An experimental investigation on the behaviour of sixteen short, confined, reinforced concrete columns with and without steel fibers has been carried out. The specimens were tested to failure at different strain rates under two loading schemes: uniform compression and eccentric compression with a constant eccentricity. The experimental results show that the presence of steel fibers delays the spalling load and increases the ultimate strength and the ductility; the thickness of the cover influences the peak load; the eccentricity of the applied axial load implies substantial variation in the peak load as well as in the ultimate strength and failure mode. The paper also shows that a numerical model, based on a suitable choice of constitutive laws for concrete and reinforcing steel bars, makes it possible to reproduce with good approximation level the experimental results that were obtained.
Analisi teorico - sperimentale del comportamento flessionale di colonne in calcestruzzo
FOSSETTI, MARINELLA;
2009-01-01
Abstract
An experimental investigation on the behaviour of sixteen short, confined, reinforced concrete columns with and without steel fibers has been carried out. The specimens were tested to failure at different strain rates under two loading schemes: uniform compression and eccentric compression with a constant eccentricity. The experimental results show that the presence of steel fibers delays the spalling load and increases the ultimate strength and the ductility; the thickness of the cover influences the peak load; the eccentricity of the applied axial load implies substantial variation in the peak load as well as in the ultimate strength and failure mode. The paper also shows that a numerical model, based on a suitable choice of constitutive laws for concrete and reinforcing steel bars, makes it possible to reproduce with good approximation level the experimental results that were obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
