Analysis of fatigue cracking of orthotropic steel decks using XFEM

Zeng, Yong; Yu, Qian; Tan, Yu-Jie; Jiang, Yuhang; Anbang, Gu

doi:10.1016/j.engfailanal.2022.106536

Cited by 19 publications

(10 citation statements)

References 17 publications

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“…They are high-incidence areas of fatigue cracks, with occurrence rates as high as one/three or more. They are the control parts of fatigue performance of orthotropic steel deck [ 19 ].…”

Section: Fatigue Cracking Analysis Of Osd Using Xfemmentioning

confidence: 99%

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

Zeng

et al. 2023

Materials

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Orthotropic steel deck (OSD) are widely used in steel bridges because of their many advantages, but the structures and stresses of OSD are complex and sensitive to fatigue. Based on the model test, the structural fatigue analysis of OSD is carried out by using the extended finite element method (XFEM) to understand and reveal the causes of fatigue detail cracks and the generation and propagation of fatigue cracks at the welding ends of diaphragms, U-ribs, and diaphragms, which are the main structural fatigue details of the deck. The results show that: the fatigue crack at the diaphragm opening is not caused by a single factor, but the horizontal relative displacement is the root-cause of the fatigue crack; the contribution of out-of-plane displacement to the fatigue crack is more significant than that of vertical displacement or in-plane stress, which often leads to the initiation and propagation of the fatigue crack; the crack-propagation direction is perpendicular to the contour of principal stress, and the crack propagates into the plate along the high-stress area in the horizontal direction, which is in accordance with the basic theory of crack propagation. The research methods can provide technical support for the design of similar structures.

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“…They are high-incidence areas of fatigue cracks, with occurrence rates as high as one/three or more. They are the control parts of fatigue performance of orthotropic steel deck [ 19 ].…”

Section: Fatigue Cracking Analysis Of Osd Using Xfemmentioning

confidence: 99%

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

Zeng

et al. 2023

Materials

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“…where j n is the vector of the outer normal, s Γ is the crack tip perimeter, and s Γ is shown in Figure 1. w is expressed as the strain energy density with the following expression [5,6]: w is expressed as the strain energy density with the following expression [5,6]:…”

Section: Calculation Of the Stress Intensity Factormentioning

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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“…e double deck adopts an orthotropic deck. e width of the upper orthotropic deck varies from 24 m to 37 m due to functional requirements [19][20][21][22][23][24][25][26][27]. e tower is shaped like a "Tissot shape" with a height of 182 m and is made of C50 concrete.…”

Section: Project Overview Of the Bridgementioning

confidence: 99%

Investigation on Seismic Response of Long‐Span Special Steel Truss Cable‐Stayed Bridge

Zeng

2022

Advances in Civil Engineering

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Due to the small self-weight of the steel truss cable-stayed bridge with a single tower and a single cable plane, the torsional stiffness and wind stability of the structure are reduced. The arrangement of the deck type makes the mechanical properties of the cable-stayed bridge more complicated while reducing the cost and increasing the aesthetics. The effects of structural parameter variations and traveling wave effects on the seismic response of this steel truss cable-stayed bridge with a single tower and a single cable plane were investigated by the nonlinear time-history analysis method and nonuniform seismic analysis method. The results show that the displacement of the floating system under seismic action is larger than the other three systems, but its internal force is significantly smaller than the other three systems. The spectral characteristics and the duration of ground shaking have a greater influence on the maximum bending moment values corresponding to the height of the cable tower and the maximum axial force values of the main girder bars corresponding to the length of the bridge under earthquake action. The effect of steel truss girder stiffness parameter variations on structural internal forces of bridges and the effect of traveling wave effects on structural displacements of bridges in specific apparent wave velocity intervals do not exist universally.

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Analysis of fatigue cracking of orthotropic steel decks using XFEM

Cited by 19 publications

References 17 publications

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

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

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

Investigation on Seismic Response of Long‐Span Special Steel Truss Cable‐Stayed Bridge

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