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G. Meschke:
"Application of Elasto-Plastic Constitutive Models to 3D Finite Element Analyses of RC-Structures";
in: "Proceedings of the Second International Conference on Computer Aided Analysis and Design of Concrete Structures", Pineridge Press, Swansea, 1990, 1041 - 1053.

The paper provides information about the influence of different elasto-plastic models for triaxially loaded concrete, characterized by a different degree of sophistication, on the results of finite element ultimate load analyses of reinforced concrete structures. The selected models are a simple perfectly plastic Drucker-Prager model, the associate-plasticity model by Glemberg and a hypoplastic model, developed by the author. Two structural members, each one representing a different state of stress, are investigated. The numerical investigation of a thick-walled corbel, the collapse of which is initiated by yielding of the reinforcement, elucidates the relative insignificance of constitutive modelling of concrete in the prefailure regime as compared to the modelling of the interface shear transfer across cracks. The second numerical example pertains to a reinforced concrete ring under radial loads. It is found, that the specific characteristics of the more sophisticated constitutive models concerning the prefailure concrete behavior only have a relatively small influence on the predicted response of this kind of structure. On the basis of a scalar crushing criterion, good agreement between the predicted ultimate load and the experimental result is obtained.

Keywords: concrete, RC, 3D, triaxial, compression, elasto-plastic, constitutive, models, Finite Element