@inproceedings{Taborda:2010,
author = {Taborda, D and Zdravkovic, L and Kontoe, S and Potts, DM},
pages = {423--428},
title = {Alternative formulations for cyclic nonlinear models: parametric study and comparative analyses},
year = {2010}
}

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TY  - CPAPER
AB  - The utilisation of cyclic nonlinear elastic models presents numerous advantages when analysingsimple dynamic problems, such as one-dimensional site response. This class of models requires a small numberof parameters to be determined and can efficiently reproduce the strain dependency of the secant shear stiffnessand hysteretic damping. However, it has been frequently noted that, for medium to large deformation levels, thepredicted damping ratio can be significantly larger than the values evaluated for most soils through laboratorytesting. To minimise the effects of this overestimation on the overall response of the system, which may lead tonon conservative results, different formulations have been proposed. In this paper, two alternative expressionsfor the stress-strain behaviour of soils – hyperbolic and logarithmic – are presented and their ability to reproducewell-established empirical stiffness degradation and damping ratio curves is assessed. Finally, the results of a setof dynamic finite element analyses of a one-dimensional wave propagation problem are presented to illustratethe impact of the different formulations on the engineering behaviour of soil deposits.
AU  - Taborda,D
AU  - Zdravkovic,L
AU  - Kontoe,S
AU  - Potts,DM
EP  - 428
PY  - 2010///
SP  - 423
TI  - Alternative formulations for cyclic nonlinear models: parametric study and comparative analyses
ER  - 

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