高强钢薄壁箱形截面轴压构件整体稳定承载能力研究-

Industrial Construction Vol．46,No．12,2016工业建筑一2016年第46卷第12期一123一??????????????????????

??现代钢结构高强钢薄壁箱形截面轴压构件整体稳定承载能力研究?高一磊一江克斌一白林越一何晓晖(中国人民解放军理工大学野战工程学院,南京一210007)一一摘一要:为研究18Mn2CrMoBA 高强钢材轴心受压构件的整体稳定承载能力,对8个高强钢板冷弯成槽形并对焊成形的薄壁箱形截面构件进行轴心受压试验研究三通过建立有限元模型分析高强钢薄壁箱形截面压杆稳定承载力,分析对比发现计算结果与试验结果吻合良好三利用有限元软件分析了48个不同截面二不同长细比的构件,将试验结果二有限元分析结果与GB 50017 2003‘钢结构设计规范“进行对比,发现其比b 类曲线高二比a 类曲线略低三建议该类杆件的设计采用GB 50017 2003的b 类曲线三一一关键词:高强钢;薄壁箱形截面;稳定试验;有限元分析;整体稳定承载力一一DOI :10．13204/j.gyjz201612024RESEARCH ON OVERALL STABILITY BEARING CAPACITY OF HIGH STRENGTH STEEL THIN-WALLED BOX SECTION MEMBERS UNDER AXIAL COMPRESSION Gao Lei一Jiang Kebin一Bai Linyue一He Xiaohui (College of Filed Engineering,PLA University of Science and Technology,Nanjing 210007,China)Abstract :In order to study the overall stability bearing capacity of 18Mn2CrMoBA high strength steel member under axial compression,8thin-walled box section specimens formed by two channel plates were tested.The finite element model was used to analyze the stability bearing capacity of thin-walled box section members of high strength steel,and the calculated results through finite element analysis had a good agreement with test results by comparing.Forty-eight members with different sections and slenderness ratios were https://www.360docs.net/doc/ed10986167.html,paring test results and finite element analysis results with the column curves in Code for Design of Steel Structures (GB 50017 2003),it was found that they were higher than the column curve b but lower than the column curve a.The column curve b in GB 50017 2003can be employed to design such structural members.Keywords :high strength steel;thin-walled box section;stability test;finite element analysis;overall stability bearing capacity ?国家重点基础研究发展计划项目(2014CB046801,2014CB046804);国家自然科学基金项目(51178458)三第一作者:高磊,男,1981年出生,讲师三

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收稿日期:2016-05-20一一与普通钢材相比,高强度钢材(通常指屈服强度不低于420MPa [1])具有强度高二韧性好等优点,在建筑结构使用时能减少运输安装二焊接等工作量,具有可观的经济效益[2]三目前日本二美国等国已经有较多的高强钢建筑工程实例[3-4],屈服强度大多在460~690MPa三近几年国内也出现了越来越多的高强钢建筑,如央视新楼[5]二凤凰国际传媒中心[6]等,主要采用钢材为Q460钢三虽然高强钢已广泛应用于实际工程,但国内外还没有专门针对高强钢构件的设计标准三GB 50017 2003‘钢结构设计规范“涉及的钢材最大屈

服强度为420MPa [7],因此有必要开展有关高强钢构件稳定设计方面的研究三目前国内外学者已经开展了一些有关高强钢稳定性方面的研究三Yang 等对由高强钢材料G550(屈服强度为550MPa)制成的短柱和长柱进行了大量试验,对其局部和整体相关屈曲进行了研究,并借助有限元软件ABAQUS 进行了数值模拟[8-9]三施刚等对国产Q460高强钢焊接箱形截面柱稳定性能以及S690和S960(欧洲钢万方数据