Bonding behavior between glass fiber reinforced polymer composite bars and engineered cementitious composite

被引：0
|
作者：
Wu L. [1 ]
Wang Y. [1 ]
Xie L. [1 ]
Hu C. [1 ]
Sheng D. [1 ]
机构：
[1] State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology Beijing, Beijing
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2020年 / 37卷 / 03期
关键词：
Bond-slip; Bonding strength; Composite bars; Engineered cementitious composite; Glass fiber reinforced polymer; Pull-out test;
D O I：
10.13801/j.cnki.fhclxb.20190729.001
中图分类号：
学科分类号：
摘要：
In order to study the influence factors of bonding properties of glass fiber reinforced polymer (GFRP) composite bars and engineered cementitious composites (ECC), pull-out tests on forty-two GFRP/ECC testing specimens were designed and carried out. The influences of the surface form of GFRP composite bar, the diameter of GFRP composite bar, the strength of ECC matrix, and the thickness of the concrete cover on the bonding properties of the interface between GFRP composite bars and ECC were analyzed. The results show that there are mainly three failure modes, namely pull-out failure, peeling off of resin, and splitting failure. The bonding strength at the interface of GFRP composite bars with ribbed surface form is about 66% higher than those plain round GFRP composite bars. When the thickness of ECC concrete cover increases from 1.5D to 4D, the bonding strength of GFRP/ECC increases by about 58% (D is diameter of GFRP composite bars). When the diameter of CFRP composite varies between 12~18 mm, the bonding strength of GFRP/ECC decreases with the increase of CFRP composite bar diameter. When the strength of ECC increases from 33.7 MPa to 73.3 MPa, the bonding strength of GFRP/ECC increases about 3 times. Increasing the complexity of the surface form of GFRP composite bars, or to some extent increasing the thickness of ECC matrix protective layer and the strength of ECC can help to improve the bonding strength between GFRP composite bars and ECC. © 2020, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：696 / 706
页数：10
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