变截面工形柱平面内弹塑性极限承载力研究

Analysis of ultimate load of elastic-plastic in-plane tapered I-shaped column

应用非线性有限单元法对变截面工形柱平面内弹塑性极限承载力进行了几何非线性分析。利用牛顿—拉弗森法和弧长法对荷载—位移平衡路径进行跟踪研究,研究了翼缘宽厚比对结构极限承载力的影响;分析中考虑了不同楔率和长细比等因素对构件极限承载力的影响,提出实用计算公式,获得对工程结构设计有益的结论。

Based on natural characteristic of tapered Ⅰ-shaped column, Ansys FEM program was used to simulate its geometrical nonlinear behavior with beam element . With Newton-Raphson and arc-length calculation method, this paper has made research on effect of tapering ratio and slenderness ratio on ultimate bearing capacity. This work gives some reference for technical application of tapered Ⅰ-shaped column.