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2013, vol. 11, br. 1, str. 107-112
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Ponašanje armirano betonskih nosača opterećenih poprečnim silama na savijanje
Behavior of reinforced concrete beams loaded by transversal bending forces
Univerzitet u Prištini sa privremenim sedištem u Kosovskoj Mitrovici, Fakultet tehničkih nauka, Srbija
e-adresa: vladar2@sbb.rs
Keywords: beam; active and resistance force; strain
Sažetak
Na osnovu eksperimentalnih istraživanja sa nosačima MB 25 i MB 80 na kratkotrajno i dugotrajno opterećenje, ne može se potvrditi pretpostavka da se teorija rešetke bazira na stvarnom ponašanju armiranobetonskih nosača napregnutih na savijanje do sloma, jer u zategnutoj zoni nosača nije moguće formiranje zategnutog štapa rešetke, pa je potrebno kod ispitivanja uslova ravnoteže uzeti u obzir aktivne sile pritiska i zatezanja kao i otporne sile pritiska, zatezanja i smicanja.
Abstract
Based on the experimental research on the beams MB 25 and MB 80 to short term load and long term load, the assumption that the truss theory is based on the actual behavior of reinforced concrete beams loaded by bending until failure cannot be confirmed, because in the tensioned zone of the beam, the tensioned member of the truss cannot be formed, so it is necessary to take into consideration the active forces of pressure and tension, as well as the resistance forces of pressure, tension and shearing when the equilibrium conditions are examined.
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Reference
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