ABSTRACT
A modelling approach to characterize the stress-strain relationship of gravel under monotonic as well as large cyclic loading is presented with the use of a series of drained triaxial test data on reconstituted dense gravel, using sin(ϕ)mob as stress parameter and plastic shear strain γ P as strain parameter. Monotonic loadings were modelled according to the generalized hyperbolic equations (GHE). Masing’s 2nd rule, proportional rule and the drag rule were implemented for modelling of cyclic loading. The stress and strain parameters were further modified as sin(ϕ)mob/sin(ϕ)peak and Σ(dγ P/γ r), respectively, aiming at achieving a unique stress~strain relationship independent of stress paths. (ϕ)peak is the peak mobilized angle of internal friction and γ r [=τpeak/Go] is a reference shear strain. τpeak and GO are peak shear strength and quasi-elastic shear modulus, respectively. The simulated stress-strain behaviours were well in accordance with those measured under various triaxial stress paths.
