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.
EN 1998-1, Eurocode 8, Design of structures for earthquake resistance, Part 1: General Rules, Seismic Actions and Rules for Buildings, Dec. 2003, Brussels, Belgium.
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Hsu C. T.Behavior of structural concrete subjected to biaxial flexure and axial compression1974)| false
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Hsu C. T.Civil Engineering Practice1987)| false
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Hsu C. T.Channel-shaped reinforced concrete compression members under biaxial bendingACI Structural Journal198784201211)| false
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Ramamurthy L. N.Reinforced Concrete Columns, SP-131966)| false