摘要
钢筋锈蚀以致局部箍筋锈断将会降低混凝土柱的抗震性能,采取碳纤维增强材料(CFRP)加固方法可对此类锈蚀钢筋混凝土柱的抗震性能进行修补。基于28根T形柱的试验研究,初步揭示了钢筋锈蚀率、轴压比、CFRP加固方式和加固层数对混凝土柱抗震性能影响规律。钢筋锈蚀会导致混凝土柱的耗能能力、刚度、承载力和延性不同程度的降低。当钢筋锈蚀率达到15%时,混凝土柱的延性系数下降约40%。经过CFRP加固后,锈蚀柱的滞回环变得较为饱满,耗能能力大大增强,其延性系数可提高约40%,耗能能力可提高约80%。
Due to corrosion or disruption of stirrups in some parts of the coloumn, could seismic behaviors of corroded reinforced concrete columnswould cut down, and could be recovered by strengthening with wrapped CFRP sheets. Based on experimental study of 28 T-shaped concrete columns, the laws were revealed that seismic behaviors of concrete columns were affected by rate of reinforcement corrosion, axial compression ratio, strengthening style and layers of wrapped CFRP sheets. Reinforcement corrosion could reduce columns＇ behaviors of energy dissipation, rigidity, capacity and ductility to some degree. The ductility coefficient could be decreased by 40% when the rate of reinforcement corrosion was up to 15%. Strengthened with wrapped CFRP sheets, corroded reinforced concrete columns raised largely their behaviors of energy dissipation, with more full hysteresis loop, and their ductility coefficient could be improved 40% , behaviors of energy dissipation could be raised by 80%.
出处
《工业建筑》
CSCD
北大核心
2013年第10期153-159,165,共8页
Industrial Construction
基金
江苏省333高层次人才培养工程基金资助项目(2012)
江苏省高校"青蓝工程"中青年学术带头人培养基金资助项目(2012)
泰州市混凝土结构加固与修复工程研发中心建设基金资助项目
关键词
CFRP加固
箍筋锈断
混凝土柱
抗震性能
试验
strengthened with wrapped CFRP sheets
corroded-or-broken stirrup
reinforced concrete column
seismic behavior
test
