摘要
为研究钢筋混凝土柱经碳纤维布加固后框架节点的抗震性能,对2个缩尺比例为1∶2的钢筋混凝土框架试件进行了拟静力试验,用碳纤维布对其中一个框架节点的柱进行加固处理,对试件的破坏形态、滞回曲线、延性、刚度退化及钢筋应力进行对比分析。研究结果表明:碳纤维加固试件比普通试件表现出更好的抗震性能,承载力、极限位移和延性系数较普通试件分别提高了22.9%、9.9%、5.4%;柱端经碳纤维布加固后的钢筋混凝土框架节点更容易实现“强柱弱梁”效果,为钢筋混凝土框架柱采用碳纤维布加固的应用提供了参考。
In order to study the seismic behavior of reinforced concrete column joints strengthened with carbon fiber sheet,two reinforced concrete frame specimens with a scale ratio of 1∶2 are tested by pseudo-static test.The column ends of one of the frame joints are strengthened with carbon fiber sheet,and the failure modes,hysteretic curves,ductility and stiffness of the specimens are analyzed respectively.Degradation and reinforcing bar stress are compared and analyzed.The results show that CFRP strengthened specimens have better seismic performance than ordinary specimens,and the bearing capacity,ultimate displacement and ductility coefficient are increased by 22.9%,9.9%and 5.4%respectively,compared with ordinary specimens;the reinforced concrete frame joints strengthened by CFRP sheets at the end of columns are easier to achieve the effect of“strong column and weak beam”,which is the coagulation of reinforcing bars.The application of CFRP in strengthening soil frame columns can provide reference.
作者
任宏伟
王思远
严珊
Ren Hong-wei;Wang Si-yuan;Yan Shan(College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan 063210,China)
出处
《工程抗震与加固改造》
北大核心
2020年第4期55-62,共8页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51678236)
河北省高等学校科学技术研究青年基金项目(QN2018160)。
关键词
碳纤维布加固
框架节点
强柱弱梁
抗震性能
CFRP strengthening
frame joints
strong columns and weak beams
seismic performance
