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Pipe-soil interaction model incorporating large lateral displacements in calcareous sand / Yinghui Tian in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 3 (Mars 2011) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 3 (Mars 2011) . - pp. 279-287 Titre : Pipe-soil interaction model incorporating large lateral displacements in calcareous sand Type de document : texte imprimé Auteurs : Yinghui Tian, Auteur ; Mark J. Cassidy, Auteur Année de publication : 2011 Article en page(s) : pp. 279-287 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Pipe-soil  interaction  On-bottom  stability  Strain-hardening  plasticity  Centrifuge  test  Calcareous  sand,  Berm  effect Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The use of the plasticity theory offers an attractive framework to encapsulate the behavior of a pipe and the underlying soil in terminology consistent with pipeline structural analysis. Models that express the pipe-soil behavior purely in terms of the loads on a segment of pipe and the corresponding displacements have been suggested, although verification with geotechnical centrifuge experiments has been limited to relatively small lateral displacements (i.e., less than two pipe diameters). Over larger movements, the berms that build up alongside the pipe affect the load-displacement behavior, with existing strain-hardening plasticity models incapable of simulating this transition. This technical note provides experimental evidence of pipe-soil behavior for lateral displacements for up to five diameters. It further presents observations from 20 centrifuge experiments of a prototype 1-m-diameter pipe in calcareous sand. The results are used to validate the modification of a pipe-soil model to include the horizontal displacement hardening of the yield surface. Retrospective numerical simulations of the centrifuge experiments verify the modified model’s performances for lateral displacements of up to five diameters which was also the extent of the centrifuge experiments. This incorporation of large lateral displacements has significant application in on-bottom stability analysis as displacement-based design becomes more prevalent. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i3/p279_s1?isAuthorized=no [article] Pipe-soil interaction model incorporating large lateral displacements in calcareous sand [texte imprimé] / Yinghui Tian, Auteur ; Mark J. Cassidy, Auteur . - 2011 . - pp. 279-287. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 3 (Mars 2011) . - pp. 279-287 Mots-clés : Pipe-soil  interaction  On-bottom  stability  Strain-hardening  plasticity  Centrifuge  test  Calcareous  sand,  Berm  effect Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The use of the plasticity theory offers an attractive framework to encapsulate the behavior of a pipe and the underlying soil in terminology consistent with pipeline structural analysis. Models that express the pipe-soil behavior purely in terms of the loads on a segment of pipe and the corresponding displacements have been suggested, although verification with geotechnical centrifuge experiments has been limited to relatively small lateral displacements (i.e., less than two pipe diameters). Over larger movements, the berms that build up alongside the pipe affect the load-displacement behavior, with existing strain-hardening plasticity models incapable of simulating this transition. This technical note provides experimental evidence of pipe-soil behavior for lateral displacements for up to five diameters. It further presents observations from 20 centrifuge experiments of a prototype 1-m-diameter pipe in calcareous sand. The results are used to validate the modification of a pipe-soil model to include the horizontal displacement hardening of the yield surface. Retrospective numerical simulations of the centrifuge experiments verify the modified model’s performances for lateral displacements of up to five diameters which was also the extent of the centrifuge experiments. This incorporation of large lateral displacements has significant application in on-bottom stability analysis as displacement-based design becomes more prevalent. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i3/p279_s1?isAuthorized=no