Microplane finite element analysis of tube-squash test of concrete with shear angles up to 70°

Finite element analysis of the response of concrete structures to impact events such as missile penetration, explosive driving of anchors, blast, ground shock or seismic loading, requires knowledge of the stress–strain relations for concrete for *nite strain at high pressures. A novel type of material test achieving very large shear angles of concrete at very large pressures, called the tube-squash test, can be used to calibrate a concrete model taking into account plastic deformation at extreme pressures. A *nite element analysis of such a test is performed by using a *nite strain generalization of microplane models for concrete and steel. The results obtained are in good agreement with those previously obtained with a simpli*ed method of analysis. Thus, they provide a validation of the microplane model, which is shown to becapableof reproducing there sponseof concretenot only for small strains at small pressures, which is predominantly brittle, but also for high pressures and large *nite strains, which is predominantly frictional plastic