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Author(s):	Bransch, Martin; Lehmann, Lutz
Title:
Abstract:	In dem Beitrag wird eine neue Methode zur Berechnung der elastisch-plastischen Baugrundverformungen und des Baugrundversagens unter Einbezug der Wellenausbreitung im Baugrund vorgestellt. Die hybride Methode basiert auf einer nichtlinearen Berechnung mittels der Finite-Elemente-Methode (FEM), einem nichtlinearen HHT-α-Zeitschrittverfahren und der “Scaled Boundary Finite Element Method” (SBFEM). Der Schwerpunkt der Arbeit liegt in der Erstellung eines praxisorientierten Berechnungsverfahrens, welches die genannten nicht-lineare Effekte berücksichtigt. Um dieses Ziel zu erreichen, wird ein nichtlineares HHT-α-Verfahren mit voller Newton-Raphson-Iteration implementiert. Die Anwendbarkeit wird anhand von Beispielen mit unterschiedlicher Komplexität gezeigt. Die Beispiele beziehen sich auf Flachgründungen, allerdings ist die Methode auch auf Tiefgründungen, Baugruben oder Erdbebenberechnungen übertragbar. Simulation of soil-structure-interaction with consideration of elastic-plastic soil behaviour. This article presents a new method for the calculation of elastic-plastic building ground deformations and failure including dynamic effects, like wave propagation. The presented procedure is a hybrid method, based on several common calculation methods. Included is the nonlinear calculation with the finite element method (FEM), a nonlinear HHT-α method and the scaled boundary finite element method (SBFEM). Focuses are the implementation of an elastic-plastic soil model with isotropic hardening, the derivation and implementation of a nonlinear HHT-α method with full Newton-Raphson iteration, and the implementation of these methods and the SBFEM in a nonlinear overall calculation scheme. The applicability of the developed method is given in several examples in different complexity. The examples are related to shallow foundations. But the method is also portable to pile foundations, building pits or earthquake calculations.
Source:	Bautechnik 88 (2011), No. 4
Page/s:	237-243
Language of Publication:	German

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