Analysis of interfacial bonding characteristics of CFRP-concrete under fatigue loading

被引：22
作者：
Zhu, Jun-Tao [1 ]
Wang, Xin-Ling [1 ]
Kang, Xian-Dong [2 ]
Li, Ke [1 ]
机构：
[1] Zhengzhou Univ, Sch Civil Engn, Sci Ave 100, Zhengzhou 450001, Peoples R China
[2] Beijing Earthquake Adm, Beijing, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 126卷
基金：
中国博士后科学基金;
关键词：
Fatigue test; CFRP; Bond-slip; Beam specimen; Reinforced concrete; RC BEAMS; SHEAR; GROWTH;
D O I：
10.1016/j.conbuildmat.2016.06.071
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The paper presents the results of an experimental and analytical study involving the bond properties of nine specimens externally strengthened with carbon-fiber-reinforced polymer (CFRP) sheets under fatigue loading. The purpose of this study is to investigate the influence of concrete strength and fatigue amplitude on the bond performance of CFRP-concrete interface under fatigue loading. Firstly, modified beam specimens with different concrete strengths were designed and constructed. Secondly, the specimens were tested under fatigue loads with different fatigue amplitudes. The test results show that the fatigue life increased with an increase in concrete strength, but decreased as the fatigue load amplitude increased, and a formula was proposed to predict the fatigue life. Moreover, the concrete strength and fatigue loading amplitude have little effect on the effective bond length under fatigue loading. The test results of bond-slip relationship show that the bond-slip curves continuously degraded with an increase in the number of load cycles, that is, the maximum shear stress decreased with an increase in the number of load cycles. Finally, a bond-slip model was developed considering the effects of concrete strength and fatigue loading amplitude. The comparison between experimental results and this model demonstrated that this developed bond-slip model can be used to describe the bond-slip relationship of the CFRP-concrete interface under fatigue loading. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：823 / 833
页数：11
相关论文
共 28 条
[1]   Design against cracking at openings in reinforced concrete beams strengthened with composite sheets [J].
Abdalla, HA ;
Torkey, AM ;
Haggag, HA ;
Abu-Amira, AF .
COMPOSITE STRUCTURES, 2003, 60 (02) :197-204
[2]   Shear strengthening of reinforced concrete beams using steel plates bonded on beam web: experiments and analysis [J].
Adhikary, BB ;
Mutsuyoshi, H ;
Sano, M .
CONSTRUCTION AND BUILDING MATERIALS, 2000, 14 (05) :237-244
[3]   Effect of damaged concrete cover on the behavior of corroded concrete beams repaired with CFRP sheets [J].
Al-Saidy, A. H. ;
Al-Jabri, K. S. .
COMPOSITE STRUCTURES, 2011, 93 (07) :1775-1786
[4]   Nonlinear micromechanics-based bond-slip model for FRP/concrete interfaces [J].
Baky, H. Abdel ;
Ebead, U. A. ;
Neale, K. W. .
ENGINEERING STRUCTURES, 2012, 39 :11-23
[5]   Experimental and theoretical issues in FRP-concrete bonding [J].
Biolzi, L. ;
Ghittoni, C. ;
Fedele, R. ;
Rosati, G. .
CONSTRUCTION AND BUILDING MATERIALS, 2013, 41 :182-190
[6]   Experimental investigations on the influence of size on the performance of RC T-beams retrofitted in shear with CFRP fabrics [J].
Bousselham, Abdelhak ;
Chaallal, Omar .
ENGINEERING STRUCTURES, 2013, 56 :1070-1079
[7]   Investigation of sub-critical fatigue crack growth in FRP/concrete cohesive interface using digital image analysis [J].
Carloni, Christian ;
Subramaniam, Kolluru V. .
COMPOSITES PART B-ENGINEERING, 2013, 51 :35-43
[8]  
Chajes M.J., 1994, CONSTR BUILD MATER, V8, P191
[9]   Flexural and shear strengthening of RC beams with composite materials - The influence of cutting steel stirrups to install CFRP strips [J].
Costa, Ines G. ;
Barros, Joaquim A. O. .
CEMENT & CONCRETE COMPOSITES, 2010, 32 (07) :544-553
[10]  
[邓江东 DENG Jiangdong], 2010, [复合材料学报, Acta Materiae Compositae Sinica], V27, P155
123