建筑结构学报2017，Vol.38Issue(10)：10-20,11.DOI:10.14006/j.jzjgxb.2017.10.002
双肢冷弯薄壁型钢拼合箱形柱受压试验研究与有限元分析
Experimental study and numerical analysis on double limb cold-formed steel built-up closed section columns under compression
摘要
Abstract
The 30 specimens of cold-formed steel with C and [shape member built-up closed section columns were tested under axial and eccentric compression.The load-displacement curves and maximum load of specimens were obtained.The buckling modes and failure characteristics were analyzed.The ABAQUS was used to simulate the compressive behavior of specimens and analyze the influence factors.The influence parameters included slenderness ratio,height-thickness ratio of web,height-width ratio of section,eccentric distance and eccentric direction on columns.The results show that the failure modes of long-height and mid-height specimens under axial compression are overall buckling around weak axis,while that of short-height specimens are plastic flexure caused by excessive local buckling.Specimens under eccentric compression around strong axis and weak axis are bending torsional buckling and overall buckling respectively.The axial compressive maximum load and stiffness of specimens decrease with the increase of slenderness ratio.With the increase of height-thickness ratio of web,axial compressive maximum load of specimens decreases gradually.The height-width ratios of specimens are big and the slenderness ratios around the two main axes are different greatly,so that the maximum load of specimens can be improved significantly by increasing the flange width as well as to increase the equistability of specimen around strong axis and weak axis.The maximum load of specimens under eccentric compression decreases with the increase of eccentricity.关键词
双肢拼合箱形柱/冷弯薄壁型钢/静力试验/有限元分析/受压性能Key words
double limb built-up box section column/cold-formed steel/static test/FEA analysis/compressive behavior分类
建筑与水利引用本文复制引用
聂少锋,周天华,周绪红,李方涛,孙玉金..双肢冷弯薄壁型钢拼合箱形柱受压试验研究与有限元分析[J].建筑结构学报,2017,38(10):10-20,11.基金项目
国家自然科学基金项目(51408052),高等学校博士学科点专项科研基金项目(20110205110006),陕西省工业攻关项目(2014K06-23). （51408052）
