摘要
基于虚拟裂缝模型和试验测得的荷载与裂缝口张开位移曲线,计算得到碳纤维(CFRP)加固含裂缝混凝土梁的裂缝扩展阻力曲线,并讨论试件尺寸对CFRP加固试件阻力性能的影响.结果表明,CFRP加固试件中也存在断裂过程区长度减小的现象,纤维布的阻裂作用是影响CFRP加固试件裂缝扩展阻力性能的关键因素,并且试件高度和初始裂缝长度对CFRP加固试件的阻裂性能无明显影响.
Based on the fictitious crack model and the load versus crack mouth opening displacement curves recorded in the experiment, the crack extension resistance curves （KR-curves） of the CFRP-reinforced cracked concrete beams are calculated. Then, the effects of specimen sizes on the crack extension resistance performances of the CFRP-reinforced cracked concrete beams are discussed. The results indicate that, the fracture process zone length would also decease in the CFRP-reinforced concrete beam; and the arresting contribution from CFRP to concrete crack is the key factor affected the crack extension resistance performances of the CFRP-reinforced specimen; what is more, specimen depth and initial crack length have little effect on the crack extension resistance performance of the CFRP-reinforced specimen.
出处
《三峡大学学报（自然科学版）》
CAS
2009年第4期65-68,共4页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然基金项目(50878036)
关键词
混凝土
CFRP布
断裂阻力
虚拟裂缝模型
concrete
CFRP sheet
crack extension resistance
fictitious crack model
