Buckling strength of multi-story sway, non-sway and partially-sway frames with semi-rigid connections

摘要: Abstract The objective of this paper is to propose a simplified approach the evaluation critical buckling load multi-story frames with semi-rigid connections. To that effect, analytical expressions and corresponding graphs accounting for boundary conditions column under investigation are proposed calculation effective length coefficient different levels frame sway ability. In addition, complete set rotational stiffness coefficients derived, which then used replacement members converging at bottom top ends in question by equivalent springs. All possible translational far end these members, featuring connection their near as well eventual presence axial force, considered. Examples sway, non-sway partially-sway connections presented, where found be excellent agreement finite element results, while application codes such Eurocode 3 LRFD leads significant inaccuracies.