%0 Journal Article
%T Validation of international concrete creep prediction models by application to South African concretes
%A G C Fanourakis
%J Journal of the South African Institution of Civil Engineering
%D 2011
%I South African Institution of Civil Engineering
%X Creep deformation of concrete is often responsible for excessive deflections at service loads which can compromise the performance of a structure. National design codes therefore provide prediction models for the estimation of creep deformation. These models are empirical-based. This paper assesses the accuracy of six international code type models, when compared with the actual strains measured on a range of South African concretes under laboratory control conditions. The models considered are those contained in AS 3600 (2001), AS 3600 (2009), Eurocode EC 2 (2004), GL (2000), GL (2004) and GZ (1993). The results indicate that for the range of concretes tested, the GL (2000) model yielded the most accurate predictions, giving the lowest overall coefficient of variation (¦Øall) of 31,9%. The least accurate method was the AS 3600 (2009) which yielded an overall coefficient of variation (¦Øall) of 74,7%. This paper also recommends a new approach to assessing the accuracy of creep models.
%K concrete
%K creep
%K models
%K design codes
%K testing
%U http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-20192011000200004