Research on Interfacial Bond-Slip Constitutive Relation Between FRP and Concrete Based on Two Parameters

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Yin, Yushi^1,2 ; Fan, Yingfang^1

Department of Civil Engineering, Dalian Maritime University, Dalian, LIAONING

116000, China^1

Liaoning Provincial College of Communications, Shenyang, LIAONING

110122, China^2

关键词: Closed form solutions;    Constitutive relations;    Construction design;    FRP-concrete interface;    Interface roughness;    Interfacial bond strength;    Interfacial roughness;    Theoretical values;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/2/022005/pdf
DOI  :  10.1088/1755-1315/108/2/022005

来源: IOP

【 摘 要 】

The paper is to quantify and assess the roughness of 108 concrete samples with 6 kinds of interface roughness to investigate the influence of surface roughness on the bond property of FRP-concrete interface. And in order to solve the problem of so many parameters in interfacial stress-slip constitutive relation between FRP and concrete that hard to practise for engineers, so adopting shear test to establish two parameters (fc0, fi) constitutive relation which are more suitable for engineers' construction design. Results shows that the compressive strength (fc0) and interfacial roughness (fi) are the two keys who influence the interfacial bond strength; The closed-form solution of τmand sfcan be solved by the two factors fc0, fi, this method supplies a new algorithm for the interface calculation, due to the theoretical value is less than the measured values, so there is a certain safety stock to construction.