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Static inelastic analysis of steel frames with flexible connections

Statička nelinearna analiza čeličnih ramova sa fleksibilnim vezama

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2004
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Authors
Nefovska-Danilović, Marija
Sekulović, M.
Article (Published version)
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Abstract
The effects of connection flexibility and material yielding on the behavior of plane steel frames subjected to static (monotonic) loads are presented in this paper. Two types of material nonlinearities are considered: flexible nodal connections and material yielding, as well as geometric nonlinearity of the structure. To account for material yielding, a plastic hinge concept is adopted. A flexible connection is idealized by nonlinear rotational spring. Plastic hinge is also idealized by nonlinear rotational spring attached in series with the rotational spring that accounts for connection flexibility. The stiffness matrix for the beam with flexible connections and plastic hinges at its ends is obtained. To illustrate the validity and accuracy of the proposed numerical model, several examples have been conducted.
U ovom radu prikazan je uticaj fleksibilnosti čvornih veza čeličnih ramova i pojava tečenja materijala na ponašanje čeličnih ramova pri dejstvu statičkog (monotonog) opterećenja. Razmatrana su dva tipa materijalne nelinearnosti: fleksibilnost čvornih veza i tečenje materijala, kao i geometrijska nelinearnost strukture. Da bi se obuhvatio uticaj tečenja materijala, usvojen je koncept plastičnih zglobova. Nelinearno ponašanje čvornih veza modelirano je pomoću rotacione opruge na krajevima grednog elementa. Plastični zglobovi na krajevima grednog elementa modelirani su pomoću rotacionih opruga, koje su sa oprugama za modeliranje nelinearnih čvornih veza vezane redno. Za konačni element sa rotacionim oprugama na krajevima dobijena je matrica krutosti. Prikazani su primeri na kojima je ilustrovano ponašanje čeličnih ramova sa fleksibilnim vezama pri dejstvu statičkog opterećenja.
Keywords:
steel frame / flexible connections / plastic hinge / nonlinear analysis
Source:
Theoretical and Applied Mechanics, 2004, 31, 2, 101-134
Publisher:
  • Srpsko društvo za mehaniku, Beograd

DOI: 10.2298/TAM0402101N

ISSN: 1450-5584

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URI
http://grafar.grf.bg.ac.rs/handle/123456789/71
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  • Radovi istraživača / Researcher's publications
  • Катедра за техничку механику и теорију конструкција
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