This paper proposes closed-form approximations of the axial force-bending moment interaction diagrams for reinforced concrete columns and concrete-filled steel tubes with circular cross-section. For reinforced concrete columns, this simplified formulation is obtained by assuming an elastic-perfectly plastic behavior of the reinforcing steel and the parabola-rectangular strain-stress relation for the concrete in compression. As regards concrete-filled steel tubes, full plasticity conditions are considered. Interestingly, a single closed-form expression is provided for both cases, wherein only one parameter (which depends on the mechanical ratio of the reinforcing steel) is calibrated by means of a numerical optimization procedure. The accuracy of the formulation is demonstrated through several numerical applications. Finally, a simple design procedure based on the approximated interaction diagrams is developed.

Closed-form approximations of interaction diagrams for assessment and design of reinforced concrete columns and concrete-filled steel tubes with circular cross-section / Trentadue, Francesco; Quaranta, Giuseppe; Marano, Giuseppe Carlo. - In: ENGINEERING STRUCTURES. - ISSN 0141-0296. - STAMPA. - 127:(2016), pp. 594-601. [10.1016/j.engstruct.2016.08.059]

Closed-form approximations of interaction diagrams for assessment and design of reinforced concrete columns and concrete-filled steel tubes with circular cross-section

QUARANTA, GIUSEPPE;
2016

Abstract

This paper proposes closed-form approximations of the axial force-bending moment interaction diagrams for reinforced concrete columns and concrete-filled steel tubes with circular cross-section. For reinforced concrete columns, this simplified formulation is obtained by assuming an elastic-perfectly plastic behavior of the reinforcing steel and the parabola-rectangular strain-stress relation for the concrete in compression. As regards concrete-filled steel tubes, full plasticity conditions are considered. Interestingly, a single closed-form expression is provided for both cases, wherein only one parameter (which depends on the mechanical ratio of the reinforcing steel) is calibrated by means of a numerical optimization procedure. The accuracy of the formulation is demonstrated through several numerical applications. Finally, a simple design procedure based on the approximated interaction diagrams is developed.
2016
Bridge; Concrete-filled steel tube; Interaction diagram; Optimization; Reinforced concrete column
01 Pubblicazione su rivista::01a Articolo in rivista
Closed-form approximations of interaction diagrams for assessment and design of reinforced concrete columns and concrete-filled steel tubes with circular cross-section / Trentadue, Francesco; Quaranta, Giuseppe; Marano, Giuseppe Carlo. - In: ENGINEERING STRUCTURES. - ISSN 0141-0296. - STAMPA. - 127:(2016), pp. 594-601. [10.1016/j.engstruct.2016.08.059]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/949413
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