The behavior of laced built-up columns made of aluminum alloy

摘要

The second-order analysis is used to examine the laced built-up member with two extruded I-sections under combined compression and bending.The member bottom end is fixed,and the upper one is free in the case of in-plane buckling.The member is restrained against out-of-plane buckling at both ends.The global initial sway imperfection is taken into account instead of the local bow imperfection.