耐震スリットを有する鉄筋コンクリート造無開口壁が接合した梁の剛性評価 梁主筋端部の抜出しおよび付着劣化が降伏時剛性に及ぼす影響を仮定した場合

In this paper, girders with wall having seismic slits were modeled and a two-dimensional static elasto-plastic finite element analysis was performed. The parameters were girder section, span, main bar, concrete strength, slit wide and wall thickness. 111 models were analyzed. Key observations include the followings:(1) The stiffness K and α_y・K of girder with wall having seismic slit was large.(2) The effect of slit wide for the relationship between shear and relative displacement was small.(3) The effect of wall thickness for the elastic and plastic increasing ratio was small.(4) The effect of concrete strength for the elastic and plastic increasing ratio was small.(5) The elastic and plastic increasing ratio was derived by using the equations (9) and (10).