SIZE EFFECT IN PUNCHING SHEAR FAILURE OF SLABS.

Zdenek P Bazant*, Zhiping Cao

*Corresponding author for this work

Research output: Contribution to journalArticle

86 Scopus citations

Abstract

Punching shear tests of geometrically similar reinforced concrete slabs of different sizes are carried out. The nominal shear stress at failure is not constant, as assumed in the current design formulas, but decreases as the slab size increases. The observed size effect in punching shear strength is approximately described by an improved design formula which uses the size-effect law for brittle failures due to distributed cracking. Applicability of this law is further supported by measurements of deflection diagrams, which revealed that the post-peak load decline becomes steeper as the slab size increases. Previous test data by various investigators are also analyzed collectively as one large set.

Original languageEnglish (US)
Pages (from-to)44-53
Number of pages10
JournalACI Structural Journal
Volume84
Issue number1
StatePublished - Jan 1 1987

ASJC Scopus subject areas

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

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