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通过1个火灾后碳纤维加固型钢混凝土梁柱节点试件和1个碳纤维加固常温下未受火型钢混凝土梁柱节点试件的低周反复加载试验及2个常温下及火灾后未加固节点的对比试验,研究碳纤维加固对常温下及火灾后型钢混凝土梁柱节点抗震性能修复的有效性。结果表明:火灾后型钢混凝土梁柱节点的承载力和刚度降低、延性系数减小。所采用的碳纤维加固方法能有效提高常温下及火灾后型钢混凝土梁柱节点的承载力与延性,加固后试件的滞回曲线更加饱满,变形能力增强,极限荷载后的强度和刚度退化减缓,抗震性能的修复效果显著。
Passing a low temperature cyclic loading test and a comparison of two unbonded joints at room temperature and after fire using a specimen of carbon steel reinforced concrete beam-column joints and a carbon fiber reinforced unbonded beam-column joint at room temperature after fire Experiments were conducted to study the effectiveness of carbon fiber reinforcement for the seismic performance restoration of beam-column joints at normal temperature and after fire. The results show that the bearing capacity and stiffness of beam - column joints decrease after fire and the ductility coefficient decreases. The method of carbon fiber reinforcement can effectively improve the bearing capacity and ductility of the beam-column joints at normal temperature and after fire, and the hysteresis curve of the specimens is more full after deformation, the deformation capacity is enhanced, the strength and stiffness degradation after the ultimate load is slowed down, Seismic performance of the repair effect is significant.