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Size-independent fracture energy in plain concrete beams using tri-linear model
- Source :
-
Construction & Building Materials . Jul2011, Vol. 25 Issue 7, p3051-3058. 8p. - Publication Year :
- 2011
-
Abstract
- Abstract: The boundary effect or the size effect on the fracture properties of concrete has been studied assuming a bi-linear model for the distribution of local fracture energy concept. Boundary effect is observed not only near the back boundary but also near the notch tip, where a fictitious boundary seems to exist, separating the linear and non-linear fracture zones. In this paper a tri-linear function is assumed for the local fracture energy distribution along the ligament and expressions relating RILEM fracture energy and the size-independent fracture energy are developed. Transition ligament length measurements based on the acoustic emission (AE) histogram of events are used to obtain size-independent fracture energy. Length of the fracture process zone is identified in the AE histogram and compared with the value obtained from softening beam model. There seems to be a good agreement between the results. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09500618
- Volume :
- 25
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Construction & Building Materials
- Publication Type :
- Academic Journal
- Accession number :
- 59641111
- Full Text :
- https://doi.org/10.1016/j.conbuildmat.2011.01.003