Effects of Roughness on Interfacial Bonding Properties Between Concrete and FRP

被引：1

作者：

Yin Y. ^{[1
]}

Fan Y. ^{[1
]}

Guo X. ^{[2
]}

机构：

[1] Department of Civil Engineering, Dalian Maritime University, Dalian, 116026, Liaoning

[2] School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510640, Guangdong

来源：

Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2019年 / 47卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Bond stress; Bridge engineering; Concrete; Fiber-reinforced polymer; Interface; Roughness;

D O I：

10.12141/j.issn.1000-565X.180422

中图分类号：

学科分类号：

摘要：

In order to reveal the influence of concrete roughness on the interfacial bonding properties between CFRP and concrete, the roughness of concrete was quantitatively assessed through the sand-pouring method, the single shear test of CFRP-concrete interfaces were completed under 6 different conditions of interfacial roughness, and the influences of concrete roughness on the ultimate bond force, bonding strength and bonding slipping curve of the CFRP-concrete interface were investigated, finding that, as compared with the specimen with a roughness of 0.25, the specimen with a roughness of 0.44 possesses the best interfacial bonding property, and its ultimate bond force and strength improve by 36%~51% and 124%~221%, respectively. Then, a model to calculate the effective bonding length of interface was established on the basis of the roughness parameters. From this model, it is found that(1)the effective bonding length of six surfaces generally decreases with the increase of roughness; (2)the bonding slipping curves of the samples remain consistent in rigidity in the brittle area, and the rougher the interface, the shorter the brittle section; and(3)in the plastic stage, the bonding slipping curves of the samples with 6 interface types slide with different slopes, eventually resulting in a stripping damage at a slipping value of 0.04~ 0.37mm. © 2019, Editorial Department, Journal of South China University of Technology. All right reserved.

引用

页码：130 / 138

页数：8

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