方钢管自密实铁尾矿混凝土短柱偏压力学性能  

Biasing mechanical properties of self-compacting iron tailings concrete short columns of the square steel tubes

作　　者：王元熙 杜喜凯[1] 刘京红 WANG Yuanxi;DU Xikai;LIU Jinghong(Urban and Construction College,Hebei Agricultural University,Baoding 071001,China;Department of Civil Engineering,Tianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]河北农业大学城乡建设学院,河北保定071001 [2]天津城建大学土木工程学院,天津300384

出　　处：《河北大学学报（自然科学版）》2020年第4期351-359,共9页Journal of Hebei University(Natural Science Edition)

基　　金：河北省教育厅重点资助项目(ZD2019117);河北省教育厅在读研究生创新能力培养项目(CXZZSS2019058);河北农业大学理工基金重点资助项目(ZD201403)

摘　　要：通过10根方钢管自密实铁尾矿混凝土偏压短柱的实验,研究含钢率、铁尾矿粉替代率和偏心距对其力学性能的影响,并将实验承载力与各规范计算所得承载力进行比较.结果表明:试件承载力、延性系数及抗弯刚度随含钢率的增大而显著增长;增大铁尾矿粉替代率,试件抗弯刚度降低,承载力与延性系数无明显变化;增大偏心距,试件承载力、抗弯刚度降低但延性系数提高.Based on the test of 10 square steel tubes with self-compacting iron tailings concrete eccentric compression short columns,this work analyzed the mechanical properties of the test piece affected by the steel content,iron tailings powder replacement rate,and eccentricity,and compared the test bearing capacity with the calculated bearing capacity of each specification.The results show that,with the increase of steel content,the bearing capacity,ductility coefficient and flexural rigidity of the specimen increase significantly;with the substitution rate of iron tailings powder increases,the bending stiffness of the specimen decreases,and there is no obvious change in the bearing capacity and ductility coefficient;with the eccentricity increases,the bearing capacity and bending stiffness of the specimen decrease while the ductility coefficient increases.

关 键 词：铁尾矿粉 钢管混凝土 自密实混凝土 偏压短柱 

分 类 号：TU398.9[建筑科学—结构工程]