SIZE EFFECT OF SHEAR FAILURE IN PRESTRESSED CONCRETE BEAMS.

Zdenek P Bazant*, Cao Zhiping Cao

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

It is shown that the size effect predicted by dimensional analysis of fracture mechanics of failures due to progressive distributed microcracking agrees with the test data existing in the literature better than the presently used strength (ultimate load) criterion, which exhibits no size effect, and better than the linear elastic fracture mechanics criterion, which exhibits much too strong a size effect. Based on the analysis of over 200 test results from the literature, a simple design formula involving the proper size effect is proposed. Comparison with other existing formulas, including the one presently used in the ACI Building Code, reveals an appreciable reduction in the coefficient of variation of the deviations from test data.

Original languageEnglish (US)
Pages (from-to)260-268
Number of pages9
JournalJournal of the American Concrete Institute
Volume83
Issue number2
StatePublished - Mar 1 1986

ASJC Scopus subject areas

  • Engineering(all)

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