摘要
把高阶的位移代数函数运用于变截面双轴对称的梁柱单元 ,根据最小势能原理 ,推导出变截面双轴对称梁柱单元的切线、割线刚度矩阵和几何刚度矩阵。对于线性变化的圆柱、圆管、工字型构件等给出了统一的刚度矩阵形式 ,并编制了相应的非线性分析程序。通过几个算例 ,证明了变截面单元的可行。
The tangent,secant and geometric stiffness matrices of a tapered biaxisymmetric beam column element are derived according to the minimum potential energy theory,applying the displacement algebraic function of high order to the tapered biaxisymmetric beam column element A uniformized form of stiffness matrices is given to the linear tubular column,tubular and I shape member etc;and the corresponding non linear analysis programs are also worked out The feasibility,high efficiency and stability of the frame with the tapered members are proved by several calculation examples
出处
《钢结构》
2002年第6期39-42,共4页
Steel Construction
关键词
变截面
框架
二阶非线性
梁柱单元
second order analysis variable cross section frame beam column element
