ISA-Hypoplasticity accounting for cyclic mobility effects for liquefaction analysis

The hypoplastic model for sands proposed by Wolffersdorff (Mech Cohes Frict Mater 1: 251-271, 1996) combined with the intergranular strain anisotropy by Fuentes and Triantafyllidis (Int J Numer Anal Meth Geomech 39: 1235-1254, 2015) is herein extended to account for cyclic mobility effects to allow for the simulation of liquefaction phenomena. The extension is based on the introduction of an additional state variable that permits the detection of cyclic mobility paths. The simulation capabilities of the model is compared with undrained triaxial tests of Karlsruhe fine sand. At the end, a finite element simulation of an offshore monopile embedded in sand, exposed to environmental forces from the Caribbean Sea, is constructed and analyzed.