ULTIMATE STRENGTH OF ECCENTRICALLY LOADED CONCRETE COLUMNS REINFORCED WITH CFRP BARS

Steel reinforced concrete columns have been studied extensively and design equations developed, which form the basis of current design guidelines. However, these equations may need modifications before they are used in design of the columns reinforced with FRP bars. FRP materials behave elasticially up to their ultimate strength with very little plastic deformation. Consequently, the serviceability and strength requirements should be examined for FRP reinforced concrete columns. This paper presents the summary of the on-going experimental and analytical studies on the ultimate strength behavior of columns reinforced with Carbon Fiber Reinforced Plastics (CFRP) bars. Eight concrete columns 15 cm x 15 cm x 2.54 m reinforced with four 7.5 mm CFRP bars were tested under axial loads with varying eccentricities. The columns were instrumented to measure the strains and lateral displacements throughout the tests. Data regarding the failure modes, crack formations and ultimate strength were collected to investigate the behavior of concrete members reinforced with CFRP bars. Based on the experimental data, axial load-moment interaction relationship was developed for the columns and compared with the theoretical relationship calculated based on strain compatibility. (A) For the covering abstract see ITRD E104933.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 209-16

Subject/Index Terms

Filing Info

  • Accession Number: 00793614
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-921303-64-5
  • Files: ITRD
  • Created Date: Jun 15 2000 12:00AM