Građevinar, Vol. 53 No. 09., 2001.
Prethodno priopćenje
Stress transfer due to creep of concrete on composite bridges
Dragutin Horvatić
Darija Živni
Sažetak
The issue of a more accurate calculation of stress transfer induced by creep of concrete was raised during conversion of the European prestandard for bridges ENV-1994-2 into the European standard (EN). For smaller spans of composite bridges the proportion of concrete is relatively higher, so that the influence of creep on girder is also higher. In a more accurate analysis the coefficient of creep φ should be corrected using factors ΨA,L and ΨI,L. The genesis of creep multipliers Ψ is presented and the differences which, according to allowable approximation, are not always on the side of safety, are illustrated by an example.
Ključne riječi
creep of concrete; effective modulus; ratio nL; creep multiplier Ψ; relaxation coefficients; stress changes
Hrčak ID:
12089
URI
Datum izdavanja:
15.10.2001.
Posjeta: 1.310 *