Early-age shear strength of reinforced concrete beams

Surendra P. Shah, R. A. Miller, T. E. Virding

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


A study was conducted to determine if the current design formulas can adequately predict the capacity of reinforced concrete beams tested at early ages and to determine the effectiveness of stirrups in young beams. Three sets of reinforced concrete beams were tested with the main variables being beam age and stirrup spacinq. It was found that the ACI-318 ultimate strength design method provides a lower bound to flexural strength of young reinforced concrete beams. For beams failing in shear, however the current code provisions appear unsatisfactory. For example, the contribution of shear reinforcement was observed to be less than that predicted by the code when beams failed in shear at early ages. A change in mode of failure was often observed at early ages and the ductility of young reinforced concrete beams was less than that for the 28 day old beams.

Original languageEnglish (US)
Title of host publicationProperties of Concrete at Early Ages
PublisherAmerican Concrete Institute
Number of pages22
ISBN (Electronic)9780870317231
StatePublished - Oct 1 1986

Publication series

NameAmerican Concrete Institute, ACI Special Publication
ISSN (Print)0193-2527


  • Age-strength relation
  • Beams (supports)
  • Ductility
  • Flexural strength
  • Shear strength
  • Stirrups

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)


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