建筑结构学报2017，Vol.38Issue(11)：42-48,7.DOI:10.14006/j.jzjgxb.2017.11.005
开孔钢板加劲肋方钢管混凝土柱偏压试验研究
Experimental study on concrete-filled square steel tubular column stiffened with PBL subjected to eccentric compressive load
摘要
Abstract
To strengthen the composite action of square steel tube and inside concrete,PBL connectors are proposed in concrete-filled square steel tubular columns.With the parameters of slenderness ratio and eccentricity,tests on the mechanical behavior of concrete-filled square steel tubular column stiffened with PBL under eccentric compressive load were carried out.To investigate the role of PBL,the contrast tests on specimens of concrete-filled square steel tubular column and concrete-filled square steel tubular column with steel plate stiffener were also carried out.Test results indicate that failure modes of specimens with PBL stiffener and steel plate stiffener are steel tube double wave buckling at compressive side.For the specimen without stiffener is single wave buckling failure.Ultimate bearing capacity of specimen with PBL stiffener is 6.95％ higher than specimen without stiffener,and is 4.33％ lower than specimen with steel plate stiffener.PBL stiffener can make steel tube and concrete work together better.The concrete crack distribution is more uniform,and the width and spacing of concrete crack are smaller.Based on the simplified calculation method of concrete-filled square steel tubular column,considering the role of PBL stiffener and concrete tendon,the ultimate bearing capacity formula for concrete-filled square steel tubular column stiffened with PBL subjected to eccentric compressive load was proposed,which can provide calculated results agreeing well with the experimental results.关键词
方钢管混凝土柱/PBL加劲肋/偏压试验/承载能力Key words
concrete-filled square steel tubular column/PBL stiffener/eccentric compression test/ultimate bearing capacity分类
建筑与水利引用本文复制引用
刘君平,周宗源,刘永健,陈宝春..开孔钢板加劲肋方钢管混凝土柱偏压试验研究[J].建筑结构学报,2017,38(11):42-48,7.基金项目
国家自然科学基金项目(51378068),国家西部交通建设科技项目(2013318812410). （51378068）
