下载后可任意编辑板的局部屈曲及屈曲后极限承载力分析板的局部屈曲及屈曲后极限承载力分析 肖军 丛磊 王海城 郭湘 摘要:板的局部屈曲受截面类型控制,Eurocode 法律规范根据板的局部屈曲的情况划分了四种截面,其中截面类型 I~III 的承载能力由于构件整体失稳而降低,类型 IV 截面承载能力因板的局部屈曲而削弱
针对类型 IV 截面,板的屈曲临界荷载及最大极限荷载进行了算例计算
讨论表明:①受压板首先发生局部屈曲,在屈曲区域退出工作后,外部框架继续承载直至材料屈服 ;② 屈曲后最大极限荷载较屈曲临界荷载提高约 36%;③ 考虑加劲肋的板的极限承载力较无加劲肋的板有较大程度的提高
Abstract: The local buckling of the plate is controlled by the type of section
The Eurocode proposes four sections according to the local buckling of the plate, of which the bearing capacity of the type I~III is reduced because of the global buckling , and the bearing capacity of type IV section is weakened by the local buckling of the plate
The buckling critical load and the maximum ultimate load of the type IV section plate are calculated
The research shows that: ①the local buckling of the compr