ELASTOPLASTIC CONSTITUTIVE EQUATION OF SHIRASU BASED ON THE EXTENDED SUBLOADING SURFACE MODEL

摘要

This study is aimed for the description of the deformation behavior of Shirasu soil(volcanic sandy soil) for reclamation and embankment, by the elasto-plastic constitutive equation adopting the subloading surface model with the rotational hardening. And also test results for the isotropic consolidation and the monotonic/cyclic loading-unloading compression with several lateral stresses under the drained conditions for various initial void ratios are reported. Further, the simulation by the constitutive equation based on the extended subloading surface model is compared with the test results. High applicability of the constitutive equation for the prediction of mechanical behavior of Shirasu soil for a geo-material at the lowland in the southern Kyushu is verified by the comparison.