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Rotation Capacity of 1-Shaped Beams under Alternating Axial Forces Based on Buckling-Mode Transitions
| 题名： | Rotation Capacity of 1-Shaped Beams under Alternating Axial Forces Based on Buckling-Mode Transitions |
| 正文语种： | 英文 |
| 作者： | Atsushi Suzuki; Yoshihiro Kimura;Kazuhiko Kasai |
| 作者单位： | Premium Industrial and Engineering LLC;Tohoku Univ |
| 关键词： | Braced structures; I-beam; Local buckling; Rotation capacity; Web-shear buckling |
| 摘要： | During earthquakes, I-shaped beams (I-beams) in a braced structure are subjected to the flexural moment synchronized with reversed axial forces transmitted from buckling restrained braces. A prior study used the modified width-thickness ratio to evaluate the rotation capacity of I-beams that failed by local buckling under alternating axial force. Generally speaking, I-beams in braced frames are designed with larger sections to resist severe stress conditions. The buckling mode might thereby be switched to web-shear buckling, leading to inaccurate estimation of the rotation capacity when using existing equations. For this study, a classification index of buckling mode is constructed considering axial force and plate interactions. Moreover, a novel index and formulas are proposed for evaluating the rotation capacity of I-beams under alternating axial forces, including buckling-mode transition effects. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.06 |
| 页码： | 04020089 |
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