Inelastic Behavior of Steel Beam-Columns of Box Section under the Constant Vertical and Alternating Horizontal Loads

Steel beam-columns of box section are tested under the constant vertical and two-dimensional monotonic or cyclic horizontal loads. Experimental behavior is compared with the results of elasto-plastic and rigid-plastic analyses. It is shown that the post local buckling behavior of specimens with large values of width-thickness ratio B/t is well predicted by the rigid-plastic analysis considering the influence of local buckling, and that the conventional strength formula is too conservative