湿技术条件下GFRP板-混凝土界面黏结性能试验研究  

Experimental study on bonding behavior of GFRP plate and concrete interface based on wet bonding technique

作　　者：王文炜[1] 黄辉[1] 赵飞[2] 

机构地区：[1]东南大学,江苏南京210018 [2]江苏省交通规划设计院股份有限公司,江苏南京210014

出　　处：《土木工程学报》2015年第3期52-60,共9页China Civil Engineering Journal

基　　金：国家自然科学基金(51078079)

摘　　要：进行湿技术条件下GFRP板与混凝土界面黏结性能试验。在试验研究的基础上,建立预测界面黏结强度和黏结剪应力-滑移本构关系模型并与试验结果进行比较分析。试验结果表明,湿技术条件下试件的破坏层位于砂浆层,GFRP板上黏结有细骨料颗粒;混凝土浇筑时机、混凝土龄期及界面形式对界面剥离荷载影响显著。混凝土浇筑时机为30min时,界面剥离荷载达到最大值;剥离荷载随着混凝土龄期的增加而增大。计算结果表明,建立的预测模型与试验值吻合较好,可以有效地预测湿技术条件下界面的黏结强度和黏结剪应力-滑移关系曲线。The experiments on bonding behavior at the interface of GFRP plate and cast-in-place concrete were conducted. A predicted model for the interfacial debonding loads and relationship of interfacial shear stress and slip was proposed. The test results show that the failures of specimens based on the wet bonding technique appear in the mortar layer and the fine aggregates were found to be bonded on the debonding GFRP plate. The initial placement time of concrete,curing time of concrete and interfacial type influence the debonding loads significantly. The maximum debonding load is obtained when the initial placement of concrete is 30 minute. The debonding loads increase with the curing time of concrete. The calculated results by the proposed model agree well with the experimental results,which show that the debonding loads and relationship between local interfacial shear stress and slip can be effectively predicted.

关 键 词：GFRP板 现浇混凝土 界面 湿技术 剥离荷载 

分 类 号：TU398.9[建筑科学—结构工程]