Justification of ACI 446 code provisions for shear design of reinforced concrete beams

Zdenek P. Bažant*, Qiang Yu, Walter Gerstle, James Hanson, J. Woody Ju

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

60 Scopus citations


Due to a relatively large amount of experimental evidence and recent scientific advances, it is now-generally recognized that, to ensure adequate safety margins, the size effect for designing reinforced concrete beams against shear failure must be incorporated into ACI code provisions. A purely empirical approach is impossible because the available test data, mostly obtained on small beams, need to be extrapolated to much larger beams for which tests are scant or nonexistent. Arguments for an improved code formulation are summarized, and verification by a database compiled by Joint ACI-ASCE Committee 445 is reviewed.

Original languageEnglish (US)
Pages (from-to)601-610
Number of pages10
JournalACI Structural Journal
Issue number5
StatePublished - Sep 2007


  • Reinforced concrete
  • Shear failure
  • Size effect

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction


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