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LOCAL BUCKLING OF I-SECTIONS IN COMPRESSION AND BENDING
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摘要: 对压力和弯矩作用下工字形截面考虑板件间相互作用时的局部稳定性进行研究。在轴压下,得到精确的腹板弹性屈曲系数解析解;在压弯和弯曲作用下采用有限元方法求解;在轴压和弯曲单独作用情况下,拟合了精度很好的腹板屈曲系数计算公式;在压力和弯矩共同作用下则提出了压力和弯矩相关作用公式,拟合了相关作用公式中的指数。Abstract: Local buckling of I-sections in compression and bending was investigated.Exact buckling coefficients of the web plate in axial compression was determined by the buckling theory of plates; And when under both axial compression and bending moment, FEA was used to determine the buckling stress.Approximate formulas with excellent accuracy for the web plate in axial compression or in the bending moment were proposed, Under the axial compression and bending moment, a interaction relation between the axial stress and the bending stress was proposed．
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Key words:
- I-section /
- buckling /
- axial compression /
- bending /
- plate
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