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Media type:
E-Article
Title:
Biaxial flexural strength of concrete by two different methods
Contributor:
Kim, Jihwan;
Yi, Chongku;
Zi, Goangseup
Published:
Thomas Telford Ltd., 2012
Published in:
Magazine of Concrete Research, 64 (2012) 12, Seite 1057-1065
Language:
English
DOI:
10.1680/macr.11.00178
ISSN:
0024-9831;
1751-763X
Origination:
Footnote:
Description:
The biaxial flexural strength of a concrete panel can be evaluated by two different methods: the centrally loaded round panel test (ASTM C 1150) and the recently proposed biaxial flexure test (BFT). Twenty-six tests, with 13 specimens for each test method, were performed to verify the effect of the different test methods on the biaxial flexural strength of concrete. A finite-element analysis of the specimens of two test methods showed that the biaxial flexure test set-up allows a larger area with a uniform biaxial stress on the bottom surface around the centre of the specimen than the ASTM C 1550 set-up, indicating that the difference in the test results is attributable to the volume effects. The test results showed that the biaxial flexure test method gives a more reliable biaxial flexural strength with a 25% lower coefficient of variation than that from the ASTM C 1550.