Behaviour of steel reinforced concrete columns with high strength materials

Abstract

High strength construction materials are now attractive for composite steel-concrete construction due to their economic and architectural advantages. However, the current design codes for Steel Reinforced Concrete (SRC) columns are in general only applicable to normal strength materials. It is only allowed in Eurocode 4 (EC4) for concrete class C20/25-C50/60 and steel grades S235-S460 to be used in composite columns. On the other hand, it is permissible in Eurocode 2 (EC2) for higher strength concrete (up to C90/105) while Eurocode 3 (EC3) steel grade up to

Development of analytical model for predicting compressive behavior of engineered cementitious composites‐concrete encased steel composite columns

“…In Equation ( 6), t f is the flange thickness and l is half of the flange width minus the web thickness. Since the degree of confinement by the steel section was found to vary at different parts of HCC, 15,22,23 researchers have suggested to use effective lateral pressure (f 0 le,s ) such that:…”

“…The height of parabola can be taken equal to (d-2t f )/4, where d is the total depth of steel section. 22 Note that distribution of HCC area shown in Figure 5 is used for calculations of k es only. In order to simplify the analytical modeling calculations, the HCC area is taken as total area (A tcf ) between the flanges (Figure 2).…”

“…In Equation (), t f is the flange thickness and l is half of the flange width minus the web thickness. Since the degree of confinement by the steel section was found to vary at different parts of HCC, 15,22,23 researchers have suggested to use effective lateral pressure ( f ′ le, s ) such that: where A tcf and A pcf are the total and parabolic areas of concrete between the steel flanges, respectively (Figure 5). The height of parabola can be taken equal to ( d ‐2 t f )/4, where d is the total depth of steel section 22 .…”