摘要
利用ABAQUS有限元软件建立的有限元模型考虑了材料、接触非线性和几何缺陷等因素,分析了试件长细比、腹板宽厚比对拼合柱的极限承载力影响。分析结果表明:长细比对冷弯薄壁型钢四肢双箱形的轴压极限承载力有较大影响,随拼合柱长细比的增加,拼合柱极限承载力逐渐降低;由不同板材厚度引起试件腹板宽厚比的不同对相同长度试件的极限承载力以及刚度有较大影响;板材厚度和试件长度相同时,试件腹板高度从92mm增加到143mm,试件的极限承载力变化不大。
The finite element model involving materials nonlinearity,contact nonlinearity and geometric nonlinearity was established by using ABAQUS finite element program,the influences of slenderness ratios and web width-thickness ratios on built-up columns under axial compression were analyzed. Results show that the slenderness ratio has great influence on the bearing capacity of axial compression for cold-formed thin-walled steel four limbs built-up columns,with the increase of the built-up column slenderness ratio,the ultimate bearing capacity decreases gradually. As different thicknesses of the basic component plates cause different width-thickness ratios of the section,the ultimate bearing capacity of axial compression and the rigidity are great affected. When thickness and length of the built-up column are same,and the basic component web height is increased from 92 mm to 143 mm,the ultimate bearing capacity of the built-up column is not obviously improved.
出处
《施工技术》
CAS
北大核心
2014年第S2期412-415,共4页
Construction Technology
基金
高等学校博士学科点专项科研基金项目(20110205110006)
陕西省自然科学基金项目(2012JQ7014)
陕西省工业公关项目(2014K06-23)
关键词
冷弯薄壁型钢
拼合柱
极限承载力
有限元分析
cold-formed thin-walled steel
built-up column
ultimate bearing capacity
finite element analysis
