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为了解碳纤维增强复材布加固后梁柱节点的受力性能,在试验的基础上,采用有限元方法以揭示加固节点的抗剪性能和机理。计算结果和试验的对比表明:所采用的仿真分析方法能够反映加固节点的实际受力性能。对节点破坏模式、核心区箍筋应变水平和核心区混凝土应力分布等的分析表明,所采用的加固方法能够有效提高低配箍节点的抗剪性能。根据仿真分析揭示的节点工作机制,建立了碳纤维复材布加固节点的压杆-拉杆受力分析模型。
In order to understand the mechanical behavior of the beam-column joints after the carbon fiber reinforced composite sheet is strengthened, the finite element method is used to reveal the shear resistance performance and mechanism of the reinforced joints based on the experiment. The comparison of calculation results and experiments shows that the simulation analysis method used can reflect the actual stress performance of the reinforced joints. Analysis of failure modes, strain levels of core stirrups and stress distribution of core concrete in core area shows that the reinforcement method can effectively improve the shear resistance of low-profile hoop nodes. According to the working mechanism of nodes revealed by the simulation analysis, a stress-pull analysis model of the CFRP-reinforced joints was established.