材料科学
复合材料
碳纤维增强聚合物
极限抗拉强度
梁(结构)
胶粘剂
环氧树脂
钢筋
粘结强度
钢筋混凝土
结构工程
图层(电子)
工程类
作者
Piya Chotickai,Supakorn Somana
出处
期刊:Journal of Composites for Construction
[American Society of Civil Engineers]
日期:2018-09-18
卷期号:22 (6)
被引量:14
标识
DOI:10.1061/(asce)cc.1943-5614.0000895
摘要
This paper reports on the effect of exposure to cycles of wetting and drying in fresh and salt water on the performance of carbon fiber-reinforced polymer (CFRP)-bonded concrete beams. The test program included 3, 8, and 12 months of exposure of normal and high-strength concrete specimens strengthened with one and two layers of CFRP reinforcement. The results indicated that the exposure caused a reduction in the tensile strength and modulus of elasticity of the epoxy adhesive. The ultimate loads of the small-beam specimens were not significantly affected by the exposure owing to the redistribution of shear stress along the CFRP plates. The degradation of the CFRP-concrete interface, however, decreased the bond strength and fracture energy of CFRP strengthening systems in the small-beam test, especially in the one-layer high-strength concrete configuration. Insights on bond characteristics and failure mechanisms of CFRP-strengthened concrete under the tested exposure conditions are presented.
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