Rotation Capacity of I-Shaped Beams under Alternating Axial Forces Based on Buckling-Mode Transitions

研究成果: Article査読

2 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号04020089
ジャーナルJournal of Structural Engineering (United States)
146
6
DOI
出版ステータスPublished - 2020 6 1

ASJC Scopus subject areas

  • 土木構造工学
  • 建築および建設
  • 材料科学(全般)
  • 材料力学
  • 機械工学

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