A filament beam-column model for the non-linear analysis of RC frames including the early age effects

Author(s): A.R. Marí, M.D. Crespo, C. Molins, J.M. Bairán and D. Ferreira
Paper category: conference
Book title: Crack Control of Mass Concrete and Related Issues concerning Early-Age of Concrete Structures
Editor(s): F. Toutlemonde and J.-M. Torrenti
Print ISBN: 978-2-35158-125-4
e-ISBN: 978-2-35158-126-1
Publisher: RILEM Publications SARL
Publication year: 2012
Pages: 201 - 210
Total Pages: 10
Language: English

Abstract: A fiber beam model able to reproduce the strain and stress state of tridimensional reinforced and prestressed concrete frame structures since early ages is presented. The model is based on the Finite Element Method accordingly to the Timoshenko beam theory. The cross-section is discretized into concrete fibers and longitudinal steel filaments, allowing the consideration of different levels of maturity for each fiber. Transversal steel is considered smeared in the concrete fibers. Strains, in each instant of time, are given by the summation of different sources, such as, thermal strains, shrinkage, creep and aging. In this paper two application examples are shown: i) the study of the early age behavior of concrete elements with total external restraint and ii) the numerical simulation of the temperature and strain/stress development in a large beam specimen loaded in bending after free shrinkage.

Online publication: 2012-07-20
Publication Type: full_text
Public price (Euros): 0.00