董伟

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:土木工程系

学科:结构工程

办公地点:建设工程学部4号楼328室

联系方式:0411-84707414

电子邮箱:dongwei@dlut.edu.cn

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STUDY ON K-R-CURVES OF THE CONCRETE BEAM REINFORCED WITH CFRP

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论文类型:会议论文

发表时间:2010-01-01

收录刊物:CPCI-S

页面范围:25-29

关键字:CFRP composites; K-R-curves; cracked concrete beam; fracture characteristics

摘要:A new method based on the fictitious crack model to calculate K-R-curves of the concrete beam reinforced with CFRP is proposed in this paper. In this method, the resistance varied with crack propagation can be divided into three parts: the crack initial toughness that is the inherent toughness of the concrete material, the contribution from the cohesive force along the fictitious crack zone during the complete processes of fracture, and the crack resistance providing by CFRP. Considering the contribution of CFRP as a closing force, the analytic solution of the K-R-curves of the reinforced concrete was computed according to the P-CMOD curves measured from tests. Afterwards, the method was used to calculate the K-R-curves of the concrete beams reinforced with CFRP with heights of 200mm and the initial relative crack lengths of 0.2. 0.3. 0.4 respectively. The results indicated that the fracture process zone length also increased from zero to the maximum, and then decreases, which showed the same behaviors as that of the plain concrete.