Fracture energy of concrete: Its definition and determination from size effect tests

Z. P. Bazant; P. A. Pfeiffer

Fracture energy of concrete: Its definition and determination from size effect tests

Z. P. Bazant, P. A. Pfeiffer

Civil and Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

5 Scopus citations

Abstract

The previously derived size effect law for concrete may be used to define the material fracture parameters in a less ambiguous, size-independent manner. By exploiting the size effect law, the fracture characteristics can be defined for an extrapolated infinite specimen size, for which they must be independent of the specimen geometry. It is demonstrated experimentally that this definition yields less scattered results for the fracture energy than the existing methods. Three very different types of specimens, including three-point bent, edge-notched tension and eccentric compression specimens, are found to yield approximately the same fracture energy values. Furthermore, the R-curves calculated from the size effect measured for various types of specimens are found to have approximately the same final asymptotic values for very long crack lengths, although they differ very much for short crack lengths. Finally, certain refinements of the size effect law are discussed and their consequences pointed out, particularly with regard to the effect of aggregate size.

Original language	English (US)
Title of host publication	Concrete Durability
Subtitle of host publication	Proceedings of Katharine and Bryant Mather International Symposium
Editors	John M. Scanlon
Publisher	American Concrete Institute
Pages	89-109
Number of pages	21
ISBN (Electronic)	9780870315992
State	Published - Apr 1 1987
Event	Katharine and Bryant Mather International Symposium on Concrete Durability 1987 - Atlanta, United States Duration: Apr 27 1987 → May 1 1987

Publication series

Name	American Concrete Institute, ACI Special Publication
Volume	SP-100
ISSN (Print)	0193-2527

Conference

Conference	Katharine and Bryant Mather International Symposium on Concrete Durability 1987
Country/Territory	United States
City	Atlanta
Period	4/27/87 → 5/1/87

Funding

Financial support under Air Research Grant No. 83-00092, gratefully acknowledged.

Keywords

Concretes
Cracking (fracturing)
Energy
Failure
Mortars (material)
Statistical analysis

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

Cite this

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title = "Fracture energy of concrete: Its definition and determination from size effect tests",

abstract = "The previously derived size effect law for concrete may be used to define the material fracture parameters in a less ambiguous, size-independent manner. By exploiting the size effect law, the fracture characteristics can be defined for an extrapolated infinite specimen size, for which they must be independent of the specimen geometry. It is demonstrated experimentally that this definition yields less scattered results for the fracture energy than the existing methods. Three very different types of specimens, including three-point bent, edge-notched tension and eccentric compression specimens, are found to yield approximately the same fracture energy values. Furthermore, the R-curves calculated from the size effect measured for various types of specimens are found to have approximately the same final asymptotic values for very long crack lengths, although they differ very much for short crack lengths. Finally, certain refinements of the size effect law are discussed and their consequences pointed out, particularly with regard to the effect of aggregate size.",

keywords = "Concretes, Cracking (fracturing), Energy, Failure, Mortars (material), Statistical analysis",

author = "Bazant, {Z. P.} and Pfeiffer, {P. A.}",

note = "Funding Information: Financial support under Air Research Grant No. 83-00092, gratefully acknowledged. Publisher Copyright: {\textcopyright} 1987 American Concrete Institute. All rights reserved.; Katharine and Bryant Mather International Symposium on Concrete Durability 1987 ; Conference date: 27-04-1987 Through 01-05-1987",

year = "1987",

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language = "English (US)",

series = "American Concrete Institute, ACI Special Publication",

publisher = "American Concrete Institute",

pages = "89--109",

editor = "Scanlon, {John M.}",

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Bazant, ZP & Pfeiffer, PA 1987, Fracture energy of concrete: Its definition and determination from size effect tests. in JM Scanlon (ed.), Concrete Durability: Proceedings of Katharine and Bryant Mather International Symposium. American Concrete Institute, ACI Special Publication, vol. SP-100, American Concrete Institute, pp. 89-109, Katharine and Bryant Mather International Symposium on Concrete Durability 1987, Atlanta, United States, 4/27/87.

Fracture energy of concrete: Its definition and determination from size effect tests. / Bazant, Z. P.; Pfeiffer, P. A.
Concrete Durability: Proceedings of Katharine and Bryant Mather International Symposium. ed. / John M. Scanlon. American Concrete Institute, 1987. p. 89-109 (American Concrete Institute, ACI Special Publication; Vol. SP-100).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Bazant, Z. P.

AU - Pfeiffer, P. A.

PY - 1987/4/1

Y1 - 1987/4/1

N2 - The previously derived size effect law for concrete may be used to define the material fracture parameters in a less ambiguous, size-independent manner. By exploiting the size effect law, the fracture characteristics can be defined for an extrapolated infinite specimen size, for which they must be independent of the specimen geometry. It is demonstrated experimentally that this definition yields less scattered results for the fracture energy than the existing methods. Three very different types of specimens, including three-point bent, edge-notched tension and eccentric compression specimens, are found to yield approximately the same fracture energy values. Furthermore, the R-curves calculated from the size effect measured for various types of specimens are found to have approximately the same final asymptotic values for very long crack lengths, although they differ very much for short crack lengths. Finally, certain refinements of the size effect law are discussed and their consequences pointed out, particularly with regard to the effect of aggregate size.

AB - The previously derived size effect law for concrete may be used to define the material fracture parameters in a less ambiguous, size-independent manner. By exploiting the size effect law, the fracture characteristics can be defined for an extrapolated infinite specimen size, for which they must be independent of the specimen geometry. It is demonstrated experimentally that this definition yields less scattered results for the fracture energy than the existing methods. Three very different types of specimens, including three-point bent, edge-notched tension and eccentric compression specimens, are found to yield approximately the same fracture energy values. Furthermore, the R-curves calculated from the size effect measured for various types of specimens are found to have approximately the same final asymptotic values for very long crack lengths, although they differ very much for short crack lengths. Finally, certain refinements of the size effect law are discussed and their consequences pointed out, particularly with regard to the effect of aggregate size.

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KW - Cracking (fracturing)

KW - Energy

KW - Failure

KW - Mortars (material)

KW - Statistical analysis

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ER -

Fracture energy of concrete: Its definition and determination from size effect tests

Abstract

Publication series

Conference

Funding

Keywords

ASJC Scopus subject areas

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