In the present paper the focus is on the compressive response of short high strength reinforced concrete members having circular transverse cross-sections and reinforced with longitudinal steel bars and transverse spirals. An analytical model is proposed which allows one to estimate the confinement pressures exerted by transverse steel and by longitudinal bars during the loading process, considering the interaction of the spirals with the inner core both in the plane of the transverse steel and in the space between two successive pitches. Yielding of steel spirals and longitudinal bars including buckling phenomena and damage to the concrete core are also considered by means of variation in the elastic modulus and in the Poisson’s coefficient. The proposed mechanical model is able to reproduce the load-shortening curves of compressed members; it gives good agreement with several experimental data and with analytical results obtained by using other recent models available in the literature.

Influenza delle armature sul comportamento in compressione di colonne in calcestruzzo ad alta resistenza

FOSSETTI, MARINELLA;
2010

Abstract

In the present paper the focus is on the compressive response of short high strength reinforced concrete members having circular transverse cross-sections and reinforced with longitudinal steel bars and transverse spirals. An analytical model is proposed which allows one to estimate the confinement pressures exerted by transverse steel and by longitudinal bars during the loading process, considering the interaction of the spirals with the inner core both in the plane of the transverse steel and in the space between two successive pitches. Yielding of steel spirals and longitudinal bars including buckling phenomena and damage to the concrete core are also considered by means of variation in the elastic modulus and in the Poisson’s coefficient. The proposed mechanical model is able to reproduce the load-shortening curves of compressed members; it gives good agreement with several experimental data and with analytical results obtained by using other recent models available in the literature.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11387/19540
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