Structural behavior of cold-formed steel semi-oval hollow section beams

摘要: Abstract The structural behavior of cold-formed steel semi-oval hollow sections under bending was studied through experimental and numerical investigation. investigated in this study were from hot-extruded seamless carbon circular sections. A total 20 beams tested for both four-point three-point configurations. bent about the major axis positive negative directions. tests replicated numerically by means rigorous finite element analyses. Based on validated model, an extensive parametric conducted 198 beam specimens with a wide range cross-section geometries subjected to pure current design rules structures, such as Australian/New Zealand standards, European codes well American North specifications, do not cover Therefore, ultimate flexural capacities obtained test program investigation only compared strengths predicted Direct Strength Method Continuous Method. applicability reliability these two methods evaluated analysis. results show that existing provide quite conservative scattered strength predictions section beams. In study, modifications are proposed, which better improved accuracy reliable manner.