建筑结构学报2017，Vol.38Issue(12)：41-48,8.DOI:10.14006/j.jzjgxb.2017.12.005
复式薄壁方钢管混凝土长柱轴压稳定性能研究
Stability of composite concrete-filled square thin-walled steel tubular slender columns under axial compression
摘要
Abstract
Eight composite concrete-filled square thin-walled steel tubular (CCFSTST) slender columns under axial compression were designed and fabricated.Through the experiments,the effects of the slenderness ratio and the crosssectional type on axial compressive resistance of CCFSTST slender columns were studied.The test results indicate that the resistance of the column is reduced with the increasing of the slenderness ratio.Through embedding high-strength concrete-filled circular steel tube,the resistance of the composite column is improved by 33％.After embedding a circular steel hollow tube,the resistance of the composite column is reduced by 14％.The CCFSTST slender columns with a solid cross-section exhibit higher residual load-canying capacity and ductility.Based on the ABAQUS and the relative constitutive models,the finite element (FE) models of CCFSTST slender columns were developed.The predicted results agreed well with the test results.Based on the FE model,the mechanical behavior analysis and parametric analysis were carried out.The analysis indicates that the influences of the welding residual stress and coldforming on the axial compressive resistance are less than 1.5 ％.Meanwhile the above influences are offset.Thus,they can be ignored for the behavior analysis.With the increasing of the yield strength of the inner steel tube,concrete strength or diameter to width ratio,the stability coefficients of the CCFSTST slender column with a solid cross-section are decreased.The simplified model was proposed to predict the axial compressive resistance of CCFSTST slender columns.The predictions agreed well with the test results.关键词
复式薄壁方钢管混凝土/长柱/纵向加劲肋/轴压试验/有限元模型/轴压承载力Key words
composite concrete-filled square thin-walled steel tubular (CCFSTST)/slender column/longitudinal stiffener/axial compressive test/finite element (FE) model/axial compressive resistance分类
建筑与水利引用本文复制引用
王志滨,高扬虹,池思源,黄冀卓..复式薄壁方钢管混凝土长柱轴压稳定性能研究[J].建筑结构学报,2017,38(12):41-48,8.基金项目
国家自然科学基金项目(51308124),福建省自然科学基金项目(2017J01696). （51308124）
