MOISTURE EFFECTS ON FRP-CONCRETE INTERFACE PROPERTY AND BOND MODEL
The literatures show quite different conclusions on the moisture effects on FRP-concrete interface property,such as debonding strength.In order to clarify the moisture effects the authors applied full-immersion exposure for 18 months to six different CFRP external bonding systems,which are internationally used,(3 from Japan,2 from Europe and 1 from US).The results show that none of six systems show significant reduction in bond strength,however some of them show some reduction,while some others,which are dry-layup(prefabricated)system,show increase in bond strength.There is no clear relationship between resin property degradation and bond strength degradation.The reason of bond strength increase was discussed,while the possible explanation was given for the different conclusions on the moisture effects among different literatures.Based on the experimental results,the bond stress-slip relationship,which considers the effects of moisture,was proposed.The model was based on FRP strain-slip relationship.The calculated fracture energy agrees well with experimental results,which is obtained from ultimate pullout force.
moisture effect interfacial bond strength bond stress-slip relationship interfacial surface roughness wet/dry-layup
Ueda Tamon Justin Shrestha Zhang Dawei
Faculty of Engineering,Hokkaido University,Sapporo,Japan Engineering Development Department,Takenaka Civil Engineering & Construction Co.Ltd,Tokyo,Japan College of Civil Engineering and Architecture,Zhejiang University,Hangzhou,China
国际会议
新加坡
英文
1-6
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）