- 何國瑞1,2，鄭 云2，吳 邁1
引用本文摘 ? 要：通過ABAQUS有限元分析軟件對鋼管珊瑚混凝土柱-鋼梁外加強環節點模型進行了非線性分析，以珊瑚混凝土強度和軸壓比為參數，分析了此類節點的破壞特征、梁端荷載-位移曲線、骨架曲線、剛度退化以及耗能性能。結果表明，不同珊瑚混凝土強度的節點剛度退化趨勢相同，隨著珊瑚混凝土強度的提高，節點的承載力和累計耗能均逐漸增大，但效果不明顯。軸壓比越大，累計耗能越小，軸壓比在0.2~0.4時，隨著軸壓比的增加，承載力下降不明顯，軸壓比大于0.4時，隨著軸壓比的增加，節點承載力下降迅速。不同參數下的鋼管珊瑚混凝土柱-鋼梁外加強環節點的滯回曲線均較為飽滿，具有很好的抗震性能和耗能能力，有廣泛的應用前景。 Abstract: Nonlinear analysis of coral concrete-filled steel tube column-steel beam joints with outer stiffening rings were carried out through ABAQUS finite element analysis software, considering the effect on the strength of coral concrete and axial compression ratio, failure characteristics, load-displacement curve at the end of beam, skeleton curves, stiffness degradation and energy dissipation performance were studied. The results show that the stiffness degradation trend of different coral concrete strength is the same, with the increase of coral concrete strength, the bearing capacity and cumulative energy consumption of the joints increase gradually, but the effect is not obvious. The larger the axial pressure ratio, the smaller the cumulative energy consumption, when the axial pressure ratio is 0.2~0.4, the bearing capacity decreases slowly with the increase of the axial pressure ratio, when the axial pressure ratio is greater than 0.4, the bearing capacity of the joints decreases rapidly with the increase of the axial pressure ratio. The hysteresis curves of coral concrete-filled steel tube column-steel beam joints with outer stiffening rings under different parameters are full, which has good seismic performance, energy dissipation ability, and wide application prospect.
何國瑞,鄭云,吳邁.鋼管珊瑚混凝土柱-鋼梁外加強環節點抗震性能有限元分析[J].混凝土與水泥制品,2020(8):75-80. HE G R,ZHENG Y,WU M.Finite Element Analysis of Seismic Performance of Coral Concrete-filled Steel Tube Column-steel Beam Joints with Outer Stiffening Rings[J].China Concrete and Cement Products,2020(8):75-80.