Abstract
Overconsolidated clays are often encountered in geotechnical engineering; therefore, developing a sophisticated model that can accurately describe the mechanical behavior of overconsolidated clays has high practical value. Based on the transformed stress and the subloading surface concept, this paper presents a generalized critical-state model, with special focus on the volume change under three-dimensional loading conditions. Because existing experimental results show that not only the shear strength but also the volume change of clays depend on the loading conditions, a new stress–dilatancy equation (relationship between stress ratio and plastic strain increment ratio) defined in the transformed stress space is established. Then, by introducing the subloading surface concept, a new critical-state model is proposed. The new model not only describes the strain-softening behavior of overconsolidated clays, but also takes into consideration the influence of intermediate principal stress on strength and deformation of clays. The performance of the model is validated by triaxial compression and extension tests and true triaxial tests on normally consolidated and overconsolidated clays.
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Acknowledgments
The financial support of the National Nature Science Foundation of China (Grant 41372284) and the Science and Technology Commission of Shanghai Municipality (Funding 16DZ1202204) are gratefully acknowledged.
References
Asaoka, A., Nakano, M., and Noda, T. (2000). “Elasto-plastic behavior of structured overconsolidated soils.” J. Appl. Mech., 3, 335–342.
Chowdhury, E. Q., Nakai, T., Tawada, M., and Yamada, S. (1999). “A model for clay using modified stress under various loading conditions with the application of subloading concept.” Soils Found., 39(6), 103–116.
Dafalias, Y. F., and Herrmann, L. R. (1982). “Bounding surface formulation of soil plasticity.” Soil mechanics: Transient and cyclic loads, G. N. Pande and O. C. Zienkiewicz, eds., Chichester: John Wiley & Sons, Chichester, U.K., 253–282.
Gu, L. L., Ye, G. L., Bao, X. H., and Zhang, F. (2016). “Mechanical behaviour of piled-raft foundations subjected to high-speed train loading.” Soils Found., 56(6), 1035–1054.
Hashiguchi, K. and Ueno, M. (1977). “Elasto-plastic constitutive laws of granular materials.” Proc., IX Int. Conf. Soil Mech. Found. Engrg., Balkema, Rotterdam, Netherlands, 73–82.
Karstunen, M., Rezania, M., Sivasithamparam, N., and Yin, Z. Y. (2015). “Comparison of anisotropic rate-dependent models for modeling consolidation of soft clays.” Int. J. Geomech., A4014003.
Kimoto, S., Shahbodagh Khan, B., Mirjalili, M., and Oka, F. (2015). “Cyclic elastoviscoplastic constitutive model for clay considering nonlinear kinematic hardening rules and structural degradation.” Int. J. Geomech., A4014005.
Lade, P. V., and Duncan, J. M. (1975). “Elastoplastic stress–strain theory for cohesionless soil.” J. Geotech. Eng. Div., 101(10), 1037–1053.
Matsuoka, H., and Nakai, T. (1974). “Stress-deformation and strength characteristics of soil under three different principal stresses.” Proc. Jpn. Soc. Civ. Eng., 1974(232): 59–70.
Matsuoka, H., Yao, Y., and Sun, D. (1999). “The Cam-clay models revised by the SMP criterion.” Soils Found., 39(1), 81–95.
Miller, G. A., and Lutenegger, A. J. (1997). “Influence of pile plugging on skin friction in overconsolidated clay.” J. Geotech. Geoenviron. Eng., 525–533.
Nakai, T., and Hinokio, M. (2004). “A simple elastoplastic model for normally and over consolidated soil with unified material parameters.” Soils Found., 44(2), 53–70.
Nakai, T., and Matsuoka, H. (1986). “A generalized elastoplastic constitutive model for clay in three-dimensional stresses.” Soils Found., 26(3), 81–98.
Nakai, T., Matsuoka, H., Okuno, N., and Tsuzuki, K. (1986). “True triaxial tests on normally consolidated clay and analysis of the observed shear behavior using elastoplastic constitutive models.” Soils Found., 26(4), 67–78.
Ouria, A., Desai, C. S., and Toufigh, V. (2015). “Disturbed state concept–based solution for consolidation of plastic clays under cyclic loading.” Int. J. Geomech., 04014039.
Prashant, A., and Penumadu, D. (2004). “Effect of intermediate principal stress on overconsolidated kaolin clay.” J. Geotech. Geoenviron. Eng., 284–292.
Prashant, A., and Penumadu, D. (2005). “A laboratory study of normally consolidated kaolin clay.” Can. Geotech. J., 42(1), 27–37.
Roscoe, K. H., Schofield, A., and Thurairajah, A. (1963). “Yielding of clays in states wetter than critical.” Géotechnique, 13(3), 211–240.
Samui, P., and Kurup, P. (2013). “Use of the relevance vector machine for prediction of an overconsolidation ratio.” Int. J. Geomech., 26–32.
Shi, J. W. (2015). “Investigation of three-dimensional tunnel responses due to basement excavation.” Ph.D. thesis, Hong Kong Univ., Hong Kong.
Taghavi, A., and Muraleetharan, K. K. (2017). “Analysis of laterally loaded pile groups in improved soft clay.” Int. J. Geomech., 04016098.
Wang, Q., and Lade, P. V. (2001). “Shear banding in true triaxial tests and its effect on failure in sand.” J. Eng. Mech, 754–761.
Whittle, A. J., and Kavvadas, M. J. (1994). “Formulation of MIT-E3 constitutive model for overconsolidated clays.” J. Geotech. Eng., 173–198.
Wu, C. J., Ye, G. L., Zhang, L. L., Bishop, D., and Wang, J. H. (2015). “Depositional environment and geotechnical properties of Shanghai clay: A comparison with Ariake and Bangkok clays.” Bull. Eng. Geol. Environ., 74(3), 717–732.
Xiong, Y. L., Ye, G. L., Zhu, H. H., Zhang, S., and Zhang, F. (2017). “A unified thermo-elasto-viscoplastic model for soft rock.” Int. J. Rock Mech. Min. Sci., 93, 1–12.
Yao, Y. P., Hou, W., and Zhou, A. N. (2009). “UH model: Three-dimensional unified hardening model for overconsolidated clays.” Géotechnique, 59(5), 451–470.
Yao, Y. P., and Sun, D. A. (2000). “Application of Lade’s criterion to Cam-clay model.” J. Eng. Mech., 112–119.
Yao, Y. P., Zhou, A. N., and Lu, D. C. (2007). “Extended transformed stress space for geomaterials and its application.” J. Eng. Mech., 1115–1123.
Ye, G. L., Sheng, J. R., Ye, B., and Wang, J. H. (2012). “Automated true triaxial apparatus and its application to over-consolidated clay.” Geotech. Test. J., 35(4), 517–528.
Ye, G. L., and Ye, B. (2016). “Investigation of the overconsolidation and structural behavior of Shanghai clays by element testing and constitutive modeling.” Underground Space, 1(1), 62–77.
Ye, G. L., Ye, B., and Zhang, F. (2014). “Strength and dilatancy of overconsolidated clays in drained true triaxial tests.” J. Geotech. Geoenviron. Eng., 06013006.
Ye, G. L., Zhang, F., Yashima, A., Sumi, T., and Ikemura, T. (2005). “Numerical analyses on progressive failure of slope due to heavy rain with 2D and 3D FEM.” Soils Found., 45(2), 1–15.
Yin, Z. Y., Chang, C. S., Karstunen, M., and Hicher, P. Y. (2010). “An anisotropic elastic–viscoplastic model for soft clays.” Int. J. Solids Struct., 47(5), 665–677.
Yin, Z. Y., Karstunen, M., Chang, C. S., Koskinen, M., and Lojander, M. (2011). “Modeling time-dependent behavior of soft sensitive clay.” J. Geotech. Geoenviron. Eng., 1103–1113.
Zhang, F., Yashima, A., Nakai, T., Ye, G. L., and Aung, H. (2005). “An elasto-viscoplastic model for soft sedimentary rock based on tij concept and subloading surface.” Soils Found., 45(1), 65–73.
Zienkiewicz, O. C., and Pande, G. N. (1977). “Some useful forms of isotropic yield surface for soil and rock mechanics.” Finite elements in geomechanics, G. Gudehus, ed., Wiley, London, 179–190.
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Published In
International Journal of Geomechanics
Volume 18 • Issue 3 • March 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Feb 24, 2017
Accepted: Sep 28, 2017
Published online: Jan 9, 2018
Published in print: Mar 1, 2018
Discussion open until: Jun 9, 2018
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