基于ANSYS的某拱形刚架极限承载力研究

Research on the ultimate strength capacity of an arch steel frame using ANSYS

采用ANSYS Beam189单元,通过调用外部程序CRSTRESS直接施加残余应力,考虑初始几何缺陷,对某体育馆多次变曲率,变截面拱形刚架进行了极限承载力分析,得到了结构的荷载位移曲线,评估了结构的安全性能.为了验证该分析方法的精度,与Vogel山式框架做了分析对比,极限承载力和荷载位移曲线都比较符合,验证了该工程分析结果的可靠性,为同类工程提供分析借鉴.

Considering the effect of residual stress using external program CRSTRESS and initial geometric imperfect, the ultimate strength capacity of an arch steel frame with variable curvatures and variable sectional height have been studied using ANSYS. The load-displacement curves were achieved and the safety performance of the structure evaluated. In order to verify the applicability of the method, Vogel＇s gable frame was analyzed. The study on the ultimate strength capacity and the load-displacement curves of different methods shows that there is little difference and the proposed method is reliable.