接合部パネルの塑性変形が梁端部の弾塑性挙動に及ぼす影響: 2方向載荷を受ける鋼構造柱梁接合部の力学性能

摘要

In this paper, the structural characteristics of beam-to-column connection under bi-axial loadings are investigated by FEM analysis. Parameters are the structure shape and the loading pattern. First, the elasto-plastic behavior of each column, beam and joint panel in structure are investigated. Next, it is clarified that the plastic deformation of joint panel gives the influence to the elasto-plastic behavior of the flange connected part and the web connected part at beam-end. The analysis results show that the plastic deformation of the joint panel is a factor that reduces the bending strength of the beam-end. Finally, the full plastic bending strength of beam-end is evaluated by taking into consideration the influence of the plastic deformation of joint panel.%鋼構造柱梁接合部は，柱，梁，接合部パネル（以下，パネル）で構成されており，骨組全体の耐震性能を左右する最も重要な部位のひとつである.鋼構造ラーメン骨組では，十字形柱梁接合部のパネルは柱や梁に比べて耐力が弱い場合がほとんどであり,ト字形柱梁接合部でも柱や梁が単独で塑性化するより，むしろパネルの塑性化を伴う場合が多いことが指摘されている.パネルは柱と梁の両方に接合しているため，パネルの塑性変形が柱，梁それぞれの弾塑性挙動に及ぼす影響を明らかにしておく必要がある.