Buckling of Rectangular Isolated R.C. Columns: Closed-form Approximation for Interaction Domains

Interaction domains for the buckling of isolated R.C. columns are an efficient and versatile instrument for the assessment of the resistance at Ultimate Limit State, and allow the optimization of the structural geometry and reinforcement ratio.

The paper presents the procedure for deriving interaction domains for rectangular symmetrically reinforced columns, providing a detailed analysis of the load-carrying capacity for various classes of concrete and reinforcement steel bars. Domains have been obtained according to themodel-column method, taking into account the uncertainties both in geometry and in the position of axial loads. Effects related to short_term creep are ignored.

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