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Experimental analyses of the behaviour of saturated granular materials during axisymmetric proportional strain paths / Mohamad Jrad in European journal of environmental and civil engineering, Vol. 16 N° 1 (Janvier 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 N° 1 (Janvier 2012) . - pp. 111-120 Titre : Experimental analyses of the behaviour of saturated granular materials during axisymmetric proportional strain paths Type de document : texte imprimé Auteurs : Mohamad Jrad, Auteur ; Beena Sukumaran, Auteur ; Ali Daouadji, Auteur Année de publication : 2012 Article en page(s) : pp. 111-120 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Triaxial  test  Proportional  strain  test  Instability  Second  order  work  criterion  Static  liquefaction Résumé : Instability of granular materials is usually studied using undrained triaxial compression tests or constant shear drained tests. These tests are usually performed on fully undrained or fully drained samples respectively. In this paper, experimental investigations of the behaviour of loose saturated sand under proportional strain paths performed by imposing a partial drainage condition are presented. Partially drained conditions observed in situ are due to potential pore pressure variations. Different drainage condition changes can lead to different stress–strain responses, and it is shown that the strength mobilisation for expansive drainage conditions is lower than what is usually obtained for undrained conditions. The stability analyses based on experimental results have shown that the second order work criterion, rewritten using the relevant control parameters, is a good tool to investigate the onset of instability. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.666900 [article] Experimental analyses of the behaviour of saturated granular materials during axisymmetric proportional strain paths [texte imprimé] / Mohamad Jrad, Auteur ; Beena Sukumaran, Auteur ; Ali Daouadji, Auteur . - 2012 . - pp. 111-120. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 N° 1 (Janvier 2012) . - pp. 111-120 Mots-clés : Triaxial  test  Proportional  strain  test  Instability  Second  order  work  criterion  Static  liquefaction Résumé : Instability of granular materials is usually studied using undrained triaxial compression tests or constant shear drained tests. These tests are usually performed on fully undrained or fully drained samples respectively. In this paper, experimental investigations of the behaviour of loose saturated sand under proportional strain paths performed by imposing a partial drainage condition are presented. Partially drained conditions observed in situ are due to potential pore pressure variations. Different drainage condition changes can lead to different stress–strain responses, and it is shown that the strength mobilisation for expansive drainage conditions is lower than what is usually obtained for undrained conditions. The stability analyses based on experimental results have shown that the second order work criterion, rewritten using the relevant control parameters, is a good tool to investigate the onset of instability. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.666900