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Direct shear tests on sand / R. A. Jewell in Géotechnique, Vol. 39 N°2 (Juin 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°2 (Juin 1989) . - pp. 309 –322 Titre : Direct shear tests on sand Type de document : texte imprimé Auteurs : R. A. Jewell, Auteur Année de publication : 2007 Article en page(s) : pp. 309 –322 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Plasticity  Granular  materials  Shear  tests  Friction  Strains Résumé : Experimental data from unreinforced direct shear tests on sand are presented to show the influence of the boundary conditions on the test measurements. The data and the theoretical considerations of the loading in the test show that a symmetrical direct shear test arrangement is preferable. A new method of analysis for the direct shear test is introduced based on the relationship between the sand shearing resistance and dilatancy. The analysis provides an independent check on the conventional analyses and on the consistency of the data from direct shear tests. The conclusion is that the symmetrical direct shear test is an effective method for the measurement of the plane strain and direct shear angles of friction for sand and the angle of dilation, at the density and stress level tested. The measured plane strain shearing resistance corresponds closely with the minimum value with respect to strength anisotropy. A simple modification for the standard laboratory direct shear apparatus and suggestions for the analysis of standard test data are recommended. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.2.309 [article] Direct shear tests on sand [texte imprimé] / R. A. Jewell, Auteur . - 2007 . - pp. 309 –322. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°2 (Juin 1989) . - pp. 309 –322 Mots-clés : Plasticity  Granular  materials  Shear  tests  Friction  Strains Résumé : Experimental data from unreinforced direct shear tests on sand are presented to show the influence of the boundary conditions on the test measurements. The data and the theoretical considerations of the loading in the test show that a symmetrical direct shear test arrangement is preferable. A new method of analysis for the direct shear test is introduced based on the relationship between the sand shearing resistance and dilatancy. The analysis provides an independent check on the conventional analyses and on the consistency of the data from direct shear tests. The conclusion is that the symmetrical direct shear test is an effective method for the measurement of the plane strain and direct shear angles of friction for sand and the angle of dilation, at the density and stress level tested. The measured plane strain shearing resistance corresponds closely with the minimum value with respect to strength anisotropy. A simple modification for the standard laboratory direct shear apparatus and suggestions for the analysis of standard test data are recommended. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.2.309