鉄骨充腹ばりの横座屈に関する研究(その2) ―プラスチック模型を用いた弾性実験―

Abstract

Elastic buckling tests of H-shaped beams were conducted using plastics miniature models.Test specimens were made of an Acrylite sheet with 2 mm thickness. The effects of bending mo-ment gradient on the lateral buckling strength of a beam were examined experimentally for threetesting span lengths and three end-moment ratios. Numerical studies were performed by means offinite difference method in order to obtain the lateral buckling load of the beam. Experimentalbuckling loads were compared with the calculated values by the present authors and other investiga-tors. The lateral force exerted by the bracings was about 1-5% of the compression resultant forceby bending moment in the beam cross-section.