Effect of column rectangularity on CFRP-strengthened RC flat plates


Magazine of Concrete Research, vol.63, no.7, pp.511-525, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 63 Issue: 7
  • Publication Date: 2011
  • Doi Number: 10.1680/macr.2011.63.7.511
  • Journal Name: Magazine of Concrete Research
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.511-525
  • TED University Affiliated: No


This study presents experimental and analytical research that focused on the behaviour of carbon-fibre-reinforced polymer (CFRP)-strengthened flat-slab specimens for punching shear enhancement. Seven 0.75-scale flat-slab specimens representing interior slab-column connections with different column aspect ratios varying from 1 to 3 were tested. The results revealed that increasing column rectangularity had a detrimental effect on column punching strength of all specimens. A strength increase of at least 30% was obtained for the CFRP retrofitted specimens compared with the companion reference specimen. Three-dimensional finite-element models were successful in providing reasonable estimates of load-deformation behaviour and strains. Based on these results, CFRP strains at failure and the punching failure mechanism are discussed.