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Experimental Behavior and Design of High-Strength Circular Concrete-Filled Steel Tube Short Columns
| 题名： | Experimental Behavior and Design of High-Strength Circular Concrete-Filled Steel Tube Short Columns |
| 正文语种： | 英文 |
| 作者： | Jiangang Wei; Xia Luo; Zhichao Lai, A.M.ASCE; Amit H. Varma, M.ASCE |
| 作者单位： | Fuzhou Univ;Purdue Univ |
| 关键词： | High-strength; Circular; Concrete-filled steel tube (CFST); Columns; Experimental tests. |
| 摘要： | This paper investigates the behavior of high-strength circular concrete-filled steel tube (CFST) short columns. An experimental database consisting of 87 tests conducted on high-strength circular CFST short columns was compiled, and gaps in the existing research were identified. A total of 20 tests were then conducted to address the gaps in the database. The test parameters were the diameter-to-thickness ratio of the steel tubes D/t, the yield stress of steel Fy, and the compressive strength of concrete f'c. The tests indicated that the strength of high-strength circular CFST short columns increases with increasing Fy and f'c. but decreases with increasing D/t. All tested high-strength circular CFST short columns had acceptable ductility. Four of the specimens did not have any strength degradation, while the other 16 specimens retained at least 70% of their strength at strains of 5%. Results from the tests conducted in this research were combined with those from the compiled database; the combined results were used to evaluate the applicability of current design equations for estimating the cross-sectional strength of high-strength circular CFST columns. The evaluations indicated that the Japanese code provides the most accurate estimation. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.01 |
| 页码： | 04019184 |
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