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ACI SP-134

Concrete Design Based on Fracture Mechanics

Organization:
ACI - American Concrete Institute
Year: 1992

Abstract: Introduction
It has long been known that ultimate loads of concrete structures exhibit size effect. The classical explanation has been Weibull's weakest-link theory which takes into account the random nature of concrete strength [1,2,3,4,5]. However, for reasons given elsewhere [6] and briefly explained in the Appendix, it now appears that the statistical theory does not suffice to describe the essence of the size effect observed in brittle failures of reinforced concrete structures and plays only a secondary role. The main mechanism of the size effect in this type of failure is deterministic rather than statistical, and is due to the release of the stored energy of the structure into the front of the cracking zone or fracture. This phenomenon is properly described by fracture mechanics in its recently developed nonlinear formulation which takes into account the distributed nature of cracking at the fracture front.
The purpose of this review paper is to summarize the existing evidence and also present some recent experimental results obtained at Northwestern University.
URI: https://yse.yabesh.ir/std/handle/yse/196354
Subject: Beams (supports)
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    ACI SP-134

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contributor authorACI - American Concrete Institute
date accessioned2017-09-04T18:13:22Z
date available2017-09-04T18:13:22Z
date copyright01/01/1992
date issued1992
identifier otherHEVHCAAAAAAAAAAA.pdf
identifier urihttps://yse.yabesh.ir/std/handle/yse/196354
description abstractIntroduction
It has long been known that ultimate loads of concrete structures exhibit size effect. The classical explanation has been Weibull's weakest-link theory which takes into account the random nature of concrete strength [1,2,3,4,5]. However, for reasons given elsewhere [6] and briefly explained in the Appendix, it now appears that the statistical theory does not suffice to describe the essence of the size effect observed in brittle failures of reinforced concrete structures and plays only a secondary role. The main mechanism of the size effect in this type of failure is deterministic rather than statistical, and is due to the release of the stored energy of the structure into the front of the cracking zone or fracture. This phenomenon is properly described by fracture mechanics in its recently developed nonlinear formulation which takes into account the distributed nature of cracking at the fracture front.
The purpose of this review paper is to summarize the existing evidence and also present some recent experimental results obtained at Northwestern University.
languageEnglish
titleACI SP-134num
titleConcrete Design Based on Fracture Mechanicsen
typestandard
page179
statusActive
treeACI - American Concrete Institute:;1992
contenttypefulltext
subject keywordsBeams (supports)
subject keywordsbending
subject keywordsCracking (fracturing)
subject keywordscvclic loads
subject keywordsfailure
subject keywordsfinite element method
subject keywordsfracture mechanics
subject keywordsmicrocracking
subject keywordsmodels
subject keywordsreinforced concrete
subject keywordsslabs
subject keywordsstresses
subject keywordsstructures
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