弧形钢闸门支臂空间屈曲荷载研究

在材料线弹性范围内，运用屈曲问题的有限单元法，采用MSC公司开发的大型结构分析软件NASTRAN，探讨了各种因素对弧形闸门支臂空间极限承载力的影响规律，从而获得支臂腹杆和弦杆的最佳布置方式。实例分析指出，支臂杆的截面特性、支臂腹杆的布置方式、弦杆的布置位置、上下支臂的作用荷载及支铰约束等因素对支臂空间极限承载力都有影响，分析结果对弧门支臂稳定问题进行理论探讨和实际工程设计有一定的参考价值。

Study on Influence Factors of Space Critical Load on Steel Radial-gates Column

This paper,at the scope of material linear-elastic,making use of bulking FEM method, and with aid of the commercial large-scale structure analysis software: NASTRAN,inquires into the influencing law that the load applied on the columns and the column's pole layout. From example analysis points out that the radial gate column's critical force connected with the column's section geometry properties, layout form and the location of the inclined vaulting pole and the paralleled pole, the restrain and so on. The analysis conclusions have practical significance for theoretical analysis of the radial gate column's stable and design of the radial gate.