Cold-formed thin-walled steel structure is widely used because of its light weight, high strength, and easy construction. C-section member with web perforate is commonly used as a load-bearing member in cold-formed thin-walled steel structures. To investigate the influence of various buckling modes, i.e., local, distortional, global buckling and their interactions, on the behaviour of cold-formed steel beam-columns, a numerical study was undertaken to analyze the elasticity and elastoplasticity of cold-formed thin-walled C-section steel perforated member and investigate the influences of hole size, position and form on the member performance. Based on the numerical study, the direct strength method (DSM) curve for the compression member without holes was modified. The results show that the numerical model is verified by the existing test data. The holes will have a certain impact on the critical load of the member, and will reduce the bearing capacity. This study proposes the associated DSM design curve in cold-formed thin-walled C-section steel perforated member, and reveals the associated distortional and global buckling mode interactions.
REN Chong,LIU Qiuting,WANG Binhua,DAI Liusi
. Numerical Analysis and Design Method of Cold-Formed Thin-Walled
C-Section Steel Perforated Member[J]. Journal of Shanghai Jiaotong University, 2020
, 54(10)
: 1084
-1093
.
DOI: 10.16183/j.cnki.jsjtu.2019.023
［1］徐宏艳. 冷弯薄壁腹板开孔C形钢梁稳定承载性能研究［D］. 北京: 清华大学, 2011.
XU Hongyan. Study on stability bearing capacity of the web opening C-shaped cold-formed steel beam［D］. Beijing: Tsinghua University, 2011.
［2］HANCOAK G J. Local, distortional, and lateral buckling of I-beams［J］. Journal of the Structural Division, 1978, 104(11): 1787-1798.
［3］CAMOTIM D, DINIS P B. Coupled instabilities with distortional buckling in cold-formed steel lipped channel columns［J］. Thin-Walled Structures, 2011, 49(5): 562-575.
［4］MARTINS A D, CAMOTIM D, DINIS P B. On the influence of local-distortional interaction in the beha-vior and design of cold-formed steel web-stiffened lipped channel columns［J］. Thin-Walled Structures, 2016, 101: 181-204.
［5］DINIS P B, YOUNG B, CAMOTIM D. Strength, interactive failure and design of web-stiffened lipped channel columns exhibiting distortional buckling［J］. Thin-Walled Structures, 2014, 81(81): 195-209.
［6］何子奇, 周绪红, 刘占科, 等. 冷弯薄壁卷边槽钢轴压构件畸变与局部相关屈曲试验研究［J］. 建筑结构学报, 2013, 34(11): 98-108.
HE Ziqi, ZHOU Xuhong, LIU Zhanke, et al. Experimental investigation of cold-formed thin-walled lipped channel steel columns experiencing local-distortional interactive buckling under axial compression［J］. Journal of Building Structures, 2013, 34(11): 98-108.
［7］何子奇, 周绪红, 邹勃, 等. 冷弯薄壁型钢轴压构件畸变与整体相关屈曲承载力计算方法研究［J］. 建筑结构学报, 2019, 40(3): 192-199.
HE Ziqi, ZHOU Xuhong, ZOU Bo, et al. Calculation-method investigation on ultimate loading-carrying capacities of cold-formed steel columns experiencing distortional-global buckling interaction under axial compression［J］. Journal of Building Structures, 2019, 40(3): 192-199.
［8］REN C, ZHAO X Z, CHEN Y Y. Buckling behavior of partially restrained cold-formed steel zed purlins subjected to transverse distributed uplift loading［J］. Thin-Walled Structures, 2016, 114: 14-24.
［9］KEERTHAN P, MAHENDRAN M. Experimental studies of the shear behavior and strength of lipped channel beams with web openings［J］. Engineering Structures, 2013, 73(2): 131-144.
［10］ZHAO X Z, REN C, QIN R. An experimental investigation into perforated and non-perforated steel sto-rage rack upright ［J］. Thin-Walled Structures, 2017, 112: 159-172.
［11］王春刚, 梁润嘉, 张壮南, 等. 腹板开孔复杂卷边冷弯薄壁槽钢受弯构件稳定性试验研究［J］. 建筑结构学报, 2014, 35(4): 125-134.
WANG Chungang, LIANG Runjia, ZHANG Zhuangnan, et al. Experimental investigation on stability behavior of channel flexural members with complex edge stiffeners and web holes［J］. Journal of Building Structures, 2014, 35(4): 125-134.
［12］YUAN W B, YU N T, LI L Y. Distortional buckling of perforated cold-formed steel channel-section beams with circular holes in web［J］. International Journal of Mechanical Sciences, 2017, 126: 255-160.
［13］赵金友, 孙阔. 腹板开孔冷弯薄壁槽钢梁屈曲性能试验及直接强度法研究［J］. 建筑结构学报, 2018, 39(10): 93-102.
ZHAO Jinyou, SUN Kuo. Tests and direct strength method on buckling behavior of cold-formed thin-walled channel steel beams with web holes［J］. Journal of Building Structures, 2018, 39(10): 93-102.
［14］中华人民共和国建设部. 冷弯薄壁型钢结构技术规范: GB 50018—2002 ［S］. 北京: 中国计划出版社, 2002.
Ministry of Construction of the People’s Republic of China. Specification for design of cold-formed thin-wall steel structures: GB 50018—2002 ［S］. Beijing: China Planning Press, 2002.
［15］中华人民共和国建设部. 金属材料室温拉伸试验方法: GB/T 228—2010 ［S］. 北京: 中国计划出版社, 2010.
Ministry of Construction of the People’s Republic of China. Metallic materials tensile test procedure at ambient temperature: GB/T 228—2010 ［S］. Beijing: China Planning Press, 2010.
［16］中华人民共和国建设部.钢结构设计规范: GB 50017—2003 ［S］. 北京: 中国计划出版社, 2013.
Ministry of Construction of the People’s Republic of China. Standard for design of steel structures: GB 50017—2003 ［S］. Beijing: China Planning Press, 2013.
［17］YOUNG B, KWON B, HANCOCK G J. Tests of cold-formed channels with local and distortional buckling［J］. Journal of Structural Engineering, 1992, 117 (7): 1786-1803.
［18］王斌华. 开孔冷弯薄壁C型截面压弯构件的破坏机理研究与承载力预测［D］. 上海: 同济大学, 2018.
WANG Binhua. Buckling interaction failure mechanism investigation and load prediction of cold-formed steel perforated members subject to compression and bending［D］. Shanghai: Tongji University, 2018.
［19］SCHAFER B W. Review: The direct strength me-thod of cold-formed steel member design［J］. Journal of Constructional Steel Research, 2008, 64(7): 766-778.
［20］MOEN C D, SCHAFER B W. Direct strength me-thod for design of cold-formed steel columns with holes［J］. Journal of Structural Engineering, 2011, 137(5): 559-570.
［21］王春刚, 张耀春. 卷边槽钢偏心受压构件极限承载力的直接强度计算方法研究［J］. 工程力学, 2009, 26(2): 97-102.
WANG Chungang, ZHANG Yaochun. Direct strength-method study on ultimate load-carrying capacity of eccentric loaded lipped channels［J］. Engineering Mechanics, 2009, 26(2): 97-102.
