Preliminary communication

Stress transfer due to creep of concrete on composite bridges

Dragutin Horvatić
Darija Živni

Abstract

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.

Keywords

creep of concrete; effective modulus; ratio nL; creep multiplier Ψ; relaxation coefficients; stress changes

Hrčak ID:

12089

URI

https://hrcak.srce.hr/12089

Publication date:

15.10.2001.

Article data in other languages: croatian

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