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Uncertainty and Track Stability: Analysis of Partial Safety Factors for High-Speed Railway Bridges
https://orcid.org/http://orcid.org/0000-0002-9586-3487
https://orcid.org/http://orcid.org/0000-0001-5699-4428
https://orcid.org/http://orcid.org/0000-0002-3283-3117
https://orcid.org/http://orcid.org/0000-0002-2375-7685
Short-span railway bridges subjected to high-speed traffic are structures where dynamic effects are mandatory. Additionally, the variability associated with materials and geometric characteristics introduces uncertainty to the safety assessment of railway traffic. This work discusses the current norm’s limit for vertical deck acceleration regarding the evaluation of stability on ballasted tracks, as stated on Annex A2 of EN1990. A probabilistic methodology to define a partial safety factor is presented, employing dynamic analyses and Monte Carlo simulations. The evaluation of a case study is presented for a single-span filler-beam bridge of the Portuguese Railways Network. The results allow the definition of deterministic design scenarios that are compared to the simulations’ outcome. Conclusions show consistent partial safety factors with the norm’s limit, contributing to further discussion of this factor.
Uncertainty and Track Stability: Analysis of Partial Safety Factors for High-Speed Railway Bridges
https://orcid.org/http://orcid.org/0000-0002-9586-3487
https://orcid.org/http://orcid.org/0000-0001-5699-4428
https://orcid.org/http://orcid.org/0000-0002-3283-3117
https://orcid.org/http://orcid.org/0000-0002-2375-7685
Short-span railway bridges subjected to high-speed traffic are structures where dynamic effects are mandatory. Additionally, the variability associated with materials and geometric characteristics introduces uncertainty to the safety assessment of railway traffic. This work discusses the current norm’s limit for vertical deck acceleration regarding the evaluation of stability on ballasted tracks, as stated on Annex A2 of EN1990. A probabilistic methodology to define a partial safety factor is presented, employing dynamic analyses and Monte Carlo simulations. The evaluation of a case study is presented for a single-span filler-beam bridge of the Portuguese Railways Network. The results allow the definition of deterministic design scenarios that are compared to the simulations’ outcome. Conclusions show consistent partial safety factors with the norm’s limit, contributing to further discussion of this factor.
Uncertainty and Track Stability: Analysis of Partial Safety Factors for High-Speed Railway Bridges
https://orcid.org/http://orcid.org/0000-0002-9586-3487
https://orcid.org/http://orcid.org/0000-0001-5699-4428
https://orcid.org/http://orcid.org/0000-0002-3283-3117
https://orcid.org/http://orcid.org/0000-0002-2375-7685
Short-span railway bridges subjected to high-speed traffic are structures where dynamic effects are mandatory. Additionally, the variability associated with materials and geometric characteristics introduces uncertainty to the safety assessment of railway traffic. This work discusses the current norm’s limit for vertical deck acceleration regarding the evaluation of stability on ballasted tracks, as stated on Annex A2 of EN1990. A probabilistic methodology to define a partial safety factor is presented, employing dynamic analyses and Monte Carlo simulations. The evaluation of a case study is presented for a single-span filler-beam bridge of the Portuguese Railways Network. The results allow the definition of deterministic design scenarios that are compared to the simulations’ outcome. Conclusions show consistent partial safety factors with the norm’s limit, contributing to further discussion of this factor.
Uncertainty and Track Stability: Analysis of Partial Safety Factors for High-Speed Railway Bridges
Lecture Notes in Civil Engineering
Pellegrino, Carlo (editor) / Faleschini, Flora (editor) / Zanini, Mariano Angelo (editor) / Matos, José C. (editor) / Casas, Joan R. (editor) / Strauss, Alfred (editor) / Ferreira, Gonçalo (author) / Montenegro, Pedro (author) / Henriques, António Abel (author) / Calçada, Rui (author)
International Conference of the European Association on Quality Control of Bridges and Structures ; 2021 ; Padua, Italy
Proceedings of the 1st Conference of the European Association on Quality Control of Bridges and Structures ; Chapter: 138 ; 1216-1225
2021-12-12
10 pages
Article/Chapter (Book)
Electronic Resource
English
High-speed railway bridges , Probabilistic analysis , Ballasted tracks , Acceleration limit in bridges , Eurocode Engineering , Building Construction and Design , Engineering Economics, Organization, Logistics, Marketing , Risk Management , Fire Science, Hazard Control, Building Safety , Building Materials
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