[article] 
inJournal of engineering mechanics > Vol. 135 N°2 (Février 2009) . - pp. 85-92

Titre :	Random lattice-particle simulation of statistical size effect in quasi-brittle Structures failing at crack initiation
Type de document :	texte imprimé
Auteurs :	Peter Grassl, Auteur ; Zdenek P. Bazant, Auteur
Article en page(s) :	pp. 85-92
Note générale :	Mécanique appliquée
Langues :	Anglais (eng)
Mots-clés :	Concrete Material properties Size effect Cracking Statistics Structural reliability.
Résumé :	The modeling of statistical size effect of concrete structures that fail at crack initiation is studied, with special attention to the interaction between the autocorrelation length and the size of the failure zone. The mechanical failure of concrete is modeled by a network of axial springs with degrading stiffness. The heterogeneity of concrete is idealized by spatial variation of the tensile strength and fracture energy. As an example, the direct tensile test in plane stress, with the size range of 1:20, is simulated. Furthermore, simulations of a four-point bending test with varying bending span are compared to the experimental results reported in the literature. The interaction of the autocorrelation length and the size of the failure zone is identified as a key parameter for the modeling of statistical size effect
DEWEY :	620.1
ISSN :	0733-9399
En ligne :	http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...]

[article] Random lattice-particle simulation of statistical size effect in quasi-brittle Structures failing at crack initiation [texte imprimé] / Peter Grassl, Auteur ; Zdenek P. Bazant, Auteur . - pp. 85-92.
Mécanique appliquée
Langues : Anglais (eng)
in Journal of engineering mechanics > Vol. 135 N°2 (Février 2009) . - pp. 85-92

Mots-clés :	Concrete Material properties Size effect Cracking Statistics Structural reliability.
Résumé :	The modeling of statistical size effect of concrete structures that fail at crack initiation is studied, with special attention to the interaction between the autocorrelation length and the size of the failure zone. The mechanical failure of concrete is modeled by a network of axial springs with degrading stiffness. The heterogeneity of concrete is idealized by spatial variation of the tensile strength and fracture energy. As an example, the direct tensile test in plane stress, with the size range of 1:20, is simulated. Furthermore, simulations of a four-point bending test with varying bending span are compared to the experimental results reported in the literature. The interaction of the autocorrelation length and the size of the failure zone is identified as a key parameter for the modeling of statistical size effect
DEWEY :	620.1
ISSN :	0733-9399
En ligne :	http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...]