This paper illustrates the extension to the rectangular section of an analytical model for confined concrete proposed for square sections confined by steel stirrups and/or FRP jackets. The confined concrete model is developed starting from the elasticity theory and under the key assumption that the confinement acts under the plane-strain conditions. The confining pressure within the section core is obtained by an analogy formulated in polar coordinates regarding internal co-axial cylinders for obtaining the equivalent confining pressure within the section core. The model is suitable to be implemented by using any active confinement triaxial model and for describing the also the contribution offered by external FRP wraps and/or steel jackets. The paper concludes with some experimental results demonstrating the accuracy of the new analytical model proposed in predicting the confined concrete stress-strain relationship of rectangular section cores.

Analytical model for concrete confined by steel stirrups and/or FRP jackets in rectangular sections / Braga, F.; D'Amato, M.; Gigliotti, R.; Laterza, M.. - 2:(2019), pp. 2769-2780. (Intervento presentato al convegno 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2019 tenutosi a Crete, Greece) [10.7712/120119.7108.19537].

Analytical model for concrete confined by steel stirrups and/or FRP jackets in rectangular sections

Abstract

This paper illustrates the extension to the rectangular section of an analytical model for confined concrete proposed for square sections confined by steel stirrups and/or FRP jackets. The confined concrete model is developed starting from the elasticity theory and under the key assumption that the confinement acts under the plane-strain conditions. The confining pressure within the section core is obtained by an analogy formulated in polar coordinates regarding internal co-axial cylinders for obtaining the equivalent confining pressure within the section core. The model is suitable to be implemented by using any active confinement triaxial model and for describing the also the contribution offered by external FRP wraps and/or steel jackets. The paper concludes with some experimental results demonstrating the accuracy of the new analytical model proposed in predicting the confined concrete stress-strain relationship of rectangular section cores.
Scheda breve Scheda completa
2019
7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2019
Confined concrete; Fiber section; FRP wraps; Steel jackets; Stress-strain relationship
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Analytical model for concrete confined by steel stirrups and/or FRP jackets in rectangular sections / Braga, F.; D'Amato, M.; Gigliotti, R.; Laterza, M.. - 2:(2019), pp. 2769-2780. (Intervento presentato al convegno 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2019 tenutosi a Crete, Greece) [10.7712/120119.7108.19537].
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Utilizza questo identificativo per citare o creare un link a questo documento: `https://hdl.handle.net/11573/1454219`