Vol.9, No 1, 2011 pp. 133 - 145
UDC
624.012.46.042/.044=111
DOI: 10.2298/FUACE1101133K
REDISTRIBUTION EFFECTS IN LINEAR ELASTIC ANALYSES OF CONTINUOUS COMPOSITE STEEL-CONCRETE BEAMS ACCORDING TO EUROCODE 4
Svetlana M. Kostić, Biljana Deretić-Stojanović, Saša Stošić
Faculty of Civil Engineering, University of Belgrade, Serbia
Different analytical methods, with different levels of approximations and accuracy, are available for analysis of continuous composite steel-concrete beams. The Eurocode 4 recommends few simple methods for calculation of creep, shrinkage, cracking of concrete and shear lag effects that are explained in the paper. Through the numerical examples of four continuous composite steel-concrete beams, the proposed methods of analyses are evaluated and compared. Practical recommendations for analysis of this type of girders are formulated.
Key words:
composite structures, creep, shrinkage, cracking of concrete, shear-lag.
REDISTRIBUCIJA UTICAJA U LINEARNO ELASTIČNOJ ANALIZI SPREGNUTIH KONTINUALNIH NOSAČA OD ČELIKA I BETONA PREMA EVROKODU 4
Za analizu spregnutih kontinualnih nosača od čelika i betona postoje različite analitičke metode, različitog stepena tačnosti. Evrokod 4 dozvoljava i preporučuje nekoliko jednostavnih metoda kojima se u proračun uvode nelinearni efekti kao što su skupljanje i tečenje betona, ispicalost betonske ploče i shear-lag efekat, i one su objašnjene u radu. Kroz numeričku analizu četiri spregnuta kontinualna nosača ove metode su upoređene i date su praktične preporuke za analizu ove grupe nosača.
Ključne reči:
spregnute konstrukcije, tečenje, skupljanje, ispucalost betona, shear-lag
