This paper deals with the evaluation of the increase in strength and ductility of compressed concrete columns reinforced with the use of Fiber Reinforced Polymer and Fiber Reinforced Cementicious Mortar jackets. There are many analytical confinement models available in literature useful to evaluate the mechanical properties of the confined element. In these models the confined strength and ductility are obtained as a function of the lateral confinement pressure that depends of numbers of layers in the jacket, the mechanical properties of the fibers and the corner radius ratio. However, although these models agree with some experimental results, they are calibrated on a limited number of experimental tests and models from different authors may give very different results. In order to overcome this uncertainty in the present paper a simplified procedure to evaluate the effects of the jackets is proposed; the procedure is based on the results of several experimental tests of different authors and the confined strength/ductility is provided as a function of the corner radius ratio and fiber volumetric ratio. The procedure does not need the evaluation of the lateral confinement pressure, results agree very well with experimental data and results are available for practical purposes.

Evaluation of the mechanical properties of the concrete columns confined with FRP and FRCM systems in compression

Fossetti M.
;
Alotta G.;Basone F.;D'ARENZO, GIUSEPPE;Macaluso G.;SICILIANO, ALFIO FRANCESCO
2017

Abstract

This paper deals with the evaluation of the increase in strength and ductility of compressed concrete columns reinforced with the use of Fiber Reinforced Polymer and Fiber Reinforced Cementicious Mortar jackets. There are many analytical confinement models available in literature useful to evaluate the mechanical properties of the confined element. In these models the confined strength and ductility are obtained as a function of the lateral confinement pressure that depends of numbers of layers in the jacket, the mechanical properties of the fibers and the corner radius ratio. However, although these models agree with some experimental results, they are calibrated on a limited number of experimental tests and models from different authors may give very different results. In order to overcome this uncertainty in the present paper a simplified procedure to evaluate the effects of the jackets is proposed; the procedure is based on the results of several experimental tests of different authors and the confined strength/ductility is provided as a function of the corner radius ratio and fiber volumetric ratio. The procedure does not need the evaluation of the lateral confinement pressure, results agree very well with experimental data and results are available for practical purposes.
978-886741-8541
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11387/129001
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