Materials Reports  2019, Vol. 33 Issue (Z2): 327-330 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Experimental Study on Axial Compression of Concrete Filled Steel TubularShort Columns with Different Expansion Agents |
| DING Xindong1, CAO Xinming1,2
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1 College of Civil Engineering, Guizhou University, Guiyang 550025;
2 Key Laboratory of Structural Engineering,Guizhou Provincial,Guiyang 550025 |
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Abstract By changing the aspect ratio of the circular steel tube concrete short column and the amount of expansion agent used, the concrete expansion agent usage was 0%, 4%, 6%, 8%, and the diameter of the circular steel pipe was 200 mm, 250 mm, and 10 test members were fabricated. It is divided into two groups, A and B. The axial compression test was carried out on the test components, and the failure mode was observed. The stress-strain curves and ultimate bearing capacity of different width-thickness ratios and expansion agent dosages were obtained. The results showed that compared with the ordinary round concrete-filled steel tubular columns, the maximum bearing capacity of the axial compression of Group A was increased by 46.88%, 35.56% and 13.73%, respectively, and that of Group B was increased by 53.13%, 41.58% and 20.08%, respectively. The simulation results of ABAQUS nonlinear finite element software were used, and the experimental results were basically the same as the simulated values. Therefore, when the amount of expansion agent used in concrete was 4%, the maximum bearing capacity of the circular steel tubular concrete column was maximized and the performance was optimal.
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Published: 25 November 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China Youth (11602061),Guizhou Province Science and Technology Plan Fund Project ([2018]2816). |
About author:: Xindong Ding is a master’s degree student at Guizhou University. His major is architecture and civil enginee-ring. His research direction is structural engineering.
Xinming Cao is a professor at Guizhou University, a master’s tutor, and a member of the American Concrete Institute. Now he is engaged in the study of constrained concrete structure teaching and vocational education methods. In the past five years, he has presided over three vertical research projects, including one at the national level and two at the department level; he has presided over three horizontal research projects. He has published more than 30 academic papers and authorized more than 20 national invention patents and utility model patents.
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