以4根自密实混凝土加固框架节点的试验研究为基础,采用有限元软件ABAQUS建立了自密实混凝土加固框架节点的非线性有限元模型,模型中考虑了材料非线性以及自密实混凝土材料的压碎,模拟结果与试验吻合较好.对影响节点极限承载力的初始受力进行了分析,结果表明,有限元模型可以很好地模拟自密实混凝土加固框架节点的抗震受力性能,框架节点的初始受力对节点的极限承载力有一定影响,其承载力随着初始受力的增大而减小.因此,加固设计时应予以考虑.%Based on the experimental study of 4 frame joints strengthened with self-compacting concrete,the finite element models of frame joints strengthened with self-compacting concrete are established by finite element software ABAQUS,considering the material nonlinear and crushing of concrete material,and the simulation results agree with experiment results.The effect of limit capacity of the joints is studied by analyzing the initial stress,the results indicate that:the finite element model can simulate the seismic behavior of frame joints strengthened by concrete,the initial load has some influence on the capacity of the strengthened joints,and the capacity decreases with the initial load,so the consolidation design should be considered.
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