Roughness Effects on the Fracture Energy between FRP and Concrete

2018 2nd International Conference on Advanced Technologies in Manufacturing and Materials Engineering

Yin, Yu-Shi^1,2 ; Fan, Ying-Fang^1

Department of Civil Engineering, Dalian Maritime University, Dalian

116026, China^1

Liaoning Provincial College of Communications, Shenyang

110122, China^2

关键词: Closed form solutions;    Concrete samples;    Concrete strength;    Concrete surface roughness;    Extreme points;    Interface roughness;    Research results;    Roughness effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/389/1/012016/pdf
DOI  :  10.1088/1757-899X/389/1/012016

来源: IOP

【 摘 要 】

The single test is carried out on totally 54 concrete samples with 6 different interface-roughness conditions, as to delve into the influence of concrete surface roughness on the concrete-FRP interface. Accordingly the closed-form solution based on the compressive strength and interface roughness parameters of concrete is acquired. As the research result indicates, the extremum and extreme point exist in terms of influence of concrete surface roughness on fracture energy, the model acquired in line with the test data is appropriately applicable under the condition 0.34≤ fi ≤0.56, and such model is overall applicable under the concrete strength of 30MPa≤ f c0 ≤50MPa. The model proposed hereof in this paper is superior to the existing models, as not only the significant contribution made by concrete strength to fracture energy is considered, but the influence of concrete surface roughness on interface is highlighted.