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  • 1 University of Messina Department of Civil Engineering, Faculty of Engineering C.da di Dio 1 P O Box 173362 98166 Vill. Sant’Agata, Messina Italy
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A numerical procedure is presented for the study of the failure mechanism of reinforced concrete sections of arbitrary shape in biaxial bending with axial force. The procedure is a fiber model, which allows to compute the moment-curvature diagram and the interaction domains using non-linear constitutive laws, also with softening post-peak branch for concrete. The numerical technique is able to find the position and the orientation of the neutral axis that determines a resultant moment, which acts along a predefined orientation angle. Analytical moment-curvature diagrams and interaction domains are compared with data published in the literature.

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