卷边翼缘工形截面构件在轴心压力作用下的稳定承载力研究  

LOAD-CARRYING CAPACITY OF LIPPED H-SECTION MEMBERS UNDER AXIAL LOAD

作　　者：郭彦林[1] 张婀娜[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《工业建筑》2009年第9期7-14,共8页Industrial Construction

摘　　要：与普通工形截面比较,卷边工形截面构件由于卷边的存在增强了翼缘的抗压屈曲能力,进而提高了截面的承载效率,是一种新型的薄壁截面构件。采用大挠度弹塑性板壳有限元分析方珐,对卷边工形构件在轴心压力作用下的稳定承载性能进行了研究。在考虑构件与板件几何初始缺陷和截面残余应力的情况下,研究了卷边工形截面参数(截面宽高比、腹板高厚比、翼缘宽厚比)与构件长细比的变化对轴心压力构件稳定承载性能的影响。最后,在大量数值分析结果的基础上,归纳总结出了卷边工形构件在轴向压力作用下的稳定承载力设计公式。As a new type of steel sections, lipped H-section members have excellent load-carrying efficiency and economic efficiency, compared with common H-section members. The load-carrying capacity of lipped H-members under axial load is studied by FEM, where with the large deformation, material elastic-plasticity, the geometric initial deflects and residual stress of the members taken into account, the influence of sectional geometric parameters and slenderness ratio on loadcarrying capacity of the lipped H-section members are analyzed. Finally, based on a lot of FEA numerical results obtained, the design formulas are obtained for predicting load-carrying capacity of lipped H-members under axial loads.

关 键 词：卷边工形构件 局部屈曲 畸变屈曲 稳定承载力 长细比 

分 类 号：TU392.1[建筑科学—结构工程]