冷弯薄壁型钢柱畸变屈曲承载力研究  

RESEARCH ON DISTORTIONAL BUCKLING BEARING CAPACITY OF COLD-FORMED THIN-WALLED STEEL COLUMNS

作　　者：姚永红[1] 武振宇[2] 

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《工业建筑》2016年第4期142-146,共5页Industrial Construction

基　　金：国家自然科学基金项目(51508001);安徽省博士后基金项目(2014B010);住房与城乡建设部项目(2014-K2-033)

摘　　要：冷弯薄壁型钢构件由于自身的诸多优点,已广泛应用于建筑结构之中。分析发现现有柱试件畸变屈曲承载力计算值不能较好地反映试验规律,并且弹性畸变屈曲应力公式计算过程较繁琐。经过理论分析,提出考虑畸变与整体相关屈曲的直接强度法设计公式,给出无需迭代的转动约束刚度建议公式以用于弹性畸变屈曲应力的计算。通过与试验数据对比发现,所提出的建议公式可以较安全地计算柱试件的畸变屈曲承载力,其计算值随柱长增加而减小,符合试验规律,可为《冷弯薄壁型钢结构技术规范》的修订提供参考。Cold-formed thin-walled steel has been used widely in building structures due to its many advantages. It has been found that the existing calculated values of distortional buckling bearing capacity of columns can＇t reflect the experimental law well,and the calculation process of elastic distortional buckling stress is too cumbersome. The suggested direct strength method considering distortional and global interactive buckling and a rotational restraint calculation formula without iteration used for estimating the elastic distortional buckling stress was presented. The values of distortional buckling bearing capacity calculated by proposed method were safe compared with the experiment data,and decreased with the increasing of the column length,which was in accord with the experimental law. Which provided a reference for revision of Technical Code of Cold-Formed Thin-Walled Steel Structures in the future.

关 键 词：冷弯薄壁型钢 畸变屈曲 直接强度法 承载力 

分 类 号：TU392.1[建筑科学—结构工程]