H形鋼を用いた長方形ラーメンの弾塑性安定に関する実験的研究(その2)

Abstract

An experimental study is made of the behavior of a single-bay two-story end-fixedframes subjected to vertical and horizontal loads, using mild steel wide-flange sections.The beam length and column height are equal and they are 100cm. The ratio of thecolumn height to the radius of gyration is about 24 and the moment of inertia of thebeam is equal to or 0.45 times that of the column. Vertical loads are applied symmet-rically to the tops of the columns, being kept constant at about 18% or 35% of the yieldload of a column. The maximum horizontal load, applied at the tops of a frame, isfound to be nearly 10-15% larger than that predicted by the elastic-perfectly plastictheory which takes account of the axial forces of the columns.