Behaviour of reinforced concrete beams detailed with shear in compliance with compressive force path method

In order to explain shear behaviour of reinforced concrete (RC) beams, compressive force path (CFP) method has been developed. Four types of behaviour of RC beams are identified by this method on the basis of shear-span to depth (a/d) ratio and shear designing and detailing guidelines are provided. The CFP method is attempted to be used by this paper as a practical tool for shear designing of RC beams, particularly for Type II (2< a/d <5) and Type III (1< a/d <2) behaviours. In order to validate the method on the basis of behaviour and failure mechanism, eleven RC beams have been tested up to failure under four-point bending. The CFP method better estimates the amount of shear sustained by the concrete (Vc) as shown by the results, and furthermore, it better predicts the actual shear behaviour of the beam, in comparison to American Concrete Institute (ACI) code approach. The experimental loads attained by both CFP and ACI models have been found to be comparable in terms of failure load predictions, except for a/d ratio less and equal to 3.5. However, in terms of undesirable shear mode, particularly for a/d ratio less than 4.44, most of the beams designed according to CFP method failed.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 13-30
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01497396
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 31 2013 11:49AM