Journal
ENGINEERING FRACTURE MECHANICS
Volume 165, Issue -, Pages 57-71Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2016.08.020
Keywords
Three-point-bend (3-p-b) test; Maximum aggregate size; Peak load; Tensile strength; Fracture toughness
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Funding
- Australian Research Council
- National Natural Science Foundation of China [51209094]
- Science and Technology Planning Project of Zhengzhou City of China [153PKJGG111]
- UWA
- Tsinghua University
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Comprehensive fracture tests of notched three-point-bending (3-p-b) concrete specimens have recently been reported by caglar and Sener (2016), which covers specimen size W from 40 to 500 mm, notch/W ratio = 0, 0.02 to 03. The authors discussed size effect models from Bazant (1991 and 2013), Carpinteri (1995), Karihaloo (1999 and 2003) and Hu and Duan (2003 and 2006), and made a specific comparison between Bazant and Hu and Duan models. This study presents in-depth systematic analyses of the results from caglar and Sener (2016) under different sample grouping conditions. We would like to show that reliable tensile strength and fracture toughness can be obtained conveniently from notched 3-p-b results, although they have not been determined in the publication by caglar and Sener (2016). This is significant as neither direct tensile tests nor fracture toughness tests can be easily performed for concrete. Size effect models compared in the publication by caglar and Sener (2016) are also discussed for a better understanding of concrete fracture. (C) 2016 Elsevier Ltd. All rights reserved.
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