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评估了开孔对于受压的热轧L型钢构件抗屈曲效应的影响。使用有限元数值模型来研究屈曲和非线性性能,从而测定有着一个以上开孔构件的临界荷载和极限荷载。试验结果显示,虽然开孔并没对临界荷载产生太大的影响,但当对一些中等长细比构件的截面中的一边进行普通尺寸的开孔时,它们的承载力则会明显降低。这意味着目前规范中所提供的方法并不完全保险。因此,测定其特有的稳定曲线并提出可替代的设计方法。
The effect of open hole on the buckling resistance of hot-pressed L-section steel members was evaluated. Finite element numerical models were used to study buckling and nonlinear behavior to determine the critical and ultimate loads with more than one open-hole member. The experimental results show that although the open hole does not have a significant impact on the critical load, the bearing capacity of the moderately slender members decreases significantly when they are cut into regular size on one side. This means that the methods currently provided in the specification are not fully insured. Therefore, its unique stability curve is determined and an alternative design method is proposed.