Behaviour and design of fabricated high strength steel columns subjected to biaxial bending. Part 1: Experiments

This paper considers the behaviour of hollow and concrete filled steel columns fabricated with high strength structural steel plate and subjected to biaxial bending. The columns considered in this paper are fabricated from high strength quenched and tempered structural steel plate of nominal yield stress of 690 (N/mm2). An extensive series of experiments on short and slender hollow and concrete filled steel composite columns has been carried out under biaxial bending. The principal parameter that has been considered in the test program is the slenderness of the component plates. The experiments did reveal the beneficial effect of the use of concrete infill on delaying the onset of local buckling and thereby the post-local buckling behaviour of the columns.