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Stub Column Behavior of Concrete-Filled Cold-Formed Steel Semi-Oval Sections
| 题名： | Stub Column Behavior of Concrete-Filled Cold-Formed Steel Semi-Oval Sections |
| 正文语种： | eng |
| 作者： | Yi, Shusheng;Chen, Man-Tai;Young, Ben |
| 作者单位： | Shanghai Jiao Tong Univ||Vanke Co Ltd||Univ Hong Kong;Shanghai Jiao Tong Univ||Shanghai Jiao Tong Univ;Hong Kong Polytech Univ |
| 关键词： | Concrete-filled steel tubular (CFST);Cold-formed steel;Semi-oval sections;Stub column;High strength concrete |
| 摘要： | This paper is an attempt to investigate the structural behavior of concrete-filled cold-formed steel stub columns with semi-oval cross sections via experimental and numerical studies. The test campaign included thirteen stub columns tests on four semi-oval sections infilled with both normal and high strength concrete. The details of test campaign and key observations are described and discussed. Validated against the test data obtained from this study, finite element model was developed to emulate the compressive behavior observed from tests and then used to derive more numerical data via parametric analyses. It is worth noting that the current codified design provisions for concrete-filled steel tubular columns do not explicitly include the semi-oval sections investigated herein. The acquired results from the test campaign and numerical analyses were employed to evaluate the applicability of the American Specifications (ANSI/AISC 360 and ACI318) as well as the European Code (EN1994-1-1). The evaluation results indicate that the aforementioned design rules are generally conservative for compressive strength predictions, among which the predictions by the European Code are the most accurate. Design method considering strength enhancement and confinement effect was proposed with improved accuracy. It is suggested to use the proposed design method for the compressive design of concrete-filled cold-formed steel semi-oval stub columns. |
| 出版年： | 2023 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 149 |
| 期： | 3 |
| 页码： | 04023001.1-04023001.14 |
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