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卷边工形截面构件作为一种高效型材,在弯矩与轴力共同作用下的破坏模型常常是伴随板件局部屈曲的整体失稳。利用板壳有限单元法,研究卷边工形截面构件在板件局部屈曲下的构件整体稳定承载力,建立其稳定承载力设计公式。首先,通过设计大量算例,研究了截面宽高比、腹板高厚比、翼缘宽厚比等截面参数对短柱承载性能的影响,其中考虑了板组之间屈曲的相关作用,获得了考虑板组局部屈曲特性的短柱稳定承载力相关公式。在短柱板件局部失稳承载力研究的基础上,计入构件长细比对长柱面内和面外稳定承载性能的影响,通过数值分析建立了卷边工形构件在压弯荷载作用下的稳定承载力设计公式。
As a kind of high-efficient profile, the bevel-shaped section member is a failure model under the joint action of the bending moment and the axial force. It is often the overall instability that accompanies the local buckling of the plate. Using the plate-shell finite element method, the overall stability bearing capacity of the member with a curled I-section section under local buckling of the panel is studied, and the formula for the design of its stable bearing capacity is established. Firstly, by designing a large number of examples, the effects of the cross-section parameters such as the aspect ratio, web ratio, flange width-thickness ratio on the bearing properties of the short column were studied. The related effects of the buckling between the plate groups were considered and obtained. The formula related to the stable bearing capacity of short columns considering the local buckling characteristics of plate groups. Based on the study of the local destabilizing bearing capacity of short-pillar plates, the effect of component slenderness ratio on the in-plane and out-of-plane steady-state bearing properties of the long cylinder is considered. The effect of the bevel-shaped components on the compression load is established through numerical analysis. Under the stable bearing capacity design formula.