process and results are presented in detail. Subsequently, some discussions on the confinement effect, failure modes, strength, and ductility of the columns are carried out.

Keywords

reinforcement;high-strength concrete (HSC);confined columns;fiber reinforced polymers (FRP);experimentation

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