本文对格构式变截面吊臂金属结构的临界力计算作了理论分析。

This paper theoretically analyzes the critical force in metal hoisting boom structure of lattice type and variable section.

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从结构的几何非线性分析着手，研究截面为三角形的空间格构式斜腿刚架的平面内整体稳定。

Based on the geometric non-linear analysis, the in-plane global stability of Space Lattice Tilted Column Frame of Triangle Section(SLTCF)is studied.

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针对本工程为重型钢结构，对厂房采双层格构式刚性支撑方案，单位面积用钢量节省10%左右。

For this project is a heavier steel structure, plant production double-layer lattice rigid support scheme, the amount of steel per unit area save about 10%.

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