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E.X. Song, A. Verruijt, "Undrained Finite Element Analysis of Soil for Collapse Load with the Effective Stress Method", in B.H.V. Topping, (Editor), "Proceedings of the Fourth International Conference on Civil and Structural Engineering Computing", Civil-Comp Press, Edinburgh, UK, pp 229-234, 1989. doi:10.4203/ccp.9.18.4

Abstract

In this paper the undrained elasto-plastic finite element analysis of saturated soil is discussed. The effective stress method is used and special attention is paid to evaluate the collapse load. A constitutive model based on the Drucker-Prager approximation of Coulomb criterion with friction hardening and varying dilatancy angle is adopted to model the deformation behavior of the soil skeleton. As numerical examples, some footing problems have been analyzed. The results reveal the complicated behavior of undrained soil. When the dilatancy angle is positive (the soil dilates), the soil system shows a hardening behavior even when modeled with a perfectly plastic model. When the dilatancy angle is negative (the soil contracts), the soil system may show softening even when modeled with a hardening model. At the same time this paper shows that the procedure proposed here is capable of modeling and analyzing the softening behavior of undrained soil.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 9/10 PROCEEDINGS OF THE FOURTH INTERNATIONAL CONFERENCE ON CIVIL AND STRUCTURAL ENGINEERING COMPUTING Edited by: B.H.V. Topping Paper XVIII.4 Undrained Finite Element Analysis of Soil for Collapse Load with the Effective Stress Method E.X. Song and A. Verruijt Delft University of Technology, Delft, The Netherlands doi:10.4203/ccp.9.18.4 purchase the full-text of this paper Full Bibliographic Reference for this paper E.X. Song, A. Verruijt, "Undrained Finite Element Analysis of Soil for Collapse Load with the Effective Stress Method", in B.H.V. Topping, (Editor), "Proceedings of the Fourth International Conference on Civil and Structural Engineering Computing", Civil-Comp Press, Edinburgh, UK, pp 229-234, 1989. doi:10.4203/ccp.9.18.4 Abstract In this paper the undrained elasto-plastic finite element analysis of saturated soil is discussed. The effective stress method is used and special attention is paid to evaluate the collapse load. A constitutive model based on the Drucker-Prager approximation of Coulomb criterion with friction hardening and varying dilatancy angle is adopted to model the deformation behavior of the soil skeleton. As numerical examples, some footing problems have been analyzed. The results reveal the complicated behavior of undrained soil. When the dilatancy angle is positive (the soil dilates), the soil system shows a hardening behavior even when modeled with a perfectly plastic model. When the dilatancy angle is negative (the soil contracts), the soil system may show softening even when modeled with a hardening model. At the same time this paper shows that the procedure proposed here is capable of modeling and analyzing the softening behavior of undrained soil. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £78 +P&P)
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