Experimental study on performance of steel slag concrete filled elliptical steel tubular stub columns under axial load

被引：0
|
作者：
Shen Q. [1 ,2 ]
Gao B. [1 ]
Wang J. [1 ,3 ]
Wang C. [1 ]
机构：
[1] School of Civil Engineering, Hefei University of Technology, Hefei
[2] Anhui Key Laboratory of Civil Engineering Structures and Materials, Hefei University of Technology, Hefei
[3] Anhui Collaborative Innovation Center for Advanced Steel Structure Technology and Industrialization, Hefei University of Technology, Hefei
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2021年 / 42卷
关键词：
Axial compression test; Elliptical section steel tube; Failure mode; Steel slag concrete; Strength design method; Stub column;
D O I：
10.14006/j.jzjgxb.2021.S2.0023
中图分类号：
学科分类号：
摘要：
Currently, the cumulative storage of the steel slag in China has exceeded 1.8 billion tons, whereas the utilization rate of the steel slag is limited at 20%-30%, which is much less than that at developed countries. Hence, the cumulative steel slag results in massive waste of farm land and serious pollution on the environment. To improve the comprehensive utilization of the steel slag and to promote its application in engineering practice, this paper conducted an experiment study on the axial compressive performance of elliptical steel tubes infilled with concrete which uses the steel slag to replace the coarse aggregate. The influence of steel-slag utilization ratio and the aspect ratio on the failure mode, axial resistance, stiffness and ductility of the steel slag concrete-filled elliptical steel tubular (SCFET) columns was revealed. Moreover, the contribution of the steel slag on the axial compressive resistance of the SCFET stub columns was figured out. Finally, a design method for predicting the resistance of the axially-loaded SCFET stub column was proposed considering the effect of steel slag and the feature of the elliptical cross-section. The results indicated that the failure modes of the SCFET stub columns mainly included steel tube buckling, concrete crushing and shear failure. After the coarse aggregate of the ordinary concrete in elliptical steel tube was gradually substituted by the steel slag, improvements of 2.0%-15.1% in the axial compressive strength and 1.1%-16.8% in the stiffness were respectively obtained, while the ductility decreased with the steel-slag utilization ratio and the aspect ratio. The test results demonstrated that the design formulae proposed in this paper can predict the axial compressive resistance of the SCFET stub column accurately. This research may offer a scientific reference for the application and promotion of steel slag in concrete-filled steel tubular structures. © 2021, Editorial Office of Journal of Building Structures. All right reserved.
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页码：197 / 203
页数：6
相关论文
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