Behaviour of the Tubular Columns Filled by Concrete Subjected to Buckling Compression

Published on Jan 1, 2012in Procedia Engineering
· DOI :10.1016/J.PROENG.2012.07.057
P. Bukovsk1
Estimated H-index: 1
(Brno University of Technology),
M. Karmazínov1
Estimated H-index: 1
(Brno University of Technology)
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Abstract
This paper deals with the possibility of using high strength concrete in steel tubular columns filled with concrete subjected to compression. The effect of concrete strength on buckling resistance of the composite columns is investigated. The behaviour of the compressed tubes filled by high strength concrete is compared with that filled by normal strength concrete. The combination of circular tubes and high-strength concrete seems to be an effective way to use high-strength concrete because of eliminating the lack of tensile strength. In the case of high-strength concrete, the tensile strength is growing, not in proportion to compressive strength, but more slowly. This means that a large increase in compressive strength is not accompanied by a corresponding increase in tensile and shear strength in comparison with normal strength concrete. The confinement of the concrete core by the steel shell leads to the prevention of shear or tension failure whereas high compressive strength can be activated. This paper includes interpretation and evaluation of the results of experimental analysis. The paper also includes the results of a numerical model which has been developed to ensure consistency of the output of the numerical calculation and the data obtained with the test specimens.
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#1Marcela Karmazínová (Brno University of Technology)H-Index: 6
#2Jindrich Melcher (Brno University of Technology)H-Index: 5
The paper is focused on the problems of the philosophy, methodology and application of the design assisted by testing. In this paper the examples of the application of the methods for the design resistance determination based on this approach are shown, mainly. The examples presented here are especially oriented to the determination of the design resistance of steel and steel-concrete composite columns composed of high-strength materials and the comparison of these two cases from the viewpoint o...
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#1Marcela Karmazínová (Brno University of Technology)H-Index: 6
The paper deals with the problems of the load-carrying capacity of steel and steel-concrete composite members composed of high-strength materials, subjected to compression. The attention is mainly paid to the buckling resistance in the connection with member imperfections, which are usually covered by the equivalent initial geometrical imperfection expressed as the maximal initial member curving in the mid-length of the buckled member subjected to compression. The paper is oriented to the analyt...
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