摘要
研制了一种基于碳纤维传感特性的自监测智能TRC板,进行智能TRC板抗弯性能试验,检验智能TRC板的应变传感性能;进行智能TRC板加固RC梁抗弯性能试验,研究智能TRC板加固RC梁抗弯力电性能。研究结果表明,通过TRC电阻变化率和应变的关系,可以实现对TRC结构裂缝的监测;智能TRC板电阻灵敏系数为20,比常用电阻应变片灵敏系数大;加固梁荷载-位移曲线与荷载-电阻曲线基本吻合,智能TRC能够有效地监测试件受力损伤演化过程;智能TRC板加固RC结构,不仅能为结构提供有效承载力和延性,还能为结构在服役阶段的安全性提供有效的监测技术,实现集高效结构和实时结构健康监测于一体之目的。
A kind of self-monitoring intelligent TRC sheet based on carbon fiber sensing characteristics is studied. Strain sensing and repeatability of intelligent TRC sheet are tested under cyclic loading. The electromechanical performance of RC beams strengthened with intelligent TRC sheet is also analyzed by flexural tests. The cracks of TRC can be monitored based on the relationship between the change in electrical resistance and strain. Resistance sensitivity coefficient of intelligent TRC sheet is 20, which is bigger than strain gauge. Load displacement curve basically agrees well with load resistance curve of reinforcement beam. The component damage evolution process can be effectively monitored by intelligent TRC. Intelligent TRC can not only be used to increase bearing capacity and ductility for structure, but also provide effective monitoring technique for the safety of the structure in service stage.
出处
《土木工程学报》
EI
CSCD
北大核心
2015年第S1期67-73,共7页
China Civil Engineering Journal
基金
江苏省高校自然科学研究项目(14KJB560017)
住房和城乡建设部研究开发项目(2011-K1-64)
国家自然科学基金项目(50378018)
关键词
智能TRC
碳纤维
混凝土梁
力电性能
传感特性
intelligent TRC
carbon fiber
RC beam
electromechanical performance
sensing characteristic
