座屈と塑性を考慮した最小重量設計 : 第2報ウェブの曲げおよび剪断座屈をともなうガーダーの崩壊荷重

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In the Previous report the authors showed a method of plastic analysis of plate girders in postbuckling subjected to shear force.Herein we present a simplified method to determine the collapsing load of plate girders in postbuckling under pure bending.Namely m_u=m_<cr>+β(1-m_<cr>) where, m_u=M_u/M_Y, m_<cr>=M<cr>/M_Y M_u : Ultimate bending moment M_<cr> : Web buckling moment.M_Y : Flange yielding moment.β : Effectiveness of section modulus in postbuckling.The results of tests carried out by the authors, as well as the other research organizations are compared with the theory which showed a good agreement.A modified interaction curve for collapsing in postbuckling under bending moment and shearing force was introduced.
社団法人日本船舶海洋工学会の論文