Behaviour of slender fabricated high strength steel columns subjected to biaxial bending
The behavior of slender hollow and concrete filled steel columns fabricated with high-strength structural steel plate and subjected to biaxial bending is considered in the chapter. The chapter explains previous research findings for the use of high-strength quenched and tempered structural steel. Previous applications of high-strength steel in tall buildings throughout the world is described in the chapter. The experiments presented are compared with the currently available design methods for columns under biaxial loading as outlined in the existing European and Australian Standards. The results show that both of the standards are quite conservative in their prediction of ultimate loads. The models are therefore quite adequate for design, but there may be some scope for improvement on the method to allow optimization of the columns when used for this application. Further research is being conducted on high strength steel at high temperatures and under cyclic loading conditions to simulate fire and earthquake loading conditions respectively.