Numerical Simulation of Fatigue Cracking of Diaphragm Notch in Orthotropic Steel Deck Model

Zeng, Yong; He, Hong; Yu, Qian; Sun, Xudong; Tan, Hongmei; Zhou, Jianting

doi:10.3390/ma16020467

Cited by 22 publications

(12 citation statements)

References 13 publications

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“…At the same time, as the crack expands, the stress intensity factor at the middle point of the leading edge of the crack shows a trend of firstly increasing and then decreasing. The reason for this phenomenon may be the fact that the crack expansion in the length direction is based on the expansion fitting in the depth direction, which makes the expansion rate in both directions slightly different, which in turn may lead to an increase in the ratio of the long semi axis to the short semi axis in the expansion process, and the gradual flattening of the crack shape, which is no longer stable, also causes a change in the stress intensity factor at the mid-point of the leading edge of the crack [37][38][39]. The observation of the model test shows that the cracks are indeed very flat and long semi-elliptical in shape, which shows that the expansion of the fatigue cracks is objective and inevitably related to the special stress pattern of the OSD structure.…”

Section: Fatigue Cracking's Locationmentioning

confidence: 99%

Fatigue Life Evaluation of Orthotropic Steel Deck of Steel Bridges Using Experimental and Numerical Methods

et al. 2023

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Orthotropic steel deck (OSD) structures are widely used in the bridge deck system of rail transit bridges. Reducing the amplitude of the stress intensity factor is the most effective method to improve the fatigue life of OSD structures. In order to explore the fatigue crack propagation of the OSD structure and the factors affecting the amplitude of the structural stress intensity factor, linear elastic fracture mechanics and Paris’ law is used for theoretical support in this paper. Firstly, a cable-stayed bridge of urban rail transit is taken as the research object, a full-scale segment model of the OSD structure is designed and static and fatigue tests are carried out. Based on the test data, the fatigue life of the structure is simulated and predicted. Finally, ABAQUS and Franc3D are used to analyze the influence of parameters, such as U-rib thickness, roof thickness and diaphragm thickness, of the OSD structure on the amplitude of the stress intensity factor. The test and FEM analysis results show that the thickness of diaphragm and the height of the U-rib have little effect on the fatigue life of the OSD structure, appropriately increasing the thickness of the top plate and U-rib has a positive significance for prolonging the fatigue life of the structure. In addition, it is also of reference value to the application of sustainability and the science of sustainable development.

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Section: Fatigue Cracking's Locationmentioning

confidence: 99%

Fatigue Life Evaluation of Orthotropic Steel Deck of Steel Bridges Using Experimental and Numerical Methods

et al. 2023

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“…The local damage monitoring method uses advanced sensors, non-destructive testing and other means to directly diagnose the local damage status of the structure. By contrast, the overall damage identification method uses data mining of structural response information to indirectly extract the characterization index of the structural damage status [6][7][8][9][10][11][12]. As a large and complex civil structure, arch bridges have many key components, and the damage monitoring and identification methods of arch bridges are complicated.…”

Section: Introductionmentioning

confidence: 99%

A Review on Damage Monitoring and Identification Methods for Arch Bridges

et al. 2023

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The damage monitoring and identification of arch bridges provide an important means to ensure the safe operation of arch bridges. At present, many methods have been developed, and the applicability and effectiveness of these methods depend on the damage type, structural configuration and available data. To guide the practical application of these methods, a systematic review is implemented in this paper. Specifically, the damage monitoring and identification methods of arch bridges are divided into the damage monitoring of local diseases and damage identification of overall performance. Firstly, the research on the damage monitoring of the local diseases of arch bridges is reviewed. According to the disease type, it is divided into four categories, including suspender inspection, void monitoring, stress detection and corrosion detection. For each disease, this paper analyzes the principles, advantages and shortcomings of various methods. Then, the damage identification methods of the overall performance of arch bridges are reviewed, including masonry arch bridges, steel arch bridges, reinforced concrete arch bridges and concrete-filled steel tubular arch bridges. And the commonly used damage indexes of damage identification methods are summarized. This review aims to help researchers and practitioners in implementing existing damage detection methods effectively and developing more reliable and practical methods for arch bridges in the future.

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“…Orthotropic steel deck (OSD) is widely used in the construction of various bridges with the advantages of lightweight, low cost, and large bearing capacity [ 1 , 2 ]. However, fatigue cracks often appear on OSD due to welding residual stress and complex traffic load [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints

Zhao

Wang

et al. 2023

Materials

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This paper investigated the effect of repair welding on the microstructure, mechanical properties, and high cycle fatigue properties of S355J2 steel T-joints in orthotropic bridge decks. The test results found that the increase in grain size of the coarse, heat-affected zone decreased the hardness of the welded joint by about 30 HV. The tensile strength of the repair-welded joints was reduced by 20 MPa compared to the welded joints. For the high cycle fatigue behavior, the fatigue life of repair-welded joints is lower than that of the welded joints under the same dynamic load. The fracture positions of toe repair-welded joints were all at the weld root, while the fracture positions of the deck repair-welded joints were at the weld toe and weld root, with the same proportion. The fatigue life of toe repair-welded joints is reduced more than that of deck repair-welded joints. The traction structural stress method was used to analyze fatigue data of the welded and repair-welded joints, and the influence of angular misalignment on was considered. The fatigue data with and without AM are all within the ±95% confidence interval of the master S-N curve.

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Numerical Simulation of Fatigue Cracking of Diaphragm Notch in Orthotropic Steel Deck Model

Cited by 22 publications

References 13 publications

Fatigue Life Evaluation of Orthotropic Steel Deck of Steel Bridges Using Experimental and Numerical Methods

Fatigue Life Evaluation of Orthotropic Steel Deck of Steel Bridges Using Experimental and Numerical Methods

A Review on Damage Monitoring and Identification Methods for Arch Bridges

Influence of Repair Welding on the Fatigue Behavior of S355J2 T-Joints

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