Abstract:
The concrete creep prediction is related to the reasonable determination of the long-term performance of a structure. At present, a variety of concrete creep prediction models have been developed. In order to facilitate design and research, the influencing factors of various calculation models are analyzed and summarized. Based on the experimental measurements and reference results, the applicability of various prediction models for high strength concrete creep and early age concrete compression/tensile creep is evaluated. The results showed that:JTG D62 2012 and GL 2000 model is more suitable for high strength concrete. GL 2000 model is suitable for early age concrete compressive/tensile creep, but the compression creep error exceeds 26.4%, the tensile creep error is greater than 46.1%, and the error of the other prediction models are not acceptable. Therefore, the existing creep model of concrete is not suitable for early age concrete tension and compression creep prediction. For the analysis of an early age structure, the creep model which reflects the tensile/compression creep characteristics of early age concrete structures is needed.