Behaviour and design of high strength steel-concrete filled box columns

This paper deals with the behaviour and design of high strength steel-concrete filled box columns. A set of design procedures is outlined for short concrete filled high strength steel box columns which considers the inherent differences between mild and high strength steel. A cross-sectional analysis procedure is developed to study the ductility of such columns. Thrust-moment-curvature relationships are developed and a set of strength interaction diagrams have been obtained which are useful in the design of short columns for strength. Issues such as increased lettable floor area and savings in weight are calculated and discussed as being major advantages of the implementation and use of high strength steel in concrete filled box columns for the use in tall buildings construction.