【作者】 俞裕果； 黄炎生；

【Author】 Yu Yuguo~1,Huang Yansheng~(1,2) (1 School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China 2 State Key Laboratory of Subtropical Building Science)

【机构】 华南理工大学土木与交通学院； 亚热带建筑科学国家重点实验室；

【摘要】 分析FRP-混凝土界面的粘结性能,是研究FRP外贴加固钢筋混凝土结构的基础问题。本文根据已有的面内剪切试验研究结果,采用大型通用有限元程序MSC.Marc建立有限元模型并导入裂面剪力模型子程序,进行了非线性计算分析。引入了"裂缝带模型"、"界面粘结承载力"、"有效锚固长度"等概念,对混凝土单元开裂软化模量以及裂面剪力模型进行了优选。得到了FRP应变分布规律和界面粘结应力分布规律,提出了全新的"粘结屈服平台"概念,建议相关的界面性能非线性有限元分析采用本文的方法。更多还原

【Abstract】 For RC structures strengthened with FRP,debonding failure may occur before the FRP rupture strength is reached,and the strengthening effect is accordingly declined.It’s believed that the research of RC structures strengthened with FRP is found on the analysis of bond behavior of the interface between FRP and concrete.Based on the experimental research of Tan Zhuang,the finite element method is used to analyze the bond behavior in the interface by using MSC.Marc program.The concept of "crack band model","interface bonding capacity" and the "effective anchorage length" are introduced,the optimization of concrete element softening modulus and the shear model over crack is carried out.The FRP strain and the anchorage bonding stresses along the extensional bond length are obtained,and the distribution law is investigated,a brand new concept of "bonding yield deck" is proposed,the method is recommanded for relative nonlinear FEM analysis of bonding behavior.更多还原