Prediction of Basic Creep of Concrete—Semi-Empirical Model Based on Adaptive Link Mechanism

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Title: Prediction of Basic Creep of Concrete—Semi-Empirical Model Based on Adaptive Link Mechanism

Author(s): Shatabdi Mallick, M. B. Anoop, and K. Balaji Rao

Publication: Materials Journal

Volume: 114

Issue: 01

Appears on pages(s): 29-39

Keywords: adaptive link mechanism; basic creep; creep compliance; modeling error

Date: 1/1/2017

Abstract:
Creep of concrete affects the safety and serviceability of reinforced and prestressed concrete structures and structural elements. In the present study, a semi-empirical model is proposed for predicting basic creep compliance of concrete, which is based on the concept of adaptive link mechanism. The creep behavior of concrete is described by means of formation, breakage, and reformation of two types of links: Type I and Type II. The model is formulated as a function of evolution of these links with time. The coefficients associated with the model are determined through regression analysis of results of experimental investigations reported by various investigators. The predictions made using the model are found to be better than those of the fib MC2010 model and B3 model. The model predictions are also compared with the experimental data, which are not used in the regression analysis. Results obtained from the comparative study are satisfactory, indicating that the proposed model can be used for predicting the basic creep compliance of concrete for any concrete mixture proportion within the parameter range considered.