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对装设扇形铅粘弹性阻尼器的预制装配式混凝土框架梁柱节点进行了数值仿真分析,并与试验结果进行了对比,验证数值仿真分析的正确性;对比分析了普通预制节点与消能减震梁柱节点的抗震性能,并分析了不同设计参数对消能减震节点构件抗震性能的影响。分析结果表明:与普通预制节点相比,扇形铅粘弹性阻尼器在一定程度上提高了节点的初始刚度和承载力,增强了构件的耗能能力;随着轴压比的增加,混凝土材料应力下降明显;随着铅芯直径、橡胶硬度以及扇形半径的增加,构件抗震性能提高,但当阻尼器扇形半径超过某一数值时,构件抗震性能还会出现降级现象。
The numerical simulation analysis of precast prefabricated concrete frame beam-column joints with fan-shaped lead viscoelastic dampers was carried out. The results were compared with the experimental results to verify the correctness of the numerical simulation analysis. The seismic performance of the beam-column joints, and the influence of different design parameters on the seismic performance of the members with dissipating energy and damping were analyzed. The results show that, compared with common prefabricated joints, the fan-shaped lead-based viscoelastic dampers can improve the initial stiffness and bearing capacity of the joints to a certain extent and enhance the energy dissipation capacity of the members. With the increase of axial compression ratio, the stress of concrete The seismic performance of the members increases with the increase of the diameter of the lead, the hardness of the rubber and the radius of the fan. However, when the fan radius exceeds a certain value, the seismic performance of the members will be degraded.