鉄骨ラーメンの弾塑性変形性状に及ぼす曲げねじれ座屈の影響

抄録

Mild steel portal frame specimens are tested under the constant vertical and monotonic or alternating horizontal loads in order to clarify the influence of the lateral-torsional buckling of the columns on inelastic behavior of steel frames. The frame specimens are assembled by welding from H-shaped columns and a rolled H-shaped beam. As the parameters, slenderness ratio about weak axis of a column and axial load ratio of the columns are selected. Twelve specimens are tested. Horizontal load earring capacity and deformation capacity are investieated.