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Experimental and Numerical Investigations of S690 High-Strength Steel Welded I-Sections under Combined Compression and Bending
| 题名： | Experimental and Numerical Investigations of S690 High-Strength Steel Welded I-Sections under Combined Compression and Bending |
| 正文语种： | eng |
| 作者： | Sun, Yao;Liang, Yating;Zhao, Ou;Young, Ben |
| 作者单位： | Nanyang Technol Univ Sch Civil & Environm Engn Singapore 639798 Singapore;Univ Glasgow Sch Engn Glasgow G12 8QQ Lanark Scotland;Nanyang Technol Univ Sch Civil & Environm Engn Singapore 639798 Singapore;Hong Kong Polytech Univ Dept Civil & Environm Engn Hong Kong Peoples R China |
| 关键词： | Combined loading test;Design standard;Interaction euqation;Local buckling;Numerical modeling;Reliability analysis;S690 high-strength steel;Welded I-section |
| 摘要： | This paper presents a comprehensive experimental and numerical investigation into the cross-section behavior and resistances of S690 high-strength steel welded I-sections under combined compression and bending moment. First, a testing program was carried out and included initial local geometric imperfection measurements and ten major-axis and minor-axis combined loading tests. The testing program was followed by a numerical modeling program, where finite-element models were developed and validated against the test results and then used to perform parametric studies to generate further numerical data over a wide range of cross-section dimensions and loading combinations. On the basis of the test and numerical data, the codified interaction curves for S690 high-strength steel nonslender welded I-sections under combined loading, as used in Europe, Australia, and the US, were evaluated. The evaluation results revealed that (1) the European code yields accurate resistance predictions for S690 high-strength steel Classes 1 and 2 welded I-sections under both major-axis and minor-axis combined loading but underestimates the resistances for their Class 3 counterparts, (2) the Australian standard leads to a high level of conservatism for S690 high-strength steel nonslender welded I-sections under combined loading, and (3) the American specification can well predict the resistances for S690 high-strength steel nonslender welded I-sections under major-axis combined loading but results in conservative resistance predictions for those under minor-axis combined loading. The reliability of the codified interaction curves was also evaluated by means of statistical analyses. (C) 2021 American Society of Civil Engineers. |
| 出版年： | 2021 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 147 |
| 期： | 5 |
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