Flexural Performance of Reinforced Concrete Beams Strengthened with Carbon Fiber-Reinforced Polymer (CFRP) under Hygrothermal Environment Considering the Influence of CFRP–Concrete Interface
作者： Xinyan Guo , Peiyan Huang , Yilin Wang , Shenyunhao Shu , Xiaohong Zheng
DOI: 10.1007/S10338-020-00207-7
关键词: Stress distribution 、 Deflection (engineering) 、 Interfacial shear 、 Flexural strength 、 Beam (structure) 、 Composite material 、 Ultimate load 、 Reinforced concrete 、 Carbon fiber reinforced polymer 、 Materials science
摘要: As an important component, the bond behavior of carbon fiber-reinforced polymer (CFRP)–concrete interface for a reinforced concrete (RC) beam is very significant. In this study, theoretical model was established to analyze flexural CFRP-strengthened RC beams, and CFRP–concrete interfacial bond–slip relationship under hygrothermal environment unified into one model. Two failure criteria corresponding two types modes, i.e., crushing intermediate crack (IC)-induced debonding, were developed. Through model, deflection, shear stress distribution ultimate load obtained predicted. Moreover, verified by test results. The results showed that had significant impact on behavior. Compared with control without pretreatment, deflection strengthened decreased 51.9% 20%, respectively.
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