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 compression plate is first occurred, and the external frame continues to bear until the material yield after the buckling region exit;②the maximum ultimate load after buckling is about 36% higher than that of the critical buckling load;③the ultimate bearing capacity of plates considering stiffeners is greatly improved compared with those without stiffeners. 關键词:受压板;局部屈曲;屈服;极限荷载 Key words: compression plate;local buckling;yield;ultimate load 1下载后可任意编辑 中 图 分 类 号 : U442 文 献 标 识 码 : A 文章编号:1006-4311(20XX)15-0145-04 0 引言 屈曲是一种不稳定的现象,当宽厚比较大的薄壁板(平的或者弯曲的都有可能)承受轴向压力(即压缩)时,就有可能发生这种现象[1]。在一个特定的临界荷载下,板有可能在横向面外方向突然失稳。假如结构...