Open AccessStudy on the mechanical property of low magnesia ore high strength concrete-filled steel tubular columns
Author(s) -
Huaguo Gao,
Lingxin Zhang,
Shiping Xu,
Qingli Wang,
Shuqing Wen,
Yinbiao Wang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1904/1/012021
Subject(s) - structural engineering , eccentricity (behavior) , materials science , bearing capacity , deflection (physics) , load bearing , composite material , engineering , physics , optics , political science , law
The high strength low magnesia ore concrete-filled steel tubular (CFST) column under eccentric loading was studied in this paper. The experiment of seven groups of different eccentricity ratio was conducted, and the details of experiment and test methods were introduced. The experimental ultimate load of each test was compared with design loads from several domestic specifications, and the bearing capacity of specimen with different confinement index was simulated. The results of load-vertical deflection curves show that when the eccentricity is the same and the capacity is 12% higher than that of steel tube high-strength concrete eccentrically compressed short columns, the distribution of longitudinal strain along the section height of steel tube in the two types of short columns basically conforms to the assumption of flat section. According to the results of the research, it was suggested to adopt confinement index of 1.1-1.4 in the practical project with the same to the common high strengthen concrete, and the layout of small eccentric load should be used in the structural design so as to better utilize the mechanical properties of the materials.