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Cohesive versus overlapping crack model for a size effect analysis of RC elements in bending

Carpinteri, Alberto and Corrado, Mauro and Paggi, Marco and Mancini, Giuseppe Cohesive versus overlapping crack model for a size effect analysis of RC elements in bending. In: Design, Assessment and Retrofitting of RC Structures. Taylor & Francis, pp. 655-663. ISBN 9780415446167 (2007)

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The well-known Cohesive Crack Model describes strain localization with a softening stress variation in concrete members subjected to tension. An analogous behaviour is also observed in compression, when strain localization takes place in a damaged zone and the stress reaches the compressive strength with surface energy dissipation. In the present paper, we propose the new concept of Overlapping Crack Model, which is analogous to the cohesive one and permits to simulate material compenetration. The two aforementioned elementary models are merged into a more complex algorithm able to describe both cracking and crushing growths during loading processes in RC members. A numerical procedure based on elastic coefficients is developed, taking into account the proposed constitutive laws in tension and compression. With this algorithm, it is possible to effectively capture the flexural behaviour of RC beams by varying the reinforcement percentage and/or the beam depth

Item Type: Book Section
Additional Information: Second volume of the Proceedings of the 6th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-6, Catania, Italy, 17-22 June 2007)
Subjects: T Technology > TJ Mechanical engineering and machinery
Research Area: Computer Science and Applications
Depositing User: Prof Marco Paggi
Date Deposited: 25 Nov 2013 14:45
Last Modified: 09 Oct 2014 09:20
URI: http://eprints.imtlucca.it/id/eprint/1953

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