Modélisation constitutive du comportement cyclique des sables en condition drainée

• Autorzy: Messast S. , Boulon M. , Flavigny E. , Labanieh S.
• Konferencja: Proceedings of the 14th French-Polish Colloguium "Soli and Rock Mechanics. soil Mechanics - Geomaterials" Grenoble, August 29-31, 2007
• Języki publikacji: FR

Abstrakty

EN

Considerable strains appear in the structures at the time of the irreversible strains accumulation of the foundation soil under the effect of the cyclic loads. If the number of cycles is very high even "small strains" after accumulation become important and sometimes harmful. In this study, a simple numeric modelling of the behaviour of the sands under cyclic loading is proposed. The proposed approach attempts, in drained condition, to determine the parameters characterizing the average cyclic path of soil under the effect of N cycles duly characterized, and to explain the cyclic effect by an accumulated volumetric strain as well as by a variation of the soil modulus. In this survey, triaxial cyclic tests are simulated by means of a calculation by Finite Elements Method using the Plaxis program. The determination of identification parameters of the first cycle (load-unload) realised step-by-step was achieved by taking the HSM model as the behaviour model of soil. Then the behaviour after N cycles (N > 103) is simulated by the proposed formulation as a pseudo-flow. The comparison of the proposed method to several triaxial cyclic tests confirms the good adaptation of the proposed model to this type of problems.

Słowa kluczowe

EN

strains accumulation; foundation soil

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2008
• Tom: Vol. 30, nr 1-2
• Strony: 131--137
• Opis fizyczny: bibliogr. 7 poz.,

Twórcy

autor

Messast S.

autor

Boulon M.

autor

Flavigny E.

autor

Labanieh S.

• Laboratoire de Mathématiques et de Calcul Scientifique (LARMACS), Département de Génie Civil, Université de Skikda, BP 26, Route d'Elhadeik, 21000, Skikda, Algérie

Bibliografia

• [1] WICHTMANN T., NIEMUNIS A., TRIANDTAFYLLIDIS Th., Strain accumulation in sand due to cyclic loading: drained cyclic tests, Soil Dynamics & Earthquake Engineering, 2005, 25, 967–979.
• [2] WICHTMANN T., Explicit accumulation model for non-cohesive soils under cyclic loading, thèse de doctorat, 2005, Université de Bochum.
• [3] THANOPOULOS I., Contribution à l’étude du comportement cyclique des milieux pulvérulents, Thèse Docteur-Ingénieur, 1981, Université Scientifique et médicale & l’institut national polytechnique de Grenoble.
• [4] SAWICKI A., SWIDZINSKI W., Compaction curve as one of basic characteristics of granular soils, Proccedings du quatrième Colloque Franco-Polonais de mécanique des sols appliquée, Grenoble, 1987, Vol. 1, 103–115.
• [5] NIEMUNIS A., WICHTMANN T., TRIANDTAFYLLIDIS Th., A high-cycle accumulation model for sand, Computers and geotechnics, 2005, 32, 245–263.
• [6] MARR W.A., CHRISTIAN J.T., Permanent displacements due to cyclic wave loading, Journal of the geotechnical engineering division, ASCE, 1981, 107, N°. GT8, 1129–1149.
• [7] BOUCKOVALAS G., WHITMAN R.V., MARR W.A., Permanent displacement of sand with cyclic loading, Journal of the geotechnical engineering, 1984, 110, N° 11, 1606–1623.