摘要
使用大型有限元程序ANSYS,研究了某高速公路大跨径连续刚构桥的高墩非线性稳定性,其中非线性稳定分析包括几何非线性和双重非线性。计算结果表明,材料非线性对稳定性的影响较大;考虑双重非线性,稳定系数较线弹性解小得多。高墩连续刚构桥的悬臂施工阶段稳定系数最低,应采取措施防止施工中挂篮跌落。
The nonlinear stability of a long-span continuous rigid frame bridge with thin-wall bridge＇s high-piers was analyzed by using the current FEM software ANSYS. Two aspects are included in the nonlinear stability analysis. The first one, only geometric nonlinearity was considered and the other one, geometric nonlinearity and material nonlinearity were considered simultaneously. The results show that material nonlinearity is a factor influencing greatly the stability coefficient that can not be overlooked. The stability coefficient descends consumedly when considering the dual non-linearity.
出处
《交通科技》
2009年第2期4-7,共4页
Transportation Science & Technology
关键词
特征值
非线性稳定
有限元
eigenvalue
nonlinear stability analysis
finite element
