コンクリート充填角形鋼管柱・鉄骨梁接合部局部の弾塑性性状に関する研究

-　偏心接合された内ダイアフラム形式及び通しダイアフラム形式の荷重-変形関係モデル　-

抄録

 This paper proposes a new simple model for a load-displacement relation for predicting the local tensile elasto-plastic behavior of concrete-filled square steel tube column to steel beam eccentric moment connections using internal diaphragms or internal diaphragms with extended flanges. This model is developed by replacing two models of central moment connections. The central model proposed by the writer is provided by superposing the load-deformation relations of a tube flange and web. The tube flange is modeled as a grid beam with a tetra-linear load-deformation relation, while the tube web is modeled as a tensile member with a tetra-linear load-deformation relation. The strength of the internal diaphragm is superposed to the strength of these tube load-deformation models. Analytical results agree approximately with experimental results up to large deformations.