A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of distortion ratio on distortion-induced fatigue behavior of steel girder bridges
Abstract The physical fatigue test and a new proposed research methodology called the digital fatigue test are used to investigate distortion-induced fatigue performance at web gap regions in steel girder bridges. Digital fatigue test based on the extended finite element method can combine factors such as residual welding stress, initial defects, and fatigue action, to simulate the propagation of mixed-mode cracks. Physical and digital fatigue test results show fatigue strength decreases significantly with increasing distortion ratio, which is the ratio of the minimum and maximum distortion at web gaps. When distortion ratio and nominal stress ratio increased from 0.2 to 0.5, the fatigue strength of 60 mm horizontal gusset plate–vertical stiffener web gap and 40 mm vertical stiffener web gap decreases by 43% and 50%, respectively.
Graphical abstract Display Omitted
Highlights Physical and digital fatigue test results show fatigue strength decreases significantly with increasing distortion ratio. When distortion ratio increased from 0.2 to 0.5, fatigue strength of 60 mm horizontal gusset plate web gap decreased by 43%. Physical and digital fatigue tests reveal that distortion-induced fatigue cracks are mixed-mode cracks.
Influence of distortion ratio on distortion-induced fatigue behavior of steel girder bridges
Abstract The physical fatigue test and a new proposed research methodology called the digital fatigue test are used to investigate distortion-induced fatigue performance at web gap regions in steel girder bridges. Digital fatigue test based on the extended finite element method can combine factors such as residual welding stress, initial defects, and fatigue action, to simulate the propagation of mixed-mode cracks. Physical and digital fatigue test results show fatigue strength decreases significantly with increasing distortion ratio, which is the ratio of the minimum and maximum distortion at web gaps. When distortion ratio and nominal stress ratio increased from 0.2 to 0.5, the fatigue strength of 60 mm horizontal gusset plate–vertical stiffener web gap and 40 mm vertical stiffener web gap decreases by 43% and 50%, respectively.
Graphical abstract Display Omitted
Highlights Physical and digital fatigue test results show fatigue strength decreases significantly with increasing distortion ratio. When distortion ratio increased from 0.2 to 0.5, fatigue strength of 60 mm horizontal gusset plate web gap decreased by 43%. Physical and digital fatigue tests reveal that distortion-induced fatigue cracks are mixed-mode cracks.
Influence of distortion ratio on distortion-induced fatigue behavior of steel girder bridges
Wang, Chun-sheng (author) / Wang, Yu-zhu (author)
Thin-Walled Structures ; 188
2023-04-18
Article (Journal)
Electronic Resource
English
Girder Differential Deflection and Distortion-Induced Fatigue in Skewed Steel Bridges
| Online Contents | 2006
Distortion-induced fatigue cracking in steel bridges
| TIBKAT | 1991