Deck Casting Methods for Long-Span Railway Steel Truss-Concrete Composite Continuous Beam Bridges

DOI

10.2991/978-94-6463-726-7_72How to use a DOI?

Keywords

Large-span railway bridge; Truss-Concrete Composite Continuous Beam Bridges; Bridge deck; Concrete casting construction

Abstract

Using a large-span railway bridge as an example, this paper focuses on a continuous beam structure that combines an upper-deck steel truss with a concrete composite. Due to its unique construction conditions, three different deck casting methods were established, varying in casting sequence and shear stud arrangement: one-time casting, staged casting, and a combination of precast and cast-in-place methods. Numerical simulations were conducted to analyze the stress performance of the bridge deck and substructure under different conditions during both the construction and completed bridge phases. The results show that the one-time casting method has the most unfavorable stress conditions and critical sections for maximum tensile stress in the bridge deck and upper chord compared to the other two methods. Both the staged casting method and the precast + cast-in-place method exhibit reduced deck stress after the second-stage load application, which is more beneficial for the long-term structural performance. In the construction phase, the staged casting method also results in lower compressive stress in the upper chord. While the staged casting method shows a higher maximum tensile stress in the upper chord compared to the precast + cast-in-place method, it has the lowest values for maximum compressive stress in the upper chord, and both maximum compressive and tensile stresses in the lower chord among the three methods. After construction, the deflection for the staged casting method is only -141.1 mm. Based on a comprehensive analysis, the staged casting method is recommended for deck construction.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Chang-zhen Li
AU  - Chi Ma
AU  - Tian-di Chen
AU  - Yongling Deng
AU  - Chang-jun Dong
PY  - 2025
DA  - 2025/06/13
TI  - Deck Casting Methods for Long-Span Railway Steel Truss-Concrete Composite Continuous Beam Bridges
BT  - Proceedings of the 2024 6th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2024)
PB  - Atlantis Press
SP  - 718
EP  - 725
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-726-7_72
DO  - 10.2991/978-94-6463-726-7_72
ID  - Li2025
ER  -