Artículos de revistas
Influence of concrete strength and length/diameter on the axial capacity of CFT columns
Fecha
2009Registro en:
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, v.65, n.12, p.2103-2110, 2009
0143-974X
10.1016/j.jcsr.2009.07.004
Autor
OLIVEIRA, Walter Luiz Andrade de
NARDIN, Silvana De
DEBS, Ana Lucia H. de Cresce El
DEBS, Mounir Khalil El
Institución
Resumen
This paper presents an experimental analysis of the confinement effects in steel-concrete composite columns regarding two parameters: concrete compressive strength and column slenderness. Sixteen concrete-filled steel tubular columns with circular cross section were tested under axial loading. The tested columns were filled by concrete with compressive strengths of 30, 60. 80, and 100 MPa, and had length/diameter ratios of 3, 5, 7, and 10. The experimental values of the columns` ultimate load were compared to the predictions of 4 code provisions: the Brazilian Code NBR 8800:2008, Eurocode 4 (EN 1994-1-1:2004), AINSI/AISC 360:2005, and CAN/CSA S16-01:2001. According to the results, the load capacity of the composite columns increased with increasing concrete strength and decreased with increasing length/diameter ratio. In general, the code provisions were highly accurate in the prediction of column capacity. Among them, the Brazilian Code was the most conservative, while Eurocode 4 presented the values closest to the experimental results. (C) 2009 Elsevier Ltd. All rights reserved.