Zhan H, Ye M, Jiang J, Gao Y, Zheng C W, Duan S C
Research Centre of Wind Engineering and Engineering Vibration, Guangzhou University, Guangzhou, 510006, China.
Department of Civil Engineering and Smart Cities, Shantou University, 515063, China.
Heliyon. 2024 Mar 5;10(5):e27308. doi: 10.1016/j.heliyon.2024.e27308. eCollection 2024 Mar 15.
A novel type of detachable precast concrete column-column joint (DPC) is proposed in this study to solve the problems in current column-column dry connections including complex load path, uncertainty of structural stiffness of beam-column joints and inconvenience for disassembly. The dry connection technology is applied by composing of steel plate and concrete. Finite element models of DPC were created to study its structural performance including hysteresis curve, skeleton curve, ductility, and energy dissipation capacity. The benchmark models are firstly established and validated against the test data and after that a small-scale parametric study is prepared. The effect of axial pressure ratio and eccentricity distance size on the seismic performance of DPC was studied. Results indict that the optimal value of axial pressure ratio ranges from 0.5 to 0.7. With increase of the axial pressure ratio, the ductility coefficient shows a decreasing trend in general. The eccentricity has little effect on the energy dissipation capacity of the joint.
本研究提出了一种新型的装配式预制混凝土柱-柱节点（DPC），以解决当前柱-柱干式连接中存在的问题，包括传力路径复杂、梁柱节点结构刚度不确定以及拆卸不便等。干式连接技术通过钢板和混凝土组合应用。建立了DPC的有限元模型，以研究其结构性能，包括滞回曲线、骨架曲线、延性和耗能能力。首先建立基准模型并根据试验数据进行验证，然后进行小规模参数研究。研究了轴压比和偏心距大小对DPC抗震性能的影响。结果表明，轴压比的最佳值范围为0.5至0.7。随着轴压比的增加，延性系数总体呈下降趋势。偏心距对节点的耗能能力影响较小。
