粘贴不同层数CFRP加固梁受力性能有限元分析

On Finite Element Analysis of CFRP Strengthened Beams Pasted of Different Layers Performance

碳纤维增强聚合物(CFRP)加固技术日趋成熟,但加固钢筋混凝土梁所需CFRP的层数却常以经验确定,导致CFRP粘贴层数偏多,趋于保守,造成浪费.以实测材料参数为依据,通过ANSYS有限元模型,计算粘贴不同层数CFRP后梁的受力性能,找到最佳粘贴层数,为工程实践提供参考.计算结果表明,粘贴CFRP的梁承载力及变形性能大幅提高,通过分析,提出两点主要影响因素及其可能导致的结果,并推测了试验裂缝的分布模式及发展状态.

Carbon-fiber-reinforced polymer （CFRP） reinforcement technology maturing ,but the number of layers needed by CFRP strengthened reinforced concrete beams usually determined empirically ,conserva-tively ,resulting in unnecessary waste .In this paper ,ANSYS finite element models based on the measured material parameters calculate the mechanical properties of reinforced beams pasted different layers of CFRP ,and find the most suitable layers to provide reference for engineering practices .The results show that bearing capacity and deformation properties of CFRP pasted beams substantially increased .Two main factors and possible results been proposed through analysis ,and speculated the distribution patterns of cracks and development of the state test .