工字形截面楔形单元弹性稳定单元刚度矩阵的推导与探讨

Element Stiffness Matrix of Elastic Stability for I - Tapered Element

推导了工字形截面薄壁楔形构件的稳定计算中的单元刚度矩阵,通过分析对比得出在楔形构件的稳定计算中,如果是弯扭失稳,则必须采用楔形单元矩阵。本文推导出的楔形杆件在任意荷载下的弹性稳定单元刚度矩阵,可用其直接形成总刚度矩阵,解算楔形杆的稳定问题。

Element stiffness matrix which is applied in stability calculation of I - section thin - wall tapered member is deduced. By analysis and contrast, the conclusion is obtained: in the stability calculation of tapered member , if the buckling is the lateral - torsional buckling, it must use the tapered element matrix to solve the stability problem.