Strength and ductility of confined concrete columns under axial load and biaxial bending

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Abstract

The behaviour of prismatic reinforced concrete columns under increasing eccentric compression load wasexperimentally investigated and analytically modelled. Columns with distributed longitudinal reinforcement andclosely spaced transverse reinforcement were tested up to failure, considering different values and directions ofeccentricity. Preliminary tests were carried out under concentric compression in order to validate the choice ofthe stress-strain laws adopted for the confined concrete and the longitudinal steel bars in compression. In thepaper, closed form expressions able to approximate the experimental results in the case of uniaxial bending arepresented. Finally, a fibre numerical model is utilized for the cases of biaxial bending. The results show thereliability of the analytical models and suggest further studies to relate analytically the components of ultimatebending moment and curvature, in the cases of biaxial bending, to the values corresponding to two separate casesof uniaxial bending under the same level of compression.
Original languageEnglish
Number of pages10
Publication statusPublished - 2012

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Axial loads
Ductility
Reinforcement
Concretes
Reinforced concrete
Numerical models
Analytical models
Compaction
Steel
Fibers

Cite this

@conference{e015e43fae1d42e9bb41fc00b234b449,
title = "Strength and ductility of confined concrete columns under axial load and biaxial bending",
abstract = "The behaviour of prismatic reinforced concrete columns under increasing eccentric compression load wasexperimentally investigated and analytically modelled. Columns with distributed longitudinal reinforcement andclosely spaced transverse reinforcement were tested up to failure, considering different values and directions ofeccentricity. Preliminary tests were carried out under concentric compression in order to validate the choice ofthe stress-strain laws adopted for the confined concrete and the longitudinal steel bars in compression. In thepaper, closed form expressions able to approximate the experimental results in the case of uniaxial bending arepresented. Finally, a fibre numerical model is utilized for the cases of biaxial bending. The results show thereliability of the analytical models and suggest further studies to relate analytically the components of ultimatebending moment and curvature, in the cases of biaxial bending, to the values corresponding to two separate casesof uniaxial bending under the same level of compression.",
author = "Piero Colajanni and Liborio Cavaleri and {Di Trapani}, Fabio and Maurizio Papia and Giuseppe Macaluso",
year = "2012",
language = "English",

}

TY - CONF

T1 - Strength and ductility of confined concrete columns under axial load and biaxial bending

AU - Colajanni, Piero

AU - Cavaleri, Liborio

AU - Di Trapani, Fabio

AU - Papia, Maurizio

AU - Macaluso, Giuseppe

PY - 2012

Y1 - 2012

N2 - The behaviour of prismatic reinforced concrete columns under increasing eccentric compression load wasexperimentally investigated and analytically modelled. Columns with distributed longitudinal reinforcement andclosely spaced transverse reinforcement were tested up to failure, considering different values and directions ofeccentricity. Preliminary tests were carried out under concentric compression in order to validate the choice ofthe stress-strain laws adopted for the confined concrete and the longitudinal steel bars in compression. In thepaper, closed form expressions able to approximate the experimental results in the case of uniaxial bending arepresented. Finally, a fibre numerical model is utilized for the cases of biaxial bending. The results show thereliability of the analytical models and suggest further studies to relate analytically the components of ultimatebending moment and curvature, in the cases of biaxial bending, to the values corresponding to two separate casesof uniaxial bending under the same level of compression.

AB - The behaviour of prismatic reinforced concrete columns under increasing eccentric compression load wasexperimentally investigated and analytically modelled. Columns with distributed longitudinal reinforcement andclosely spaced transverse reinforcement were tested up to failure, considering different values and directions ofeccentricity. Preliminary tests were carried out under concentric compression in order to validate the choice ofthe stress-strain laws adopted for the confined concrete and the longitudinal steel bars in compression. In thepaper, closed form expressions able to approximate the experimental results in the case of uniaxial bending arepresented. Finally, a fibre numerical model is utilized for the cases of biaxial bending. The results show thereliability of the analytical models and suggest further studies to relate analytically the components of ultimatebending moment and curvature, in the cases of biaxial bending, to the values corresponding to two separate casesof uniaxial bending under the same level of compression.

UR - http://hdl.handle.net/10447/78968

M3 - Other

ER -