Proc.Int.Conf.on Carrying Capacity of Steel Shell Structures (Eds. V.Krupka, P.Schneider), pp. 64-70, 1997


ON THE PLASTIC COLLAPSE BEAHVIOUR OF TUBULAR STELL STRUCTURES UNDER AXIAL COMPRESSION

M. Seitzberger, S. Wintschnig and F.G. Rammerstorfer


Abstract - This study deals with analytical and computational as well as experimental investigations of the progressive buckling of axially loaded circular and square tubular steel specimens. Different analytical models, based on kinematic methods of plasticity, are compared against each other and against finite element calculations as well as against experimental results, which were performed under different relatively slow compression speeds. It is shown that the compression speed has - even under quasi-static loading conditions - some influence on the load-displacement behaviour and on the buckling pattern. Regarding the structural effectiveness of such tubular members as energy absorbers the different cross-sectional shapes are compared against each other, too. Furthermore, some modifications are proposed, which are expected to deliver improvements of existing analytical and numerical procedures.


(hjb,971007)