### Abstract

Lateral-torsional buckling moment resistances of I-shaped stepped beams with continuous lateral top-flange bracing were investigated. Stepped beam factors and moment gradient correction factors were used to develop new lateral buckling formula for beam designs. From the investigation of finite element analysis, new lateral buckling formula of beams with singly or doubly stepped member changes and with continuous lateral top-flange bracing subjected to general loading were developed. The new design equation includes the length-to-height ratio factor to account for the increase of lateral-torsional buckling moment resistance as the increase of length-to-height ratio of stepped beams. The calculation examples for obtaining lateral-torsional buckling moment resistance using the new design equation indicate that engineers should easily determine the buckling capacity of the stepped beam.

Original language | English |
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Title of host publication | Proceedings of the International Colloquium on Stability and Ductility of Steel Structures, SDSS 2006 |

Pages | 315-322 |

Number of pages | 8 |

Publication status | Published - 2006 Dec 1 |

Event | International Colloquium on Stability and Ductility of Steel Structures, SDSS 2006 - Lisbon, Portugal Duration: 2006 Sep 6 → 2006 Sep 8 |

### Other

Other | International Colloquium on Stability and Ductility of Steel Structures, SDSS 2006 |
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Country | Portugal |

City | Lisbon |

Period | 06/9/6 → 06/9/8 |

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### Keywords

- Beam design
- Buckling
- Stability
- Stepped beam

### ASJC Scopus subject areas

- Civil and Structural Engineering
- Safety, Risk, Reliability and Quality
- Building and Construction

### Cite this

*Proceedings of the International Colloquium on Stability and Ductility of Steel Structures, SDSS 2006*(pp. 315-322)