Prediction accuracy of fatigue-relevant load effects in an orthotropic deck

• Published in: Journal of constructional steel research 2024-03, Vol.214, p.108459, Article 108459
• Main Authors: Maljaars, Johan, Verdenius, Stefan, Burggraaf, Henco, van Es, Sjors
• Format: Article
• Language: English
• Subjects: Asphalt influence; Fatigue; Field tests; Model uncertainty; Orthotropic bridge deck
• ISSN: 0143-974X; 1873-5983
• DOI: 10.1016/j.jcsr.2024.108459

The accuracy of stress estimates in Orthotropic Bridge Decks (OBD) may be negatively impacted by the complex load transfer and asphalt properties. Yet, accurate stress estimates are crucial for optimal fatigue verifications. A field measurement and modelling study has been conducted to evaluate the accuracy of finite element (FE) models. The level of detail of the FE model resembled engineering practice. Measurements comprised of strains caused by normal flowing traffic and by single vehicles with known load. The study gave insight into the distribution of the transverse vehicle location, dynamic vehicle–bridge deck interaction, and the asphalt influence. Comparing with international guidelines, the prediction error of FE models of OBDs is on the edge of acceptable. •Vehicle-induced strains are measured in an Orthotropic Bridge Deck (OBD).•Single vehicle tests and flowing traffic measurements are performed.•Data give insight in distribution of transverse location and asphalt influence.•Dynamic amplification appears a random factor with limited effect on fatigue.•Prediction errors of finite element models of OBDs are on the edge of acceptable.