NDLI: Experimental study of creep-damage coupling in concrete by acoustic emission technique

Content Provider	Springer Nature Link
Author	Saliba, J. Loukili, A. Grondin, F. Regoin, J. P.
Copyright Year	2012
Abstract	In order to design reliable concrete structures, prediction of long term behaviour of concrete is important by considering a coupling between creep and damage. An experimental investigation on the fracture properties of concrete beams submitted to creep bending tests with high levels of sustained load is reported. The influence of creep on the residual capacity and the fracture energy of concrete is studied. The progression of fracture is followed by the measurement of the crack mouth opening displacement during a three-point bending test. The sustained loading seems to increase the flexural strength of concrete, probably because of the consolidation of the hardened cement paste. The acoustic emission (AE) technique is used to perform the characterization of the influence of creep on the crack development. Results give wealth information on the fracture process zone (FPZ) and the propagation of the crack. A decrease in the amplitude distribution of AE hits is observed in the post-peak region for creep specimens. The width of the FPZ also decreases in this later indicating that the material has a more brittle behaviour which may be due to the development of microcracking under creep and the prestressing of the upper zone of the beam.
Starting Page	1389
Ending Page	1401
Page Count	13
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	45
Issue Number	9
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-02-10
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Acoustic emission technique Bending creep test Concrete Fracture process zone Theoretical and Applied Mechanics Operating Procedures, Materials Treatment Materials Science Structural Mechanics Building Materials Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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