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Structural Engineering and Mechanics Volume 37, Number 5, March10 2011 , pages 459-473 DOI: https://doi.org/10.12989/sem.2011.37.5.459 |
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Finite element analysis of concrete cracking at early age |
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Mauren Aurich, Americo Campos Filho, Tulio Nogueira Bittencourt and Surendra P. Shah
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| Abstract | ||
| The study of the early age concrete properties is becoming more important, as the thermal effects and the shrinkage, even in the first hours, could generate cracks, increasing the permeability of the structure and being able to induce problems of durability and functionality in the same ones. The detailed study of the stresses development during the construction process can be decisive to keep low the cracking levels. In this work a computational model, based on the finite element method, was implemented to simulate the early age concrete behavior and, specially, the evaluation of the cracking risk. The finite element analysis encloses the computational modeling of the following phenomena: chemical, thermal, moisture diffusion and mechanical which occur at the first days after the concrete cast. The developed software results were compared with experimental values found in the literature, demonstrating an excellent approach for all the implemented analysis. | ||
| Key Words | ||
| concrete; early age; thermal analysis; moisture transport; mechanical analysis. | ||
| Address | ||
| Mauren Aurich: Department of Civil Engineering, Pontifical Catholic University of Rio Grande do Sul, Brazil Americo Campos Filho: Department of Civil Engineering, Federal University of Rio Grande do Sul, Brazil Tulio Nogueira Bittencourt: Polytechnical School, University of Sao Paulo, Brazil Surendra P. Shah: Department of Civil Engineering, Northwestern University, Evanston, IL, USA | ||