Documents disponibles écrits par cet auteur

Dynamic stress concentrations in lined twin tunnels within fluid-saturated soil / Seyyed M. Hasheminejad in Journal of engineering mechanics, Vol. 134 N° 7 (Juillet 2008) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 134 N° 7 (Juillet 2008) . - pp.542-554 Titre : Dynamic stress concentrations in lined twin tunnels within fluid-saturated soil Type de document : texte imprimé Auteurs : Seyyed M. Hasheminejad, Auteur ; Reza Avazmohammadi, Auteur Année de publication : 2010 Article en page(s) : pp.542-554 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Stress  Tunnels  Saturated  soils  Three-dimensional  models. Résumé : An exact analysis for three-dimensional dynamic interaction of monochromatic seismic plane waves with two lined circular parallel tunnels within a boundless fluid-saturated porous elastic medium is presented. The novel features of Biot dynamic theory of poroelasticity along with the appropriate wave field expansions, the pertinent boundary conditions, and the translational addition theorems for cylindrical wave functions are employed to obtain a closed-form solution in the form of infinite series. The analytical results are illustrated with numerical examples in which two identical tunnels, lined with concrete and embedded within water-saturated soils of distinct frame properties (i.e., soft or stiff soils), are insonified by plane fast compressional or shear waves at end-on incidence. The basic dynamic field quantities such as the hoop and axial stress amplitudes are evaluated and discussed for representative values of the parameters characterizing the system. The effects of formation material type, angle of incidence, incident wave frequency, and the proximity of the two tunnels on the liner stresses are examined. Particular attention is paid to the influence of bonding and drainage conditions at the liner/soil interface on the dynamic stress concentrations. Limiting cases are considered and good agreement with the solutions available in the literature is obtained. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v134/i7/p542_s1?isAuthorized=no [article] Dynamic stress concentrations in lined twin tunnels within fluid-saturated soil [texte imprimé] / Seyyed M. Hasheminejad, Auteur ; Reza Avazmohammadi, Auteur . - 2010 . - pp.542-554. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 134 N° 7 (Juillet 2008) . - pp.542-554 Mots-clés : Stress  Tunnels  Saturated  soils  Three-dimensional  models. Résumé : An exact analysis for three-dimensional dynamic interaction of monochromatic seismic plane waves with two lined circular parallel tunnels within a boundless fluid-saturated porous elastic medium is presented. The novel features of Biot dynamic theory of poroelasticity along with the appropriate wave field expansions, the pertinent boundary conditions, and the translational addition theorems for cylindrical wave functions are employed to obtain a closed-form solution in the form of infinite series. The analytical results are illustrated with numerical examples in which two identical tunnels, lined with concrete and embedded within water-saturated soils of distinct frame properties (i.e., soft or stiff soils), are insonified by plane fast compressional or shear waves at end-on incidence. The basic dynamic field quantities such as the hoop and axial stress amplitudes are evaluated and discussed for representative values of the parameters characterizing the system. The effects of formation material type, angle of incidence, incident wave frequency, and the proximity of the two tunnels on the liner stresses are examined. Particular attention is paid to the influence of bonding and drainage conditions at the liner/soil interface on the dynamic stress concentrations. Limiting cases are considered and good agreement with the solutions available in the literature is obtained. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v134/i7/p542_s1?isAuthorized=no

Dynamic stress concentrations in lined twin tunnels within fluid-saturated soil / Seyyed M. Hasheminejad in Journal of engineering mechanics, Vol 134 n° 7 (Juillet 2008) 

Public ISBD [article]  in Journal of engineering mechanics > Vol 134 n° 7 (Juillet 2008) . - pp.542–554 Titre : Dynamic stress concentrations in lined twin tunnels within fluid-saturated soil Type de document : texte imprimé Auteurs : Seyyed M. Hasheminejad, Auteur ; Reza Avazmohammadi, Auteur Année de publication : 2013 Article en page(s) : pp.542–554 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Stress  Tunnel  Saturated  soils  Three-dimensional  models Résumé : An exact analysis for three-dimensional dynamic interaction of monochromatic seismic plane waves with two lined circular parallel tunnels within a boundless fluid-saturated porous elastic medium is presented. The novel features of Biot dynamic theory of poroelasticity along with the appropriate wave field expansions, the pertinent boundary conditions, and the translational addition theorems for cylindrical wave functions are employed to obtain a closed-form solution in the form of infinite series. The analytical results are illustrated with numerical examples in which two identical tunnels, lined with concrete and embedded within water-saturated soils of distinct frame properties (i.e., soft or stiff soils), are insonified by plane fast compressional or shear waves at end-on incidence. The basic dynamic field quantities such as the hoop and axial stress amplitudes are evaluated and discussed for representative values of the parameters characterizing the system. The effects of formation material type, angle of incidence, incident wave frequency, and the proximity of the two tunnels on the liner stresses are examined. Particular attention is paid to the influence of bonding and drainage conditions at the liner/soil interface on the dynamic stress concentrations. Limiting cases are considered and good agreement with the solutions available in the literature is obtained. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282008%29134%3A7%2854 [...] [article] Dynamic stress concentrations in lined twin tunnels within fluid-saturated soil [texte imprimé] / Seyyed M. Hasheminejad, Auteur ; Reza Avazmohammadi, Auteur . - 2013 . - pp.542–554. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol 134 n° 7 (Juillet 2008) . - pp.542–554 Mots-clés : Stress  Tunnel  Saturated  soils  Three-dimensional  models Résumé : An exact analysis for three-dimensional dynamic interaction of monochromatic seismic plane waves with two lined circular parallel tunnels within a boundless fluid-saturated porous elastic medium is presented. The novel features of Biot dynamic theory of poroelasticity along with the appropriate wave field expansions, the pertinent boundary conditions, and the translational addition theorems for cylindrical wave functions are employed to obtain a closed-form solution in the form of infinite series. The analytical results are illustrated with numerical examples in which two identical tunnels, lined with concrete and embedded within water-saturated soils of distinct frame properties (i.e., soft or stiff soils), are insonified by plane fast compressional or shear waves at end-on incidence. The basic dynamic field quantities such as the hoop and axial stress amplitudes are evaluated and discussed for representative values of the parameters characterizing the system. The effects of formation material type, angle of incidence, incident wave frequency, and the proximity of the two tunnels on the liner stresses are examined. Particular attention is paid to the influence of bonding and drainage conditions at the liner/soil interface on the dynamic stress concentrations. Limiting cases are considered and good agreement with the solutions available in the literature is obtained. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282008%29134%3A7%2854 [...]