Determination of Mode Ⅱ Size-independent Fracture Energy of CFRP Sheet-to-Concrete Joints
The intention of this paper is to analyse the Mode Ⅱ(shear)fracture energy of CFRP sheet-to-concrete joints both analytically and experimentally.An analytical model is proposed to predict the load-carrying capacity of pull-push single-lap joints between CFRP sheets and concrete with an un-bonded length(simulated as an initial interfacial shear crack).Moreover,tests of pull-push single-lap joints between CFRP sheets and concrete with the overlapping length of 200 mm and different un-bonded lengths from 20 mm to 180 mm are carried out.Upon the comparison between the experimentally determined and analytically predicted load-carrying capacity of different joints,the crack-tip Mode II local fracture energy indeed varies with the initial shear crack lengths.A bi-linear model is then proposed for the Mode Ⅱ local fracture energy distribution along the overlapping length.The transition length affected by the back boundary effect is approximately five times of the maximum aggregate size of concrete.The maximum value,as well as the Mode Ⅱ size-independent fracture energy,is 550 N/m.
CFRP sheet concrete mode Ⅱ fracture bi-linear model size-independent fracture energy
Liu Yang Yang Shutong
College of Engineering,Civil Engineering,Ocean University of China/Qingdao,Shandong,China
国际会议
新加坡
英文
1-5
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）