A study on the behaviour of slender high-strength concrete columns subjected to eccentric compressive loading is presented. A suitable finite element model was used to predict the ultimate loads of the columns. This model takes into account the main non linear features of concrete and steel and the second order effects. The variables investigated in this study were: the concrete compressive strength fc (from 68 to 108 N/mm2), the quantities of longitudinal and transversal reinforcements, the slenderness ratio, and the eccentricity of the axial load. The numerical results were compared with the CEB model column method based on the moment-curvature relations and with the ACI moment amplification method. For the highest strengths concrete investigated, when the parable-rectangle diagram was used, the CEB method was found to be unsafe in some cases. However, using a constitutive law suitable for high strength concrete, this method gave acceptable approximations of the ultimate load. The ACI method was found to be very conservative and gave large discrepancies with respect to the CEB method, especially for high slenderness ratios and small eccentricities.

Resistenza di colonne snelle compresse in HSC: analisi numerica e affidabilità dei metodi semplificati di verifica / F. Angotti; L. Galano; M. Orlando; A. Vignoli. - STAMPA. - 2:(2000), pp. 707-717. (Intervento presentato al convegno 13° CONGRESSO C.T.E. tenutosi a Pisa ,Italia nel 9-11 novembre 2000).

Resistenza di colonne snelle compresse in HSC: analisi numerica e affidabilità dei metodi semplificati di verifica

ANGOTTI, FRANCO;GALANO, LUCIANO;ORLANDO, MAURIZIO;VIGNOLI, ANDREA
2000

Abstract

A study on the behaviour of slender high-strength concrete columns subjected to eccentric compressive loading is presented. A suitable finite element model was used to predict the ultimate loads of the columns. This model takes into account the main non linear features of concrete and steel and the second order effects. The variables investigated in this study were: the concrete compressive strength fc (from 68 to 108 N/mm2), the quantities of longitudinal and transversal reinforcements, the slenderness ratio, and the eccentricity of the axial load. The numerical results were compared with the CEB model column method based on the moment-curvature relations and with the ACI moment amplification method. For the highest strengths concrete investigated, when the parable-rectangle diagram was used, the CEB method was found to be unsafe in some cases. However, using a constitutive law suitable for high strength concrete, this method gave acceptable approximations of the ultimate load. The ACI method was found to be very conservative and gave large discrepancies with respect to the CEB method, especially for high slenderness ratios and small eccentricities.
2000
Atti del 13° Congresso C.T.E.
13° CONGRESSO C.T.E.
Pisa ,Italia
9-11 novembre 2000
F. Angotti; L. Galano; M. Orlando; A. Vignoli
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/10158
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