腹板开孔冷弯卷边槽钢轴压构件畸变屈曲分析  

ANALYSIS ON DISTORTIONAL BUCKLING OF COLD-FORMED THIN-WALLED STEEL LIPPED CHANNEL STEEL MEMBERS WITH WEB OPENINGS UNDER AXIAL COMPRESSION

作　　者：姚行友[1,2] 郭彦利 柳亚华 苏坚艺 胡翌 YAO Xingyou;GUO Yanli;LIU Yahua;SU Jianyi;HU Yi(School of Civil and Architectural Engineering,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》2020年第1期170-177,共8页Industrial Construction

基　　金：江西省教育厅科研技术研究项目(GJJ170983);国家自然科学基金资助项目(51868049);江西省科技厅自然科学基金项目(20181BAB206040);南昌工程学院第十六届“挑战杯”大学生课外学术科技作品竞赛项目

摘　　要：采用通用有限元软件ABAQUS,对冷弯薄壁型钢卷边槽形截面轴压构件的腹板开孔的类型、开孔大小、开孔位置等参数进行分析,研究腹板开孔对构件发生畸变屈曲时屈曲稳定系数k值的影响。结果表明:开孔位置会影响其屈曲模式;多孔间距存在一个安全距离;腹板开圆孔或长圆孔时,构件屈曲系数k有着不同程度的降低。根据影响开孔构件畸变屈曲的主要参数,提出了开孔构件的端距限值和孔间距限值;对腹板开圆孔和长圆孔冷弯薄壁卷边槽钢轴压构件的畸变屈曲稳定系数进行分析并给出了相应的建议计算式。The finite element software ABAQUS was used to analyze the influence on the k value of the elastic distortional buckling stability coefficient considering changing of the type of opening,the size and the position of opening in the paper.The results showed that the position of the opening would affect the buckling mode of members,there was a safe distance between the openings,and the buckling stability coefficient k of the members with circle or slotted opening in web had different degrees of reduction.Finally,according to the main influencing parameters,the limits of end distance and distance between the opening were presented,some relative simple formulas were proposed to calculate the distortional buckling stability coefficient of cold-formed thin-walled lipped channel steel members with circle or slotted opening in web.

关 键 词：轴心受压 冷弯薄壁型钢构件 腹板开孔 畸变屈曲 屈曲稳定系数 

分 类 号：TU392.1[建筑科学—结构工程]