基于ANSYS的预应力CFRP布加固混凝土梁有限元分析

Finite Element Analysis of Concrete Beams Strengthened with Prestressed CFRP Sheets Based on ANSYS

采用ANSYS有限元分析软件,对卸载或不卸载时预应力碳纤维(CFRP)布加固梁进行仿真分析,并在有限元分析中提出了施加预应力的方法(升温法),以及利用单元的生与死实现不卸载时加固的方法.通过实例对比分析表明,基于ANSYS的有限元分析结果与试验分析结果吻合较好,可在一定程度上有效替代试验分析方法,从而减少试验所需的时间和费用,对后续的CFRP布加固混凝土结构的研究工作具有一定的参考价值.

Finite element simulative analysis by ANSYS software are done for the concrete beams strengthened with prestressed CFRP sheets when they are uninstalled or when they are not uninstalled. In the finite element analysis, the methods of bringing prestress to bear on CFRP sheets (the method of the rise in temperature) and that strengthening when it is not uninstalled by birth and death of elements have been put forward. It's shown that the result of the finite element analysis by ANSYS has a close agreement with the experimental result. So, finite element analysis method is feasible and available in practical application, which can greatly reduce labour cost and other costs compared with the experimental analysis method.