Abstract
The orthotropic steel deck (OSD) shows notable superiorities in bridge applications but is highly prone to fatigue cracking due to the use of massive welded connections, especially in the rib-to-deck (RD) connection. This study presents a risk-based approach to planning different management strategies for OSDs under fatigue, which is supported by the integrated fatigue assessment coupling test data, in-situ measurements and probabilistic simulations. RD connections are focused on since they account for the longest welding length, i.e., about 50 times the total bridge length. The probability-stress-life (P-S-N) curve is first derived for RD connections from fatigue test data. Meanwhile, a condition-based probabilistic model of vehicle loads is constructed using the site-measured data. The load model is then implemented with numerical simulations in a sampling-based manner to derive fatigue stress spectra of different fatigue-critical RD connections. Based on the derived P-S-N curve and stress spectra, the fatigue deterioration of RD connections is assessed in a probabilistic form. Moreover, the failure assessment diagram (FAD) is derived for OSDs considering the serviceability, in accordance with the estimation of associated consequences. Based on the probabilistic estimation, the risk assessment is carried out for the OSD by combining the probability of failure and associated consequences.
Original language | English |
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Title of host publication | Life-cycle of structures and infrastructure systems |
Subtitle of host publication | Proceedings of the eighth international symposium on life-cycle civil engineering (IALCCE 2023), 2-6 July, 2023, Politecnico Di Milano, Milan, Italy |
Editors | Fabio Biondini, Dan M. Frangopol |
Place of Publication | London |
Publisher | Taylor & Francis |
Pages | 1975-1982 |
Number of pages | 8 |
Edition | 1 |
ISBN (Electronic) | 9781003323020 |
DOIs | |
Publication status | E-pub ahead of print - 28 Jun 2023 |
Event | Eighth International Symposium on Life-Cycle Civil Engineering: IALCCE 2023 - Milan, Milan, Italy Duration: 2 Jul 2023 → 6 Jul 2023 https://ialcce2023.org/ |
Publication series
Name | Life-Cycle of Civil Engineering Systems |
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Publisher | Routledge |
ISSN (Electronic) | 2641-2195 |
Conference
Conference | Eighth International Symposium on Life-Cycle Civil Engineering |
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Abbreviated title | IALCCE 2023 |
Country/Territory | Italy |
City | Milan |
Period | 2/07/23 → 6/07/23 |
Internet address |
Bibliographical note
ACKNOWLEDGEMENTThe support by National Natural Science Foundation of China (52208182), Natural Science Foundation of Shenzhen (JCYJ20220531101010020) and Marie Sklodowska-Curie Actions (MSCA) Fellowship via URKI (EP/X022765/1) is acknowledged with thanks by the authors.