Non-linear analysis of prestressed concrete t-beams

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Abstract

In the Netherlands many concrete bridges that were built in the sixties and seventies are still in service. One subset of these bridges consists of prestressed concrete T-beams with cast-in-between slabs, cross-beams and transverse prestressing. Upon (re)assessment, the strength of these bridges is often too low. However, for this type of bridge several mechanism, that could possibly contribute to a higher load bearing capacity, are usually not taken into account. One of these mechanism is compressive membrane action (CMA), in transverse direction, in the concrete deck slab. Another potential mechanism is arch action, in longitudinal direction, in the T-beam. To investigate these mechanism or the so called ‘system behaviour’, and the ultimate load capacity, a T-beam bridge from 1962 was tested in seven full size collapse tests. In four tests the deck was sawn in longitudinal direction so that it became possible to test the load capacity of the individual beams. The individual beam tests are analyzed using a 3D non-linear finite element model. In the experiments, the load was placed at two different positions from the support. It was found that the nonlinear analysis shows good agreement with the load placed at 2.25 m from the support. However, with the load at 4.00 m from the support, the non-linear analysis shows an overestimation of ∼15%. Ultimately, this research aims to improve the calculation methods for the existing T-beam bridges in the Netherlands.
Original languageEnglish
Title of host publicationAdvances in Engineering Materials, Structures and Systems
Subtitle of host publicationInnovations, Mechanics and Applications - Proceedings of the 7th International Conference on Structural Engineering, Mechanics and Computation, 2019
EditorsAlphose Zingoni
PublisherCRC Press / Balkema
Pages1360-1365
Number of pages6
ISBN (Print)9781138386969
DOIs
Publication statusPublished - 2019
Event7th International Conference on Structural Engineering, Mechanics and Computation, 2019 - Cape Town, South Africa
Duration: 2 Sep 20194 Sep 2019

Conference

Conference7th International Conference on Structural Engineering, Mechanics and Computation, 2019
CountrySouth Africa
CityCape Town
Period2/09/194/09/19

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  • Cite this

    Hendriks, M. A. N., Ensink, S. W. H., & van der Veen, C. (2019). Non-linear analysis of prestressed concrete t-beams. In A. Zingoni (Ed.), Advances in Engineering Materials, Structures and Systems: Innovations, Mechanics and Applications - Proceedings of the 7th International Conference on Structural Engineering, Mechanics and Computation, 2019 (pp. 1360-1365). CRC Press / Balkema. https://doi.org/10.1201/9780429426506-235