Prediction of permanent deformations in pavements using a high-cycle accumulation model / T. Wichtmann in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 5 (Mai 2010)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 136 N° 5 (Mai 2010) . - pp. 728-740 Titre : Prediction of permanent deformations in pavements using a high-cycle accumulation model Type de document : texte imprimé Auteurs : T. Wichtmann, Auteur ; H. A. Rondon, Auteur ; A. Niemunis, Auteur Année de publication : 2010 Article en page(s) : pp. 728-740 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Pavements Unbound granular material (UGM) Permanent deformations High-cycle accumulation model Cyclic triaxial tests Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The present paper discusses the application of a high-cycle accumulation (HCA) model originally developed for sand for the prediction of permanent deformations in an unbound granular material (UGM) used for base and subbase layers in pavements. Cyclic triaxial tests on precompacted samples of an UGM have been performed in order to validate and calibrate the model. The stress amplitude, the initial density, and the average stress were varied. The test results are compared to those of air-pluviated samples of sand (subgrade material). Some significant differences in the behavior of both materials under cyclic loading are outlined. It is demonstrated that the functions describing the intensity of accumulation can be maintained for an UGM with different material constants, but that the flow rule must be generalized in order to describe the anisotropy. Recalculations of the laboratory tests show a good prediction of the modified HCA model. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i5/p728_s1?isAuthorized=no [article] Prediction of permanent deformations in pavements using a high-cycle accumulation model [texte imprimé] / T. Wichtmann, Auteur ; H. A. Rondon, Auteur ; A. Niemunis, Auteur . - 2010 . - pp. 728-740. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 5 (Mai 2010) . - pp. 728-740 Mots-clés : Pavements Unbound granular material (UGM) Permanent deformations High-cycle accumulation model Cyclic triaxial tests Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The present paper discusses the application of a high-cycle accumulation (HCA) model originally developed for sand for the prediction of permanent deformations in an unbound granular material (UGM) used for base and subbase layers in pavements. Cyclic triaxial tests on precompacted samples of an UGM have been performed in order to validate and calibrate the model. The stress amplitude, the initial density, and the average stress were varied. The test results are compared to those of air-pluviated samples of sand (subgrade material). Some significant differences in the behavior of both materials under cyclic loading are outlined. It is demonstrated that the functions describing the intensity of accumulation can be maintained for an UGM with different material constants, but that the flow rule must be generalized in order to describe the anisotropy. Recalculations of the laboratory tests show a good prediction of the modified HCA model. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i5/p728_s1?isAuthorized=no

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