New Strengthening Techniques with FRP Laminates and Interfacial Fracture Theories
来源期刊：材料科学与工程学报2000年增刊第2期
论文作者：Hong Yuan Zhishen Wu
关键词：energy release rate; interfacial fracture energy; FRP; elastic laminate; structure strengthening; fracture theory;
摘 要：The use of FRP composites in the form of sheet or plate bonded to the large-scale RC structures is becoming an increasing attractive solution to the strengthening of existing structures. Compared with traditional steel plate strengthening, FRP possesses excellent behavior such as lightness in weight, high strength-to-weight and stiffness-to-weight ratio, high corrosion and fatigue resistance, electronic neutrality, and great efficiency in construction. A important failure mode for FRP-strengthened structures is debondings.Therefore, the LEFM and NLFM are utilized to treat this problem. Closed form expressions for energy release rate, load-carrying capacity, load-displacement relation and interfacial crack propagation are obtained, in which a local shear stress-slip law with softening is adopted.
Hong Yuan1，Zhishen Wu2
(1.Ph. D., Department of Urban and Civil Engineering, Ibaraki University (Nakanarusawa 4-12-1, Hitachi 316-8511, Japan;
2.Dr. Eng., Department of Urban and Civil Engineering, Ibaraki University (Nakanarusawa 4-12-1, Hitachi 316-8511, Japan)
摘要:The use of FRP composites in the form of sheet or plate bonded to the large-scale RC structures is becoming an increasing attractive solution to the strengthening of existing structures. Compared with traditional steel plate strengthening, FRP possesses excellent behavior such as lightness in weight, high strength-to-weight and stiffness-to-weight ratio, high corrosion and fatigue resistance, electronic neutrality, and great efficiency in construction. A important failure mode for FRP-strengthened structures is debondings.Therefore, the LEFM and NLFM are utilized to treat this problem. Closed form expressions for energy release rate, load-carrying capacity, load-displacement relation and interfacial crack propagation are obtained, in which a local shear stress-slip law with softening is adopted.
关键词:energy release rate; interfacial fracture energy; FRP; elastic laminate; structure strengthening; fracture theory;
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