Comparison of creep models for early-age concrete
Xia Chengjun , Chen Zhaohui , Chen Ke , Chen Ke
DOI:
Received August 20, 2015,Revised , Accepted , Available online May 10, 2016
Volume ,2016,Pages 61-68
- Abstract
Based on creep relaxation properties of the early-age concrete and concrete creep experimental data of different proportions strengths and loading age conditions, we carried out a comparative study of models for predicting creep CEB-FIP model, Muller model, B3 model and the presented Burgers model. The results show that, the CEB-FIP model has the best adaptability; Muller model is good for the creep prediction of high strength concrete; and the B3 model, which is based on the solidification theory, overestimates the creep for early-age concrete and shows poor accuracy. The results of the comparative study verify the physical significance and experience data range of parameters, as well as the rationality and applicability of the presented Burgers model with variable coefficient and four parameters.