局部座屈を考慮した箱形断面鋼骨組構造物の強度

抄録

A numerical study is presented on the strength of unbraced steel framed structures with local buckling. A finite element program has been developed to trace up to collapse the inelastic behavior of steel framed structures by using moment-thrust-curvature curves of locally buckled stub-columns computed by the authors. The numerical results are compared with the design formulas considering the decrease in the strength due to local buckling. An examination is also made on the influence of the modifications of the effective length factor K and the equivalent moment ratio C_m. As a result, a better design formula has been obtained.