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Plasting buckling of frame supports

Izvijanje okvirnih nosača u plastičnoj oblasti

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2010
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Authors
Ćorić, Stanko
Article (Published version)
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Abstract
This paper presents plastic buckling analysis of steel frames. Sway and non-sway frames were considered. It was shown that by applying the matrix analysis according to second order theory, critical load of the whole system and the effective buckling length of each frame column can be found. Numerical analysis was performed using the self-developed computer program based on the exact solution and transcendental shape functions were applied. The calculation was also carried out according to actual domestic and European codes. Comparative numerical analysis presented herein shows what kind of error can be obtained using the actual codes in the part which is related to effective length calculation of steel frames that buckle in plastic domain.
U ovom radu prikazana je analiza izvijanja okvirnih čeličnih nosača u plastičnoj oblasti. Analizirani su nosači sa pomerljivim i nepomerljivim čvorovima. Pokazano je kako se primenom matrične analize po teoriji drugog reda može odrediti kritično opterećenje okvirnih sistema, a zatim i dužine izvijanja pojedinih štapova. Numerička analiza je obavljena pomoću sopstvenog programa koji se bazira na tačnom rešenju, pa su interpolacione funkcije usvojene u transcendetnom obliku. Takođe, proračun je sproveden i prema aktuelnim domaćim i evropskim propisima. Na kraju je izvršeno upoređivanje rezultata koji su dobijeni ovim postupcima i zaključeno je kolike greške mogu da se naprave primenom aktuelnih propisa u delu koji se odnosi na proračune dužine izvijanja stubova okvirnih čeličnih nosača koji se izvijaju u plastičnoj oblasti.
Keywords:
effective buckling length / frame structures / plastic domain / dužina izvijanja / okvirni nosači / plastična oblast
Source:
Nauka + Praksa, 2010, 13, 9-12
Publisher:
  • Univerzitet u Nišu - Građevinsko-arhitektonski fakultet, Niš

ISSN: 1451-8341

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URI
http://grafar.grf.bg.ac.rs/handle/123456789/299
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  • Radovi istraživača / Researcher's publications
  • Катедра за техничку механику и теорију конструкција
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