Behaviour of slender high strength concrete filled tubular columns

In recent years an increment in the utilization of concrete tubular columns was produced due to its high stiffness, ductility and fire resistance. On the other hand the use of High Strength Concrete (HSC) is more common due to the advances in the technology The use of this material presents different advantages, mainly in elements subjected to high compressions as building supports or bridge columns. However, there is a notably lack of knowledge in the behavior of high strength concrete filled tubular columns which produces that the existing simplified design models for normal strength concretes are not valid for them. This paper presents the results of a research project, where a numerical and an experimental study of high strength CFT's is performed.