[2047] アンボンド・プレキャスト・プレストレストコンクリート十字形架構の柱梁接合部における曲げ終局モーメントの評価法
キーワード：unbond post-tensioning tendon、pcapc construction method、beam-column joint、joint-hinging failure、kinematic model
鉄筋コンクリート造柱梁接合部降伏破壊に関する9自由度モデルに基づいて，柱梁接合部における応力分布が点対称ではない一般的な場合を想定し，アンボンドPCaPC架構における柱梁接合部の曲げ終局モーメントの算定式を導いた。アンボンドPCaPC平面十字形試験体2体，スラブ付き十字形試験体1体合計3体の試験体の加力実験の結果と前述した算定法による計算結果とを比較し，提案した算定法の妥当性を検討した。また，柱梁接合部曲げ終局モーメントに大きく影響を与える因子を変数とした解析を行って，アンボンドPCaPC造における柱梁接合部降伏破壊の発生有無の可能性を理論的に検討した。
The ultimate moment at joint-hinging failure was evaluated for an interior beam-column joint in unbonded precast prestressed concrete frames based on the nine DOF kinematic model, originally proposed by Shiohara and Kusuhara and revised by authors. The ultimate joint-hinging moment computed by the proposed method was compared with past test results. Probability of joint-hinging failure of unbonded PCaPC cruciform joints was investigated through a parametric study where sectional-area of unbonded tendons or column longitudinal bars and column axial load varied.
The ultimate moment at joint-hinging failure was evaluated for an interior beam-column joint in unbonded precast prestressed concrete frames based on the nine DOF kinematic model, originally proposed by Shiohara and Kusuhara and revised by authors. The ultimate joint-hinging moment computed by the proposed method was compared with past test results. Probability of joint-hinging failure of unbonded PCaPC cruciform joints was investigated through a parametric study where sectional-area of unbonded tendons or column longitudinal bars and column axial load varied.