Redistribution effects in linear elastic analyses of continuous composite steel-concrete beams according to Eurocode 4

Abstract

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.Za analizu spregnutih kontinualnih nosaca od celika i betona postoje razlicite analiticke metode, razlicitog stepena tacnosti. Evrokod 4 dozvoljava i preporucuje nekoliko jednostavnih metoda kojima se u proracun uvode nelinearni efekti kao sto su skupljanje i tecenje betona, ispicalost betonske ploce i shear-lag efekat, i one su objasnjene u radu. Kroz numericku analizu cetiri spregnuta kontinualna nosaca ove metode su uporedjene i date su prakticne preporuke za analizu ove grupe nosaca.