混凝土强度对CFRP板加固钢混梁抗剪性能的影响

摘要

为提高钢筋混凝土梁的力学性能,利用ABAQUS有限元软件建立碳纤维增强复合材料(CFRP)加固钢筋混凝土梁的有限元模型,通过钢筋混凝土梁的受力和荷载分析验证模型的有效性.设计不同混凝土强度的模型构件,模拟分析CFRP板加固钢筋混凝土梁的抗剪性能.结果表明,随着混凝土强度等级的提高,CFRP板加固后钢筋混凝土梁的跨中位移呈减小趋势,而抗剪承载力和刚度呈递增趋势.该研究为钢筋混凝土梁加固提供了参考.%This paper presents an effort to improve the mechanical properties of reinforced concrete beams. The study involves developing the finite element model of reinforced concrete beams strengthened with carbon fiber reinforced composite ( CFRP) using ABAQUS finite element software;verifying the ef-fectiveness of the model by the force and load analysis of reinforced concrete beams; and simulating the shear strength of reinforced concrete beams strengthened with CFRP plates using the model members with different concrete strength. The results demonstrate that along with an increase in concrete strength grade comes a decreasing trend in the cross-displacement of reinforced concrete beams after the increase of CFRP plate, and an increasing trend in the shear capacity and stiffness. This research may provide a ref-erence for reinforcement of reinforced concrete beams.