Torsion of foundations embedded in a non-homogeneous soil with a weathered crust / R. K. N. D. Rajapakse in Géotechnique, Vol. 39 N°3 (Septembre 1989)  

Public ISBD [article]  inGéotechnique > Vol. 39 N°3 (Septembre 1989) . - pp. 485 –496 Titre : Torsion of foundations embedded in a non-homogeneous soil with a weathered crust Type de document : texte imprimé Auteurs : R. K. N. D. Rajapakse, Auteur ; A. P. S. Selvadurai, Auteur Année de publication : 2007 Article en page(s) : pp. 485 –496 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Shear modulus Foundations Stiffness Soil-structure interaction Torsion Footings Elasticity Résumé : The torsional response of rigid foundations embedded in a non-homogeneous elastic soil with a weathered crust is investigated. The shear modulus of the weathered crust is assumed to decrease linearly with depth and that of the underlying non-homogeneous soil increases linearly with depth. The problems related to both rigid circular and cylindrical foundations are examined by using an integral equation method based on displacement and traction Green's functions of the weathered non-homogeneous medium. Numerical solutions for torsional stiffness of rigid circular foundations are presented for different depths of embedment, gradients of shear modulus profile and depths of weathered crust. A closed form solution based on a simplified stress field in the soil is also developed to evaluate the torsional stiffness of a rigid cylindrical foundation. The torsional stiffness derived by using the approximate solution is compared with the rigorous solution based on exact Green's functions. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.3.485 [article] Torsion of foundations embedded in a non-homogeneous soil with a weathered crust [texte imprimé] / R. K. N. D. Rajapakse, Auteur ; A. P. S. Selvadurai, Auteur . - 2007 . - pp. 485 –496. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°3 (Septembre 1989) . - pp. 485 –496 Mots-clés : Shear modulus Foundations Stiffness Soil-structure interaction Torsion Footings Elasticity Résumé : The torsional response of rigid foundations embedded in a non-homogeneous elastic soil with a weathered crust is investigated. The shear modulus of the weathered crust is assumed to decrease linearly with depth and that of the underlying non-homogeneous soil increases linearly with depth. The problems related to both rigid circular and cylindrical foundations are examined by using an integral equation method based on displacement and traction Green's functions of the weathered non-homogeneous medium. Numerical solutions for torsional stiffness of rigid circular foundations are presented for different depths of embedment, gradients of shear modulus profile and depths of weathered crust. A closed form solution based on a simplified stress field in the soil is also developed to evaluate the torsional stiffness of a rigid cylindrical foundation. The torsional stiffness derived by using the approximate solution is compared with the rigorous solution based on exact Green's functions. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.3.485

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