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Computers and Concrete Volume 13, Number 5, May 2014 , pages 587-601 DOI: https://doi.org/10.12989/cac.2014.13.5.587 |
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Modeling of post-tensioned one-way and two-way slabs with unbonded tendons |
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Uksun Kim, Yu Huang, Pinaki R. Chakrabarti and Thomas H.-K. Kang
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| Abstract | ||
| A sophisticated finite element modeling approach is proposed to simulate unbonded post-tensioned concrete slabs. Particularly, finite element contact formulation was employed to simulate the sliding behavior of unbonded tendons. The contact formulation along with other discretizing schemes was selected to assemble the post-tensioned concrete system. Three previously tested unbonded post-tensioned two-way and one-way slabs with different reinforcement configurations and boundary conditions were modeled. Numerical results were compared against experimental data in terms of global pressure-deflection relationship, stiffness degradation, cracking pattern, and stress variation in unbonded tendons. All comparisons indicate a very good agreement between the simulations and experiments. The exercise of model validation showcased the robustness and reliability of the proposed modeling approach applied to numerical simulation of post-tensioned concrete slabs. | ||
| Key Words | ||
| post-tensioning; prestressed concrete; two-way slabs; finite element; numerical model | ||
| Address | ||
| Uksun Kim and Pinaki R. Chakrabarti: Department of Civil Engineering, California State University at Fullerton, 800 N. State College Blvd., Fullerton, CA 92834, U.S.A. Yu Huang: School of Civil Engineering and Environmental Science, The University of Oklahoma, 202 W. Boyd St. Rm 334, Norman, OK 73019, U.S.A. Thomas H.-K. Kang: Department of Architecture & Architectural Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul151-744, Republic of Korea | ||