Bond behavior and failure mechanism of fiber-reinforced polymer bar-engineered cementitious composite interface

被引：37
作者：
Zhao, Debo [1 ,2 ]
Zhou, Yingwu [1 ,2 ]
Xing, Feng [1 ,2 ]
Sui, Lili [1 ]
Ye, Zenghui [1 ]
Fu, Huankai [1 ]
机构：
[1] Shenzhen Univ, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen 518060, Peoples R China
[2] Shenzhen Univ, Minist Educ, Key Lab Resilient Infrastruct Coastal Cities, Shenzhen 518060, Peoples R China
来源：
ENGINEERING STRUCTURES | 2021年 / 243卷
基金：
中国国家自然科学基金;
关键词：
Engineered cementitious composites (ECC); FRP bar; Bond behavior; CONCRETE BEAMS; GFRP BARS; CORROSION-RESISTANCE; DEVELOPMENT LENGTH; FLEXURAL BEHAVIOR; STEEL; PERFORMANCE; STRENGTH; ELEMENTS; MEMBERS;
D O I：
10.1016/j.engstruct.2021.112520
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The bond performance of engineered cementitious composites (ECCs) and fiber-reinforced polymer (FRP) bars was investigated via pullout tests. The experimental results indicated that increasing the ECC strength led to a proportional increase in the bond strength, and rebars with higher ribs exhibited higher bond strengths (by a maximum of 55%) than counterparts with lower ribs. A finite-element model of an ECC thick-walled cylinder was developed to examine the interfacial bond failure mechanism and was validated by experimental data. Experimental and simulation results indicated that owing to the excellent post-crack resistance of the ECC material, splitting failure at the rebar-ECC interface was prevented, and the shear resistance of ECC corbels between the rebar ribs significantly affected the bond failure. A simplified bond-strength model was then developed according to the pullout failure mode, and a new equation for the bond strength that accounts for the surface configuration of the rebar was derived.
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页数：16
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