Behaviour of FRP confined concrete in square columns

A. de Diego; A. Arteaga; J. Fernández; R. Perera; D. Cisneros

doi:10.3989/mc.2015.05414

Autores/as

A. de Diego Eduardo Torroja Institute for Construction Science, CSIC
A. Arteaga Eduardo Torroja Institute for Construction Science, CSIC
J. Fernández Technical University of Madrid
R. Perera Technical University of Madrid
D. Cisneros Eduardo Torroja Institute for Construction Science, CSIC

DOI:

https://doi.org/10.3989/mc.2015.05414

Palabras clave:

Hormigón, Composite, FRP, Confinamiento, Resistencia a la compresión

Resumen

La mayoría de las investigaciones sobre hormigón confinado con FRP se han realizado sobre pilares de sección circular, pero el comportamiento en secciones cuadradas/rectangulares, donde el confinamiento es menos eficaz, es mucho menos conocido. Este trabajo presenta los resultados de un estudio experimental sobre probetas de hormigón de baja resistencia y sección cuadrada. Se han ensayado a compresión centrada diez probetas de tamaño intermedio. Los resultados indican que el confinamiento mejora significativamente la resistencia y ductilidad del hormigón en columnas de sección cuadrada con las esquinas redondeadas. El incremento de resistencia es mayor cuanto menor es la resistencia del hormigón sin confinar y también aumenta con la rigidez del encamisado. Los resultados se compararon con los obtenidos según los modelos teóricos más aceptados. Hay dos parámetros críticos en el ajuste de los modelos: el factor de eficiencia de la deformación y el efecto de confinamiento en secciones no circulares.

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