Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fatigue crack-propagation law of diaphragm-to-rib welded joint in steel bridge deck
Abstract The crack-growth characteristics at different lengths are diverse, while blind maintenance for cracks cannot achieve satisfactory arresting effect. By carrying out numerical simulation and fatigue tests of diaphragm-to-rib welded joint (DU) specimens, the crack-growth rates, morphology and stress state at the crack tip were explored. The crack-growth process was segmented and reasonable maintenance occasions for DU cracks were proposed. The result shows that the oblique DU crack is affected by in-plane shear under out-of-plane deformation of diaphragm, driving the crack to grow to the horizontal. The DU crack presents the three-stage characteristics of fast-slow-rapid growth with the approximate demarcations of 8 mm and 40 mm. It is recommended to carry out maintenance in the first two stages to avoid entering the third rapid-growth stage. Combined with the applicability of maintenance technologies, classified maintenance methods of ICR, drilling and bolt reinforcement were proposed for cracks in three stages, respectively.
Graphical abstract Display Omitted
Highlights Explore the reason for crack turning under out-of-plane deformation of diaphragm. Propose three-stage growth characteristic and its demarcations of diaphragm cracks. Suggest the reasonable maintenance occasion for diaphragm cracks. Provide classified maintenance methods for diaphragm cracks of different lengths.
Fatigue crack-propagation law of diaphragm-to-rib welded joint in steel bridge deck
Abstract The crack-growth characteristics at different lengths are diverse, while blind maintenance for cracks cannot achieve satisfactory arresting effect. By carrying out numerical simulation and fatigue tests of diaphragm-to-rib welded joint (DU) specimens, the crack-growth rates, morphology and stress state at the crack tip were explored. The crack-growth process was segmented and reasonable maintenance occasions for DU cracks were proposed. The result shows that the oblique DU crack is affected by in-plane shear under out-of-plane deformation of diaphragm, driving the crack to grow to the horizontal. The DU crack presents the three-stage characteristics of fast-slow-rapid growth with the approximate demarcations of 8 mm and 40 mm. It is recommended to carry out maintenance in the first two stages to avoid entering the third rapid-growth stage. Combined with the applicability of maintenance technologies, classified maintenance methods of ICR, drilling and bolt reinforcement were proposed for cracks in three stages, respectively.
Graphical abstract Display Omitted
Highlights Explore the reason for crack turning under out-of-plane deformation of diaphragm. Propose three-stage growth characteristic and its demarcations of diaphragm cracks. Suggest the reasonable maintenance occasion for diaphragm cracks. Provide classified maintenance methods for diaphragm cracks of different lengths.
Fatigue crack-propagation law of diaphragm-to-rib welded joint in steel bridge deck
Fang, Liang (Autor:in) / Fu, Zhongqiu (Autor:in) / Ji, Bohai (Autor:in) / Gao, Yuqiang (Autor:in)
01.05.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Fatigue Strength and Root-Deck Crack Propagation for U-Rib to Deck Welded Joint in Steel Box Girder
| Online Contents | 2018
Fatigue Strength and Root-Deck Crack Propagation for U-Rib to Deck Welded Joint in Steel Box Girder
| Springer Verlag | 2018
Fatigue Evaluation of Rib-to-Deck Welded Joints of Orthotropic Steel Bridge Deck
| British Library Online Contents | 2011
Fatigue Evaluation of Rib-to-Deck Welded Joints of Orthotropic Steel Bridge Deck
| Online Contents | 2011