曲げを受ける柱の終局耐力式を用いた単層2方向格子シェルの断面設計

概要

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The present paper proposes a method for designing member sections in a two-way grid shell of single layer against a specified ultimate buckling load. The method is applicable for not only uniform but also unbalanced load. To consider significant bending effects explicitly, a strength formula for beam-columns that is given in the LSD recommendation of All is adopted as the design formula. Moreover, to cope with the significant geometric nonlinear behavior, elastic nonlinear FEM analysis, which becomes easily available today, is applied as the principal tool for the method. The procedure is composed of three principal job steps. First, to obtain the generalized slendemess, the preliminary elastic buckling analysis is performed in which the section of each member in an analyzed model is given proportionally to its axial force. Second, the stress analysis in which the section rigidities in the model are assumed to prevent the excessive geometric nonlinear effect at the design point is performed. Finally, the member sections are determined based on both the generalized slendemess and design stresses applying the ultimate strength formula for beam-columns.
社団法人日本建築学会の論文
2003-02-28