FINITE ELEMENT SIMULATION OF RIDGE KEEL PUNCH TEST WITH SHEAR-CAP MATERIAL MODEL

摘要

Full-scale ridge keel loading tests, conducted during the LOLEIF and STRICE projects, were simulated numerically by the Finite Element Method (FEM). In a punch test, the keel was loaded vertically by a platen pushed down 0.7 m to break the underlying keel. The force and displacement of the platen and the keel deformations both inside the rubble and at the keel bottom were measured.rnIce rubble was treated as a continuum in which the deformations were defined according to the plasticity theory. To describe different deformation mechanisms, a shear-cap material model was adopted. The model describes both shearing and compaction failure implemented into the FEM. The model calibration was made by comparing the load responses between the punch test simulations and full-scale tests. Parametric studies were needed to evaluate the admissible combination of cohesion and the friction angle.