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■■■■■■■■■■■■■■■■■■■ 川崎製鉄技報 KAWASAKI STEEL GIHO Vol.25 (1993) No.3 ■■■■■■■■■■■■■■■■■■■ |
| 部分溶込み溶接角鋼管柱の弾塑性挙動と設計法 Elastic-Plastic Behaviour and Design of Box Column Built-up by Partial Penetration Welds 山本 昇(Noboru Yamamoto) 井上 末富(Suetomi Inoue) 橋本 順次(Junji Hashimoto) |
| 要旨 : 建築構造用溶接組立角鋼管柱の製作コスト低減を目標として，角鋼管柱のかど溶接を全線部分溶込み溶接とした場合の必要溶込み深さについて検討した。柱はり接合部に関する部分架構実験と弾塑性有限要素解析を実施したが，有限要素解析では，かど溶接を非線形せん断ばねモデルに置換して得られた接合部挙動は実験結果と良好に一致した。これより，柱はり接合部の降伏メカニズムを明らかにし，かど溶接の降伏耐力の評価式を導いた。この評価式によれば実験耐力を良好に近似できることが判明した。かど溶接の必要溶込み深さを決定するための設計手順を提案した。 |
| Synopsis : Thick-walled built-up RHS tubes are widely used for columns of high-rise buildings. In assembling tubes, full-penetration groove welds have usually been applied to corner seam welds, specifically, in the beam-connected region due to the lack of a suitable design method. to establish and economical design method by employing partial penetration groove welds, experimental and finite element analysis were conducted on the plastic behaviour of connection between the beams and the RHS column. In the analysis, a numerical model for the elastic-plastic shear behaviour of corner seam welds derived from small fracture tests was used. Based on the assumed yield mechanism of the connection, theoretical yield strengths are estimated in terms of the strength of welds, and compared with those obtained by the experiment. The result shows that the estimated strengths give good agreement with the experimental values. Therefore, the design method is verified to be practical for the seam welds. |
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