開口を有する正方形短柱鋼管の局部座屈強度に関する実験的研究 : 軸心圧縮の場合

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This paper is concerned with a compression experiment on carbon steel square pipes each with circular holes in a short column range, supported with spherical seat. An emperical formula for calculating axial compressive buckling stress "σ_<crh>" of the carbon steel square pipes with a circular hole presented is as follow; σ_<crh>/σ_<cr>=l-a_0(d/b)^b_0 where σ_<cr>=axial compressive buckling stress of the carbon steel square pipes without circular hole, a_0 and b_0=coefficient of wall number with a circular hole, b=mean distance between walls, d=diameter of circular hole. Consideration has been given to the design diagram which is the combination of the analysis based on the energy method with the finite element method, boundary element method and experimental result. The measurement reveals that this dergram is good data, and is in good agreement with those obtained experimentally for the short column range.
東海大学の論文