SCALLOP AND BEAM END FIELD JOINT USING THE SAME

To provide a scallop and a beam end field joint which inhibit strain concentration from occurring at a bottom of the scallop and inhibit occurrence of a scallop bottom crack and a flange fracture without requiring any other structure for reinforcement.SOLUTION: A scallop 60 includes: a first opening end 60a; a second opening end 60b; and a first opening edge part 61 extending in a direction away from a web end from the first opening end 60a; a second opening edge part 62 extending in the aforementioned direction from the second opening end 60b; and a third opening edge part 63 connecting the first opening edge 61 and the second opening edge part 62. The first opening edge part 61 is formed in a circular arc shape intersecting a web 10 side weld toe part of a fillet part 30, and has a first circular arc part 71 having a tangent parallel to an inner surface of a lower flange 20 at one end on the first opening end 60a side. The third opening edge part 63 has a second circular arc part 72 formed in a circular arc shape connecting the first opening edge part 61 and the second opening edge part 62. A radius of curvature of the first circular arc part 71 is larger than the radius of curvature of the second circular arc part 72.SELECTED DRAWING: Figure 4 【課題】補強するために別の構成を設けなくてもスカラップ底へのひずみ集中を抑制しスカラップ底へのき裂発生やフランジ破断を抑制するスカラップ及び梁端現場接合部を提供する。【解決手段】スカラップ６０は、第一の開口端６０ａと、第二の開口端６０ｂと、第一の開口端６０ａからウェブ端部から離れる向きに延びる第一の開口縁部６１と、第二の開口端６０ｂから前記向きに延びる第二の開口縁部６２と、第一の開口縁部６１と第二の開口縁部６２とを接続する第三の開口縁部６３とを有し、第一の開口縁部６１は隅肉部３０のウェブ１０側止端部と交差する円弧状に形成され、第一の開口端６０ａ側一端で接線が下フランジ２０の内面と平行となる第一の円弧部７１を有し、第三の開口縁部６３は、第一の開口縁部６１と第二の開口縁部６２とを接続する円弧状に形成された第二の円弧部７２を有し、第一の円弧部７１の曲率半径が第二の円弧部７２の曲率半径より大きい。【選択図】 図４