(1 孝感学院，孝感 432100； 2 武汉大学，武汉 430072)

［摘要］采用碳纤维布加固框架节点梁端的加固方式，研究了6个加固节点在低周反复荷载作用下的抗震性能。低周反复荷载作用下，着重考虑了混凝土强度和锚固方式对加固效果的影响。加固后试件的开裂荷载、屈服荷载和破坏荷载均有所提高，梁上的封闭碳纤维布箍对混凝土起到良好的约束作用，在一定程度上提高了试件的承载力，延缓了裂缝的产生和发展。试验从滞回曲线、刚度退化、能量耗散、延性、主筋应变及节点核心区剪切变形等方面进行了研究。加固后节点的滞回环趋于饱满，刚度退化减小，耗能能力和延性系数均有不同程度的提高，梁柱中主筋应变由于碳纤维布的作用而得到控制。

［关键词］加固；框架节点；试验；抗震性能

Experimental study on the beam-column joint strengthened with CFRP under low-cycle reversed load

Liu Jinjun¹, Wang Tianwen²(1 Xiaogan University, Xiaogan 432100, China; 2 Wuhan University, Wuhan 430072, China)

Abstract:The experiment of 6 beam-column joints strengthened with CFRP under low-cycle reversed load is performed. Two influencing factors: concrete intensity and anchor methods under low-cycle reversed load are considered. The cracking load, bending load and destructive load are improved. The close CFRP hoop on the beam can restrict concrete, so as to enhance its bearing capacity and relay the occurrence and development of the cracks. The hysteresis loop, stiffness digration, energy dissipation, ductility, reinforcement strain and shearing deformation of core of beam-column joints are studied. The aseismic behavior of reinforced members have been improved. Because of CFRP, reinforcement strain can be controlled.

Keywords:reinforcement; beam-column joint; experiment; aseismic behaviour

作者简介：刘进军，硕士，讲师，Email：hbxgljj@126.com。

参考文献

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［2］赵彤，谢剑.碳纤维布补强加固混凝土结构新技术［M］.天津：天津大学出版社，2001.

［3］叶列平. 碳纤维布在混凝土梁受弯加固中抗剥离性能的试验研究［J］.建筑结构，2003，33(2)：61-65.