両端ピン支持の立体構成されたアーチ状鋼構造の弾塑性座屈荷重評価

概要

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In the present paper, an effective approach is proposed to evaluate elasto-plastic buckling loads of pin supported arch-like space frames. The approach is based on a concept of column buckling strength considering geometric imperfection sensitivity. The procedure is almost similar to column buckling for tall buildings except for imperfection sensitivity. Firstly, a linear buckling load is required. Secondly, an appropriate value for a knock down factor for the elastic buckling is assumed considering the imperfection sensitivities. Thirdly, one member, called as a specific member (m), is selected as the most relevant to buckling. Fourthly, based on the elastic buckling axial force of the specific member (m), a generalized slenderness is evaluated. The generalized slenderness is utilized to obtain the compressive strength, in other words, a concept for column buckling strength is utilized in term of generalized slenderness. Finally, based on the column buckling strength, the elasto-plastic buckling loads are evaluated. Using a systematic FEM analysis, the effectiveness is proven for design use for such structures
一般社団法人日本建築学会の論文
2009-03-27