Experimental Research on the Bond-Slip Behavior of Red Mud Concrete Filled Square Steel Tubes

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Wu, Bin^1,2 ; Tan, Zhuoying^1 ; Zhang, Yongdan^2 ; Zhao, Zhonghua^3 ; Liu, Chengxue^3

School of Civil and Resource Engineering, University of Science and Technology Beijing, China^1

Department of Construction Engineering, Liaoning Provincial College of Communications, Shenyang Liaoning, China^2

Shenyang Urban Construction University, Shenyang Liaoning, China^3

关键词: Concrete-filled square steel tube;    Experimental research;    Length diameter ratio;    Replacement rates;    Strength increase;    Substitution rates;    Variable parameters;    Width-to-thickness ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/3/032016/pdf
DOI  :  10.1088/1757-899X/394/3/032016

来源: IOP

【 摘 要 】

In order to study the bond slip behavior of red mud concrete-filled square steel stubs, fifteen red mud concrete filled square steel tubes short column specimens were designed for the push-out test. Five parameters including replacement rate of red mud mass, concrete strength, embedment length, length diameter ratio, width to thickness ratio were regarded as variable parameters in the experiment. Through experiment, the load-slip curves of red mud concrete filled square steel tubes were obtained and analyzed.The results show that the load slip curves of red mud concrete filled square steel tubes can be classified into five stages: no slipping section, ascending section, descending section, re-ascending section and re-descending section.The bond strength increases first and then decreases with the increase of red mud substitution rate.When the substitution rate of red mud is 5%, the bond strength reaches the maximum. When the substitution rate of red mud is 20%, the bond strength is equivalent to that of normal concrete filled steel tube.