水平荷重時における角形鋼管柱・H形はり接合部の耐力評価 : 角形鋼管柱溶接接合部の実験的研究3

抄録

It is important to proportion the details of RHS-column to H-beam connections not only for shear failure of joint panels but also for local failure of connections, when these connections are subjected to horizontal force. The present paper examines the interaction between the shear failure of joint panels and local failure of connections with exterior diaphragm. The connections with insufficient diaphragm faile according to the local failure, that is the local collapse of column, crack in weld and the local buckling of diaphragm. The deformation capacity and the absorbed energy of these connections are less than those of connections with shear failure of joint panels. The following formulae are suggested for estimate the strength of connections For yield strength : when M_<Ly>/M_<Py><1.0 M_<cy>=M_<Ly>…(8) when M_<Ly>/M_<Py>≧1.0 M_<cy>=M_<Py>…(9) For maximum strength : when M_<LU>/M_<Py><1.7 M_<cu>=0.78M_<LU>…(10) when M_<LU>/M_<Py>≧1.7 M_<cu>=1.33M_<Py>…(11) It is necessary to satisfy the following condition in order to prevent the premature local failure of connections. (B/2+h_D)/t_D≦24/√<σ_<yD>>, M_<Ly>/M_<Py>≧1.0