COLUMN-BEAM JOINT STRUCTURE

To provide a column-beam joint structure capable of improving workability by omitting a reinforcing rib on a steel beam side with a lower beam depth even when a through diaphragm and a vertical haunch are provided on both sides of a steel pipe column to join steel pipe beams with different beam depths.SOLUTION: A column-beam joint structure comprises: an upper through diaphragm 11 joined to an upper flange portion 3b of the high steel beam 3 and an upper flange portion 4b of a low steel beam 4; a lower through diaphragm 12 joined to a lower flange portion 3c of the high steel beam 3; a vertical plate 13 joined to a location on a lower surface of a lower flange portion 4c of the low steel beam 4 and below a web portion 4a of the low steel beam 4; and a horizontal plate 14 joined to an end at the low steel beam 4 side of the lower through diaphragm 12, inclined from an end at the low steel beam 4 side toward the lower flange portion 4c of the low steel beam 4 at a right angle to the vertical plate 13, and joined so as to sandwich the vertical plate 13 on both the left and right sides.SELECTED DRAWING: Figure 1 【課題】鋼管柱の両側に梁せいが異なる鋼管梁を接合するために通しダイアフラムと共に鉛直ハンチを設ける場合でも、梁せいの低い鋼製梁側に補強リブを省略して、施工性を向上させることができる柱梁接合構造を提供する。【解決手段】高鋼製梁３の上側のフランジ部３ｂおよび低鋼製梁４の上側のフランジ部４ｂに接合される上側通しダイアフラム１１と、高鋼製梁３の下側のフランジ部３ｂに接合される下側通しダイアフラム１２と、低鋼製梁４の下側のフランジ部４ｃ下面であって低鋼製梁４のウエブ部４ａの下方となる箇所に接合される鉛直プレート１３と、下側通しダイアフラム１２における低鋼製梁４側の端部に接合されると共に、鉛直プレート１３に対し直角をなした状態で低鋼製梁４側の端部から低鋼製梁４の下側のフランジ部４ｃに向かって傾斜し、鉛直プレート１３を左右両側から挟むように接合される水平プレート１４とを備える。【選択図】図１