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Structural Engineering and Mechanics Volume 64, Number 1, October10 2017 , pages 45-58 DOI: https://doi.org/10.12989/sem.2017.64.1.045 |
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The influence of convoy loading on the optimized topology of railway bridges |
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Arne Jansseune and Wouter De Corte
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| Abstract | ||
| This paper presents the application of topology optimization as a design tool for a steel railway bridge. The choice of a steel railway bridge is dictated by the particular situation that it is suitable for topology optimization design. On the one hand, the current manufacturing techniques for steel structures (additive manufacturing techniques not included) are highly appropriate for material optimization and weight reduction to improve the overall structural efficiency, improve production efficiency, and reduce costs. On the other hand, the design of a railway bridge, especially at higher speeds, is dominated by minimizing the deformations, this being the basic principle of compliance optimization. However, a classical strategy of topology optimization considers typically only one or a very limited number of load cases, while the design of a steel railway bridge is characterized by relatively concentrated convoy loads, which may be present or absent at any location of the structure. The paper demonstrates the applicability of considering multiple load configurations during topology optimization and proves that a different and better optimal layout is obtained than the one from the classical strategy. | ||
| Key Words | ||
| topology optimization; SIMP; steel railway bridge; multiple load cases | ||
| Address | ||
| Arne Jansseune and Wouter De Corte: Department of Structural Engineering, Research group Schoonmeersen, Faculty of Engineering and Architecture, Ghent University, Valentin Vaerwyckweg 1, 9000 Ghent, Belgium | ||