纤维增强塑料筋与珊瑚混凝土粘结滑移本构模型  

Constitutive model of bond-slip relation between FRP bar and coral concrete

作　　者：陈爽 吕海波[2,3] 王磊[2] CHEN Shuang;LYU Hai-bo;WANG Lei(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004,China;Hezhou University,Hezhou 542800,China)

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004 [3]贺州学院,广西贺州542800

出　　处：《桂林理工大学学报》2019年第1期107-113,共7页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51568013);广西自然科学基金项目(2016GXNSFBA380175);广西中青年教师基础能力提升项目(KY2016YB191)

摘　　要：鉴于FRP筋与钢筋之间、珊瑚混凝土与普通混凝土之间的物理力学特性差别,现有的钢筋-混凝土粘结滑移理论无法准确描述FRP筋-珊瑚混凝土间的粘结滑移行为。在已有研究成果和试验的基础上,建立了适用于FRP筋与珊瑚混凝土粘结滑移本构模型,并求解基于该模型上升段的粘结-滑移微分方程解答,利用该模型推导出FRP筋在珊瑚混凝土构件中的最小锚固长度的理论公式,并引入珊瑚混凝土修正系数。结果表明:该模型测算结果与试验数据吻合良好,研究成果为FRP筋与珊瑚混凝土的粘结理论研究提供了有益的参考。The bonding property between FRP bars and coral concrete is the basis for their cooperative work. However, there are plenty of relative experimental studies,but less theoretical researches. In view of the difference of physical and mechanical properties between FRP bars and steel bars, and between coral concrete and ordinary concrete, the existing bond-slip theory of reinforced concrete cannot accurately describe the bond-slip behavior between FRP bars and coral concrete. On the basis of experimental data and existing research, this study established a bond-slip constitutive model for FRP bars and coral concrete. Then we solved the bond-slip differential equation solution based on the model. Finally, the theoretical formula of the minimum embedment length of FRP bars in coral concrete is derived from the model. The results show that this constitutive model is in good agreement with the experimental data, and the calculated value of embedment length is close to the standard. The research results provide a useful theoretical basis for the study of bond between FRP bars and coral concrete.

关 键 词：FRP筋 珊瑚混凝土 粘结滑移 本构模型 

分 类 号：TU528[建筑科学—建筑技术科学]