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系锚碳纤维布(简称CFRP)间接加固混凝土框架节点方法能够有效避免直接粘贴加固CFRP易剥离、难以在实际工程中实施等缺陷。通过对5个系锚CFRP间接加固节点在滞回曲线、节点承载力和延性系数等方面的有限元数值模拟对比分析,探讨节点梁端箍筋配箍率、纵向CFRP条带用量及横向CFRP条箍用量等参数对节点抗震性能的影响。分析结果表明:梁柱端间接加固的系锚CFRP能明显改善节点的抗震性能,其极限承载能力和梁端位移延性系数提高幅度分别达到19.8%和55.5%;在其他参数相同的情况下,增加梁端纵向CFRP条带的配置率能同时提高加固节点的抗震延性和承载能力,梁端箍筋配箍率能显著改善其抗震延性,梁柱端横向CFRP条箍配置率对加固节点的抗震延性和承载能力的提高作用不大,但能有效延缓纵筋的屈服和黏结滑移。
The anchoring carbon fiber cloth (CFRP) indirectly reinforces the concrete frame node method can effectively prevent the direct affixing of the CFRP easy peel off, which is difficult to be implemented in the actual engineering and other defects. Through the comparative analysis of the finite element analysis of the five anchoring CFRP joints in the hysteresis curve, the joint bearing capacity and the ductility coefficient, the paper discusses the stirrup ratio of the end beam, the amount of the longitudinal CFRP strip and the transverse CFRP strip Effect of Parameters of Hoop on Seismic Performance of Joints. The analysis results show that the anchorage CFRP with beam-column reinforcement can significantly improve the seismic performance of the joints, and the ultimate load carrying capacity and the displacement ductility coefficient at the beam ends increase by 19.8% and 55.5% respectively. When the other parameters are the same, The configuration rate of longitudinal CFRP strips can improve the seismic ductility and bearing capacity of the reinforced joints at the same time. The stirrup ratio at the beam end can significantly improve the seismic ductility. The ratio of the CFRP strip’s hoop configuration at the ends to the seismic ductility and load carrying capacity Improve the role of small, but can effectively delay the longitudinal reinforcement yield and bond slip.