Size effect tests of torsional failure of plain and reinforced concrete beams

Zdeněk P. Bažant*, Siddik Şener, Pere C. Prat

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


The current design code formulae for the torsional failure of plain or longitudinally reinforced beams exhibit no size effect, i.e. the failure of geometrically similar beams of different sizes is supposed to occur at the same nominal stress. Experiments on reduced-scale beams were carried out, and the results confirm that there is a significant size effect, such that the nominal stress at failure decreases as the beam size increases. This is found for both plain and longitudinally reinforced beams. The results are consistent with the recently proposed Bažant's size-effect law. However, the scatter of the results and the scope, and range limitations prevent it from being concluded that the applicability of this law is proven.

Original languageEnglish (US)
Pages (from-to)425-430
Number of pages6
JournalMaterials and Structures
Issue number6
StatePublished - Nov 1988

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science
  • Mechanics of Materials


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