[2057] A Study on the rational reinforcement design for L-shaped beam-column joints with beam-top longitudinal bars linearly anchored into the joint using mechanical anchorage
Keywords:鉄筋コンクリート、最上階外柱梁接合部、梁曲げ降伏、機械式定着、定着破壊、静的載荷実験
本研究では，梁主筋を定着板を用いて直線定着したL形柱梁接合部における梁上端主筋拘束筋の合理的な設計に関する検討を行った。接合部のせん断変形に伴う斜め圧縮力に抵抗するため梁上端主筋に拘束筋を設ける方法を提案しており，斜め圧縮力の作用角度に基づき合理的に拘束筋量を検討した。拘束筋量（拘束筋間隔）を変数とする3体の試験体の静的載荷実験を実施した結果，拘束筋量が構造性能及び定着破壊の発生に与える影響が明らかとなり，合理的な拘束筋設計における新たな知見が得られた。
This study investigates the rational reinforcement design for beam top longitudinal bars in L-shaped beam-column joints where the beam longitudinal rebar is linearly anchored into the joint using mechanical anchorage. A method was proposed to install restraining bars on the beam top longitudinal bars to resist diagonal compressive forces (uplifting forces) caused with shear deformation of the joints. Assuming angles of the diagonal compressive force, the required quantities of restraining bars were theoretically evaluated. Static loading tests were conducted on three specimens with varying restraining bar quantities (restraining bar spacing). The results clarified the influence of restraining bar quantities on the specimen performance and the occurrence of anchorage failure, providing new experimental data for rational restraining bar design.
This study investigates the rational reinforcement design for beam top longitudinal bars in L-shaped beam-column joints where the beam longitudinal rebar is linearly anchored into the joint using mechanical anchorage. A method was proposed to install restraining bars on the beam top longitudinal bars to resist diagonal compressive forces (uplifting forces) caused with shear deformation of the joints. Assuming angles of the diagonal compressive force, the required quantities of restraining bars were theoretically evaluated. Static loading tests were conducted on three specimens with varying restraining bar quantities (restraining bar spacing). The results clarified the influence of restraining bar quantities on the specimen performance and the occurrence of anchorage failure, providing new experimental data for rational restraining bar design.