Prediction of the delayed behavior of concrete structures

Author(s): A. Brahma
Paper category: Proceedings
Book title: Proceedings of the 2nd International RILEM/COST Conference on Early Age Cracking and Serviceability in Cement-based Materials and Structures Volume 2
Editor(s): Stéphanie Staquet and Dimitrios Aggelis
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 709-714
Total Pages: 6
Language : English

Abstract: Analysis of delayed deformations of concrete under sustained load shows that the creep has a leading role on delayed deformations of concrete structures.
Knowledge of the creep characteristics of concrete is a necessary starting point in the design of structures for crack control. Such knowledge will enable the designer to estimate the probable deformation in pre-stressed or reinforced concrete and the appropriate steps be taken in design to accommodate this movement.
In this study, we propose a prediction model that involves the acting principal parameters on the delayed behaviour of concrete structures.
For the estimation of the model parameters Levenberg-Marquardt method has proven very satisfactory. A confrontation between the experimental results and the predictions of model designed shows that it is well suited to describe the evolution of the creep of concrete structures. Furthermore, the proposed model is characterized by a better precision compared with the predictions of creep models recommended by the standards

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00

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