碳纤维加固混凝土梁抗弯性能的非线性有限元分析

Finite Element Nonlinear Analysis for the Flexural Strengthening of Carbon Fiber Reinforced Concrete Beams

对经碳纤维加固后的钢筋混凝土梁进行有限元非线性全过程数值模拟分析。成功地解决了有限元求解碳纤维加固混凝土梁非线性数值的收敛问题,阐述了非线性的行为。有限元计算的结果与试验结果具有较好的一致性,并对两者之间的误差所产生的原因进行了分析。结果表明,建立合理的有限元数值模型,并采用合理的求解策略,能很好的准确预测并模拟碳纤维布加固混凝土梁的抗弯性能,同时也为以后的数值研究工作奠定了基础。

In this paper,the complete nonlinear numerical analysis of the carbon fiber reinforced concrete beams is made using the finite element method.A series of reasonable methods are adopted to solve the difficult problem in nonlinear numerical calculation of the beam.The nonlinear behavior of the beam is elaborated.The numerical results are quite consistent with the test results,and the reasons for error are analysed . The numerical results show that the flexural strengthening of carbon fiber reinforced concrete beams can be forecasted and simulated accurately on the basis of reasonable finite element numerical model and reasonable solution strategy.At the same time,the numerical research work may be a reference for further research.