Journal
THIN-WALLED STRUCTURES
Volume 157, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.tws.2020.107106
Keywords
Fatigue crack; Orthotropic bridge deck (OBD); Cutout detail; Field measurement; FEM
Categories
Funding
- National Natural Science Foundation of China [51878269]
- STU Scientific Research Foundation for Talents of China [NTF18014]
- Open Foundation of Key Laboratory of Structure and Wind Tunnel of Guangdong Higher Education Institutes of China [201903]
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Based on cracking inspection on an orthotropic steel bridge, stress behaviors and fatigue life at cutout detail are investigated through field measurement and multi-level FEM modelling. Research finds that fatigue cracks at cutout detail are highly related to wheel path. Biaxial compression at cutout detail implies high residual stress and it suffers severe out-of-plane distortion. Fatigue life can be evaluated based on category B with stress location 5 mm away from free edge of cutout. It is concluded that serious overweight trucks, significant stress concentration, too thin diaphragms, and poor finish condition jointly contribute to early cracking at cutout detail.
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