Abstract
The strength of beam-columns depending on local buckling of plate elements is investigated by the FEM analysis including both geometrical and material nonlinearities. The local buckling strength of thin-walled sections is evaluated by considering interactive effects between flanges and webs. By introducing the local buckling effects to European interaction formula, a simple and exact method to evaluate the load carrying capacity of beam-columns with box section is developed. And the proposed method is compared with several existing specifications.
