腹板开孔冷弯薄壁卷边槽钢受弯构件整体屈曲性能分析  

ANALYSIS ON OVERALL BUCKLING OF COLD-FORMED THIN-WALLED STEEL LIPPED CHANNEL BEAMS WITH WEB OPENINGS

作　　者：姚行友[1,2] 程国威 郭彦利 周水 杨嘉宝 YAO Xingyou;CHENG Guowei;GUO Yanli;ZHOU Shui;YANG Jiabao(School of Civil and Architectural Engineer,Nanchang Institute of Technology,Nanchang 330099,China;Jiangxi Province Key Laboratory of Hydraulic&Civil Engineering Infrastructure Security,Nanchang 330099,China)

机构地区：[1]南昌工程学院土木与建筑工程学院,南昌330099 [2]南昌工程学院江西省水利土木工程基础设施安全重点实验室,南昌330099

出　　处：《工业建筑》2021年第10期101-108,100,共9页Industrial Construction

基　　金：国家自然科学基金项目(51868049);江西省自然科学基金项目(20181BAB206040);江西省教育厅科学技术研究项目(GJJ180932,GJJ170983);2020年南昌工程学院研究生创新计划项目(YJSCX202015)。

摘　　要：采用有限元分析软件ABAQUS对腹板开孔冷弯薄壁卷边槽钢受弯构件的开孔类型、开孔大小、开孔间距等参数进行分析,研究腹板开孔对构件整体屈曲性能的影响。结果表明:开孔大小对不同截面尺寸构件整体稳定影响较大;整体稳定系数φ;随着圆孔直径的增大或矩形孔高度和长度的增大而降低;当孔间距大于一定限值后对整体稳定系数φ;影响不大。基于腹板开孔受弯构件整体屈曲系数的有限元分析结果,提出了腹板开矩形孔和圆孔的弯薄壁型钢卷边槽形截面受弯构件整体稳定系数修正建议式。并将整体稳定系数修正建议式的计算结果与北美规范计算结果和有限元分析结果进行对比,表明建议计算方法是精确可行的,可用于冷弯薄壁型钢卷边槽形截面受弯构件整体稳定系数的计算。The finite element software ABAQUS was used to analyze the influence of web openings on the overall buckling coefficient cold-formed thin-walled steel lipped channel beams with web openings considering the type,size and position of openings. The analysis results showed that the size of the opening had a greater influence on the overall buckling coefficient for bending members. The overall buckling coefficients φbof bending members decreased with the increase of diameter of the circular opening or length and width of rectangular opening. The opening spacing had a slight effect on the overall buckling coefficient when it met a limit value. Then the calculation method of overall buckling coefficient of cold-formed thin-walled lipped channel steel bending members with circle or rectangular openings in the web was presented based on the finite element parameters analysis. Finally,the comparison on the overall buckling coefficient between predictions with proposed method and finite element results and results by using AISI showed a great accuracy and feasibility. The proposed method could be used to predict the overall buckling coefficient of cold-formed thin-walled lipped channel steel members with circle or rectangular openings in the web.

关 键 词：冷弯薄壁型钢 受弯构件 腹板开孔 整体屈曲 稳定系数 

分 类 号：TU392.1[建筑科学—结构工程]