CFRP加固混凝土界面粘结-滑移数学模型解析研究  

Analytical study on mathematical model of interfacial bonding-slip of CFRP reinforced concrete

作　　者：程双青 CHENG Shuangqing(Shaanxi Artistic Vocational College,Xi’an 710054,China)

机构地区：[1]陕西艺术职业学院,陕西西安710054

出　　处：《粘接》2024年第10期28-30,34,共4页Adhesion

摘　　要：采用CFRP(碳纤维增强复合材料)加固混凝土是一种新型的加固方式,界面的粘结-滑移关系更是研究高温环境下加固混凝土结构性能与破坏行为的重要基石。对此,本文简述了高温环境下混凝土损伤分析模型与常用的加固方法,设计与制备CFRP-混凝土试件,进行高低温循环作用下双面剪切试验,分析了混凝土强度等级、高低温循环次数对界面破坏形态和极限承载力的影响,基于双线性模型,通过对试验数据拟合,建立了高低温循环作用下界面的粘结-滑移数学模型,提出了CFRP-混凝土界面最大剪应力、最大滑移量、初始刚度等参数的表达式。Using CFRP to strengthen concrete is a new strengthening method.The bond-slip relationship at the interface is an important cornerstone for studying the structural performance and failure behavior of reinforced con⁃crete under high temperature environment.In this paper,the concrete damage analysis model and common rein⁃forcement methods under high temperature environment was briefly described,CFRP-concrete specimen was de⁃signed and prepared,double-sided shear test was carried out under the action of high and low temperature cycle,the effects of concrete strength grade and high and low temperature cycles on the interface failure mode and ultimate bearing capacity were analyzed,based on bilinear model,Based on the bilinear model,a mathematical model of bonding-slip at the interface under high and low temperature cycling was established by fitting the experimental data,and the expressions of parameters such as maximum shear stress,maximum slip and initial stiffness of the interface were proposed.

关 键 词：高温环境 CFRP-混凝土界面 破坏行为 粘结—滑移 数学模型 

分 类 号：TQ342.742[化学工程—化纤工业]