The expansion rate will be determined by the value of the current OCR. Furthermore, the cap will never stop expanding - although with a continuously decreasing expansion rate. The Soft-Soil-Creep (SSC) model ( Vermeer and Neher, 1999) takes time-dependence into account so that the volumetric cap expands to a new position within a specific time (called reference time in the model) instead of instantaneously as in the SS model. The creep behavior of soft soil can be significant for some geotechnical engineering problems, e.g., embankment construction. The Soft-Soil (SS) model cannot simulate time-dependent behavior, such as the creep that develops during the secondary compression. Virgin loading (c) expansion of the volumetric yield ellipse-shapedĬap and (d) conventional Mohr-Coulomb shear failure and tension failure Pressure-dependent moduli (b) unloading-reloading distinct from the The soft-soil (SS) model has the following features: (a) Significant compression, is one of the main engineering characteristics Over-consolidated clays, silty-clays, clayey silts, and peats. Soft soils generally refer to normally consolidated or slightly Testing (blue, dashed curves) considering the effects of principal (red, solid curves) compares to measured direct simple shear (DSS) The following figure demonstrates just how well NorSand in FLAC3D7 The results wereĬross-verified with a VBA-coded spreadsheet for simulations of variousĭensities, drainage conditions, and test types (including triaxial Simulated as well as static liquefaction. Stress rotation is also incorporated so that the cyclic mobility can be The recent developed feature of principle The model isįrequently applied to tailings dam analysis.įLAC3D's implementation also considers the effect of Lode’sĪngle so that the shear strengths with different second principal Slope-steepened, or sudden rising of pore-pressure. (i.e., flow liquefaction) of a soil structure being over-surcharged, It is suitable for simulating the typical brittle collapse Static liquefaction of very loose soils through to dilation of veryĭense soils.
Determine significant differences flac3d full#
NorSand explicitly captures the full range of soil behavior, from Laboratory or in-situ tests (e.g., CPT data). Properties which are familiar and can be estimated from routine So that it captures the behavior of granular soils over a wide range ofĬonfining stresses and densities. Slips rather than bonds, intrinsically incorporating the state parameter Particle-to-particle interactions are controlled by contact forces and Is a critical state model applicable to soils in which
NorSand ( Jefferies 1993, Jefferies and Been 2015) Zhao Cheng’s GEESD V conference presentation:Ī Practical 3D Bounding Surface Plastic Sand Model for Geotechnical Earthquake Engineering Application (PDF, 4 MB) NorSand (Static/Dynamic/Liquefaction) Learn more about this powerful and easy-to-use solution by downloading Itasca engineer Dr.
0 kommentar(er)
