Design oriented approaches for FRP retrofitted RC columns and case study of TEC2007 example

ÖZCAN O., BİNİCİ B., Özcebe G.

2nd Asia-Pacific Conference on FRP in Structures, APFIS 2009, Seoul, South Korea, 9 - 11 December 2009, pp.545-548 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Seoul
  • Country: South Korea
  • Page Numbers: pp.545-548
  • Keywords: Design, Flexural behaviour, FRPs, Rectangular RC columns, Strengthening, Turkish Earthquake Code
  • TED University Affiliated: No


© 2009 International Institute for FRP in Construction (IIFC).Enhancing ductility and shear capacity of rectangular RC columns by means of FRPs has been accepted as a beneficial retrofitting technique and the implementation of the fiber based materials has been permitted in structural retrofitting codes since the last decades. Herein, regarding the retrofitting design guidelines; the seismic performance of flexure dominated RC columns has been evaluated by overseeing safety regulations. Thus, taking the Turkish Earthquake Code (TEC2007) in concern as a pilot study, this research focuses on the assessment of FRP strengthened RC columns accordingly and asserts new simple design equations based on inter-story drifts and ultimate compressive strains for FRP strengthened RC columns. For both of the design methods, the ratios of FRP confinement, axial load and longitudinal reinforcement were utilized since these parameters were observed to be the most emphatic ones according to the generated column database including 28 FRP strengthened RC columns. The obtained results revealed that the design equations for inter-story and ultimate compressive strain based approaches came up with close results with each other. Moreover, the ultimate concrete strain based approach provided more realistic results than inter-story drift based approach since standard section analysis was employed with plastic hinge model in order to calculate ultimate drift levels for FRP confined columns. In advance, both of the approaches can be adapted to similar FRP retrofitting guidelines to respond to the needs of engineers for easier and quicker FRP strengthened column design methods.