碳纤维布加固高强混凝土梁的有限元分析

目的研究有限元分析法在碳纤维布加固高强混凝土梁中的应用，通过与试验结果比较来验证有限元分析的可行性．方法采用ANSYS有限元分析软件，对碳纤维布加固高强混凝土梁的受力性能进行数值模拟，探讨了单元的选取、本构关系的设定、网格的划分以及模型的建立等，通过后处理得到荷载一位移曲线、荷载一应变曲线以及裂缝的开展情况．结果通过与试验结果的对比得知，二者的荷载一位移曲线、荷载一应变曲线趋势一致，极限荷载的误差也在允许范围内，裂缝开展情况与真实情况相符．结论建立的有限元模型可以较好地模拟碳纤维布加固高强混凝土梁的受力性能，有限元分析可以作为一个有效的手段来分析高强混凝土粱的抗弯加固性能．

The Finite Element Analysis of Carbon Fiber Cloth Reinforced High Strength Concrete Beams

The purpose of this paper is to study the finite element method in application of CFRP reinforced high strength concrete beams, and to verify the feasibility of finite element analysis through comparison with experimental results. The method is to simulate the mechanical behavior of CFRP reinforced high strength concrete beams by using ANSYS finite element analysis software. The paper discusses the selection of the el- ement, the choice of the constitutive relations, the division of grid and the establishment of the model, etc. Load-displacement curves,load-strain curves and the development of the cracks are obtained by post-pro- cessing. The results show that the trend of load-displacement curves and load-strain curves are consistent, the error of the ultimate load is also within permission and the cracking situation is consistent with the real situa- tion. The finite element model can effectively simulate the mechanical properties of carbon fiber cloth rein- forced high strength concrete beams and finite element analysis can be used as an effective means to analyze the flexural reinforcement properties of high strength concrete beams.