Cristin-resultat-ID: 1744218
Sist endret: 5. januar 2021, 15:59
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

New and extended design moment formulations for slender columns in frames with sway

Bidragsytere:
  • Jostein Hellesland

Tidsskrift

Engineering structures
ISSN 0141-0296
e-ISSN 1873-7323
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Publisert online: 2019
Trykket: 2020
Volum: 203
Artikkelnummer: 109804
Open Access

Importkilder

Scopus-ID: 2-s2.0-85074339556

Klassifisering

Vitenskapsdisipliner

Teknologi

Emneord

Konstruksjonsmekanikk • Numerisk mekanikk • Faststoffmekanikk • Stabilitet av konstruksjoner

Beskrivelse Beskrivelse

Tittel

New and extended design moment formulations for slender columns in frames with sway

Sammendrag

Present first-order based design code formulations for slender columns in frames with sway, employ sway magnification factors (for global second-order effects) also as moment magnifiers for the individual columns of the frame (storey). This approach ignores differences in magnification of individual column moments caused by local second-order effects in the columns. This difference can be significant. Better understanding of this aspect will strengthen approximate first-order based elastic methods, for which the important superposition principle is valid. Towards this end, local second-order effects are considered for shears, end moments and maximum mo- ments, applicable over the full range of axial loads. Specifically, end moment and maximum moment expressions of columns with sway are derived. These represent novel contributions that are suitable in typical design code formats, and in practical design work. They will allow more rational column assessments, and will allow more economical designs than present structural code procedures. Proposals are verified by comparison with results from second-order in-plane elastic analyses of single restrained columns and columns in frame panels. Also, extensions to the general case of load combinations that include both gravity and sideways loading are briefly presented.

Bidragsytere

Jostein Hellesland

  • Tilknyttet:
    Forfatter
    ved Matematisk institutt ved Universitetet i Oslo
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