Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fatigue damage investigation on diaphragm cutout detail on orthotropic bridge deck based on field measurement and FEM
Abstract 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.
Highlights Many fatigue cracks were found on the diaphragm near the cutout detail. The causes of fatigue damage at the diaphragm cutout were investigated. The cutout detail is under biaxial compression, and exists in high stress raiser. The cutout detail suffers serious out-of-plane distortion. The diaphragm thickness should not be less than 14 mm for infinite fatigue life.
Fatigue damage investigation on diaphragm cutout detail on orthotropic bridge deck based on field measurement and FEM
Abstract 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.
Highlights Many fatigue cracks were found on the diaphragm near the cutout detail. The causes of fatigue damage at the diaphragm cutout were investigated. The cutout detail is under biaxial compression, and exists in high stress raiser. The cutout detail suffers serious out-of-plane distortion. The diaphragm thickness should not be less than 14 mm for infinite fatigue life.
Fatigue damage investigation on diaphragm cutout detail on orthotropic bridge deck based on field measurement and FEM
Zhu, Zhiwen (Autor:in) / Xiang, Ze (Autor:in) / Li, Jianpeng (Autor:in) / Carpinteri, Alberto (Autor:in)
Thin-Walled Structures ; 157
02.09.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Investigation on fatigue cracks of diaphragm cutout in bridge orthotropic steel deck
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