On consistent nonlinear analysis of soil-structure interaction problems

• Autorzy: Truty A.

Identyfikatory

DOI

10.2478/sgem-2018-0019

• Języki publikacji: EN

Abstrakty

EN

Nonlinear soil-linear structure computational strategy is commonly accepted in the community of geotechnical engineers using advanced finite element software for solving complex soil-structure interaction problems. However, further design procedure of the structural elements is carried out using increased values of the computed elastic stress resultants. It is absolutely not clear whether this method is conservative and, therefore, whether safe or not. To tackle this problem, a fully consistent nonlinear analysis of a deep excavation protected by the diaphragm wall is analysed here. The subsoil is modelled using the Hardening Soil model, while reinforced concrete is modelled using the modified Lee-Fenves model enhanced by the Eurocode 2 (EC2)-compatible creep module, developed by the author. It is shown that the commonly used nonlinear soil-linear structure computational strategy may yield insufficient amount of reinforcement from the ultimate limit state (ULS) and serviceability limit state (SLS) points of view. A consistent and conservative method of combining fully nonlinear analysis and the rules imposed by the EC2 is proposed.

Słowa kluczowe

EN

soil-structure interaction; constitutive modeling; deep excavations; finite elements

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2018
• Tom: Vol. 40, nr 2
• Strony: 86--95
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Truty A.

• Instytut Geotechniki, Wydział Inżynierii Środowiska, Politechnika Krakowska

Bibliografia

• [1] Obrzud, R., Hartmann, S., Podleś, K. (2016). Selected aspects of designing deep excavations. Studia Geotechnica et Mechanica, 38.
• [2] Truty, A., Podleś, S. (2010). Application of Hardening Soil-small model for analysis of soil-structure interaction problems (in Polish). Czasopismo Techniczne, 1, 117-134.
• [3] Lee, J., Fenves, G.L. (1998). Plastic-damage model for cyclic loading of concrete structures. Journal of Engineering Mechanics, 124, 892-900.
• [4] Lee, J., Fenves, G.L. (2001). A return-mapping algorithm for plastic-damage models: 3-D and plane stress formulation. IJNME, 50, 487-506.
• [5] Truty, A. (2016). Elastic-plastic damage model for concrete. Technical Report, ZSoil.PC 160102, January.
• [6] Schanz, T. (1998). Zur Modellierung des mechanischen Verhaltens von Reinbungsmaterialien. In Mitt. Inst. für Geotechnik 45. Universitat Stuttgart, Stuttgart.
• [7] Schanz, T., Vermeer, P.A., Bonier, P.G. (1999). Formulation and verification of the Hardening Soil Model. In Beyond 2000 in Computational Geotechnics. Balkema, Rotterdam.
• [8] Benz, T. (2006). Small-strain stiffness of soils and its numerical consequences. Ph.D. Thesis, University of Stuttgart.
• [9] Truty, A., Obrzud, R. (2015). Improved formulation of the Hardening Soil model in the context of modeling the undrained behavior of cohesive soils. Studia Geotechnica et Mechanica, 37, 61-68.
• [10] Obrzud, R., Truty, A. (2010). The hardening soil model: A practical guidebook. Technical Report Technical report ZSoil.PC 100701, ZACE Ltd, Lausanne.
• [11] Lubliner, J., Oliver, J., Oller, S., Oñate, E. (1989). A plasticdamage model for concrete. International Journal of Solids and Structures, 25(3), 299-326.
• [12] Oller, S., Oñate, E., Oliver, J., Lubliner, J. (1990). Finite element nonlinear analysis of concrete structures using a plasticdamage model. Engineering Fracture Mechanics, 35, 219-231.
• [13] Truty, A., Zimmermann, Th. (2015). Modified Lee-Fenves plasticdamage model for concrete. In Numerics in Geotechnics. Elmepress Ltd., Lausanne, Switzerland.
• [14] Havlásek, P. (2014). Creep and shrinkage of concrete subjected to variable environmental conditions. Ph. D. Thesis, Czech Technical University in Prague.
• [15] Truty, A., Podleś, K. (2016). Influence of diaphragm wall installation in overconsolidated sandy clays on in situ stress disturbance and resulting deformations. Annals of Warsaw University of Life Sciences – SGGW Land Reclamation, 48, 243-253.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).