Thermo-Hygral Model for of Shrinkage Induced Stresses in Concrete Structures

M.H. Baluch; Isam A. Mahmoud; M. Kalimur Rahman

doi:10.4028/www.scientific.net/KEM.400-402.929

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 400-402Thermo-Hygral Model for of Shrinkage Induced...

Thermo-Hygral Model for of Shrinkage Induced Stresses in Concrete Structures

Abstract:

Rapid moisture loss in concrete and the coupled shrinkage strain in concrete elements cause distress in structural members at early ages. The shrinkage stresses and the associated cracks can be reduced by controlling the rate of the moisture loss. However, under some circumstances, controlling the rate of the moisture rate is not practically possible which may add additional cost to the concrete construction. A finite element based technique is suggested in this paper to predict the shrinkage stresses and consequently predict the possibility of having shrinkage cracks. The technique utilizes the analog between the heat transfer and moisture diffusion, thermal stresses and shrinkage stresses. The analysis was performed using thermal and structural modules in the commercial finite element software ANSYS. The process described in this work makes the determination of restrained shrinkage stresses in problems of concrete structures readily accessible to design, repair and construction engineers.

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Periodical:

Key Engineering Materials (Volumes 400-402)

Pages:

929-934

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.400-402.929

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Online since:

October 2008

Authors:

M.H. Baluch, Isam A. Mahmoud, M. Kalimur Rahman

Keywords:

ANSYS, Finite Element Analysis (FEA), Heat Transfer, Shrinkage, Thermal Stress

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References

[1] Baluch, M.H., Rahman, M.K., Al-Gadhib, A.H. and Raza, A., Coefficient of Moisture Contraction - A New Concrete Material Parameter, Proceedings of Sustainable Construction Materials, Coventry University, UK, June 2007, pp.457-460.

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[2] Mohammed H. Baluch, M. Kalimur Rahman, Naeem S. Saleem and Isam A. Mahmoud. Shrinkage-Induced Stresses in Concrete Using a New Concrete Material Parameter, Proceedings of International Conference on Advances in Cement Based Materials and Applications in Civil Infrastructure (ACBM-ACI), Lahore, Pakistan, December, 2007, p.411420.

DOI: 10.4028/www.scientific.net/kem.400-402.929

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[3] Baluch, M.H., Rahman, M.K., Al-Gadhib, A.H. and Raza, A., and S. Zafar. Crack Minimization Model for Hot Weather Concreting,. Arabian Journal for Science and Engineering. Volume 31. No. 1C, June 2006, pp.77-91.

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