重庆大学学报2026，Vol.49Issue(1)：82-93,12.DOI:10.11835/j.issn.1000-582X.2026.01.008
蜂窝梁畸变屈曲性能研究
Research on distortional buckling performance of castellated beams
摘要
Abstract
To investigate the distortional buckling performance of castellated beams,six castellated beam specimens were subjected to static load at the mid-span.The corresponding failure modes,load-vertical displacement responses,and web deformed shape curves of specimens were obtained.The results indicate that all six specimens failed in a distortional buckling mode.Specifically,the compressive flange of the entire specimens exhibited an S-shaped curve upon failure.Meanwhile,out-of-plane bulging deformation occurred in the web post section at the mid-span loading location.With the increase of castellated beam length,both the initial stiffness of the load-vertical displacement curve and the critical distortional buckling capacity reduced.Results of the distortional buckling strengths obtained from the experiments were further compared with the predications calculated using the modified method suggested by AS4100,AISC,and Nethercot and Trahair.The comparison results show that the predications of the AS4100 method and the Nethercot and Trahair approach are in good agreement with the test results.关键词
蜂窝梁/局部屈曲/畸变屈曲/临界荷载Key words
castellated beams/local buckling/distortional buckling/critical load分类
建筑与水利引用本文复制引用
李井超,周绪红,何子奇..蜂窝梁畸变屈曲性能研究[J].重庆大学学报,2026,49(1):82-93,12.基金项目
湖南省教育厅科学研究项目(24C0443) （24C0443）
益阳市科技创新计划项目(2025YR02) （2025YR02）
湖南省普通本科高校教学改革研究项目(202502001257).Supported by the Research Foundation of Education Bureau of Hunan Province(24C0443),the Science and Technology Innovation Program of Yiyang City(2025YR02),and the Undergraduate Teaching Reform Research Project of Hunan Province(202502001257). （202502001257）
