EXPERIMENT ON SEISMIC BEHAVIOR OF CFRP - STRENGTHENED EXTERIOR RC FRAME JOINTS
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摘要: 以碳纤维布对被加固构件混凝土的良好约束性能为纽带,结合多种加固补强材料,提出3种基于碳纤维布的抗震加固混凝土框架节点方法;并通过6个混凝土框架外节点试件的低周反复加载试验,从破坏模式、滞回特性、核心区剪切变形、强度与刚度退化以及耗能能力等方面,分析研究不同加固方法对节点抗震性能的改善效果。Abstract: Several strengthening materials could be added to CFRP -strengthening system because of the excellentcharacteristics of CFRP sheets and three strengthening schemes of beam -column joints based on CFRP sheets are put forwardto upgrade the seismic behavior of those under designed RC frames. Based on the quas- i static test of six exterior RC beam-column joints, the effectiveness of the schemes was examined in aspect of failure modes, hysteretic response, sheardeformation of joint cores, strength degradation, stiffness degradation and energy dissipation capacity.
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Key words:
- CFRP sheets /
- reinforced concrete /
- strengthening /
- beam -column joints
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马永欣,郑山锁. 结构试验[M].北京:科学出版社,2001. JGJ 101-1996.建筑抗震试验方法规程[S]. GB 50152-1992.混凝土结构试验方法标准[S].
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