Enhanced microplane concrete model and Multi equivalent series phase model in DIANA for fracture analysis of concrete structures

T.Hasegawa (Institute of Technology, Shimitzu Corporation, Tokyo, Japan)

The Multi Equivalent Series Phase Model and the Enhanced Microplane Concrete Model are nonlocal and local constitutive models derived by treating microscopic fracture regions respectively as series phases consisting of fracture and unloading phases and as planes (microplanes) with various orientations. Both models are implemented in the finite element system DIANA, and are applied to the simulation of failures of reinforced concrete members under shear as well as bending. The analysis results give lucid explanations of the failure mechanism of the members, and bring some issues in failure analysis into sharp relief.

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