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Šćulac, Paulo; Milić-Toljušić, Dominika
Zbornik radova (Građevinski fakultet Sveučilišta u Rijeci), 12/2022, Volume: 25, Issue: 1Journal Article, Web Resource
U radu je prikazana analiza nosivosti zidanog polukružnog luka za opterećenjevertikalnom koncentriranom silom u četvrtini raspona. Proračun zidanih lučnihkonstrukcija svodi se na problem geometrije, dok je provjera čvrstoće od sporednogznačenja. Ukoliko je moguće pronaći potpornu liniju koja se nalazi unutar geometrijeluka u ravnoteži s vanjskim opterećenjem, tada je luk stabilan. Principom virtualnograda određena je granična vrijednost sile pri kojoj dolazi do gubitka stabilnosti.Rezultati su zatim uspoređeni s rezultatima dobivenim eksperimentalno na drvenommodelu luka, gdje je opterećenje postepeno povećavano sve do rušenja luka. This paper presents the structural analysis of a masonry semicircular arch loadedwith a point force at quarter span. The analysis of masonry arch structures is basedon the arch geometry instead on its strength. The arch is stable if a thrust line inequilibrium with the external load can be found within the arch geometry. Using theprinciple of virtual work the limit force at which the arch collapses is determined.The results were finally compared with experimentally obtained results on a timberarch model, where the load was gradually increased until the arch collapsed.
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