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Simplified Finite-Element Analysis Method for Axial Compression Behavior of Rectangular Concrete Columns with Interlocking Multispiral Reinforcements
| 题名： | Simplified Finite-Element Analysis Method for Axial Compression Behavior of Rectangular Concrete Columns with Interlocking Multispiral Reinforcements |
| 正文语种： | 英文 |
| 作者： | Ping-Hsiung Wang, Ph.D.; Kuo-Chun Chang, M.ASCE; Samuel Yen-Liang Yin, M.ASCE; Jui-Chen Wang;Yu-Chen Ou, M.ASCE |
| 作者单位： | National Center for Research on Earthquake Engineering;National Taiwan Univ |
| 关键词： | Concrete column; Axial compression behavior; Confinement; Multispiral; Finite element. |
| 摘要： | This paper proposes a simplified finite-element analysis (FEA) method to analyze the axial compression behavior of rectangular concrete columns confined by interlocking multispiral reinforcements. The proposed method uses an elastic finite-element analysis to approximate the distribution and ultimate state of confining stress in each core concrete element, which is substituted into the Mander confined concrete model to obtain the integrated compressive curve of a column. Verification of the proposed method against the test results of four four-spiral and four five-spiral reinforcement columns showed good agreement. Parametric studies of the five-spiral reinforcement showed that for the same amount of transverse reinforcement, a column with a larger confined area, which closely depends on the radius ratio of the small to the large spirals (rs/rb), has better axial load-carrying capacity and confinement efficiency. To achieve economic confinement design, the volumetric ratio of large spirals to small spirals (p$/pb) to have the concurrent yielding of both large and small spirals was found to be around 1.0, 0.8. and 0.7 for rj rb = 1 /2, 1/3, and 1/4, respectively. |
| 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： | 04019176 |
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