1. CALCULATION OF STATICALLY DETERMINATE AND INDERTERMINATE PORTAL FRAME
- Author
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Kuštra, Ivan, Matoković, Ado, Pezer, Danijela, and Vetma, Vladimir
- Subjects
sizing ,Castigliano's theorem ,portal frame ,internal forces - Abstract
U ovom radu izvršen je proračun tri različite varijante okvirnog nosača, pri čemu su dva statički određena, a jedan statički neodređen. Kod navedenih varijanti, dimenzije okvira su iste kao i vanjsko opterećenje, a razlika je u način oslanjanja nosača. U uvodnom dijelu radu kratko je opisano što je to okvirni nosač i koji se koordinatni sustav koristi prilikom određivanja reakcija u osloncima, a koji prilikom određivanja unutarnjih sila i momenata. U drugom poglavlju proveden je proračun unutarnjih sila za sve tri varijante te su nacrtani dijagrami unutarnjih sila i momenata. Dodatno je za izračun reakcija sila statički neodređenog nosača korišten Castiglianov teorem. U posljednjem poglavlju provedeno je dimenzioniranje nosača i odabir odgovarajućih profila te je dana usporedba između promatranih varijanti s obzirom na dobivene vrijednosti unutarnjih sila i odabrane profile., In this paper, the calculation of three different variants of the portal frame was performed, where two variants are statically determinate and one is statically indeterminate. In these variants, the dimensions of the frame are same as well as external loads, and the difference is in the way that portal frame is supported. In the introduction part, it is briefly described what portal frame is and which coordinate system is used when determining reactions in supports, and which when determining internal forces. In the second chapter, the calculation of the internal forces for all three variants was performed and diagrams of internal forces and moments are drawn. In the last part of the paper, the sizing of the portal frame and selection of the suitable profil es was performed and the comparison between variants was given with respect to the values of internal forces and selected profiles.
- Published
- 2021