繰返し荷重を受ける鋼構造架構の弾塑性解析

Abstract

A practical method of analysing a braced- and/or unbraced-steel frame under repeated horizon-tal load is presented. The influence of the Bauschinger's effect and the strain hardening, which arecharacteristic of structural steel, is reasonably reflected in the result. The member stiffness equationfor an unbraced frame is expressed in a simple form by neglecting the variation of member axialforce. For a braced frame, the governing equations are obtained taking into account of the variationof member axial forces and large deformations of brace members, where the optimum increment ofthe step-by-step computation is obtained as the solution of the non-linear simultaneous equations.The computed results agree reasonably well with the experimental results.