scholarly journals COMPARISON OF REPAIR METHODS FOR FATIGUE CRACK INITIATED AT WELDED TOE BETWEEN STEEL DECK PLATE AND VERTICAL STIFFENER

2016 ◽  
Vol 72 (1) ◽  
pp. 192-205 ◽  
Author(s):  
Risa MATSUMOTO ◽  
Toshiyuki ISHIKAWA ◽  
Shigeaki TSUKAMOTO ◽  
Yuta AWAZU ◽  
Hirotaka KAWANO
Keyword(s):  
Fatigue Crack ◽  
Deck Plate ◽  
Vertical Stiffener ◽  
Steel Deck

Fatigue Crack Behavior at Rib-To-Deck Weld Bead in Orthotropic Steel Deck

2014 ◽  
Vol 17 (10) ◽  
pp. 1459-1468 ◽  
Author(s):  
Xiaochen Ju ◽  
Kazuo Tateishi
Keyword(s):  
Fatigue Crack ◽  
Stress Intensity ◽  
Fatigue Cracks ◽  
Equivalent Stress ◽  
Weld Bead ◽  
Propagation Mechanism ◽  
Mode Iii ◽  
Orthotropic Steel Deck ◽  
Deck Plate ◽  
Steel Deck

One of the typical fatigue cracks observed in orthotropic steel deck is a through-thickness crack which penetrates and propagates along the weld bead. Moreover, according to some reports of the fatigue crack observed in some bridges, the fatigue crack sometimes changes its direction suddenly, and propagates to the rib wall and the deck plate. Such fatigue damage can cause the sudden decrease of stiffness of longitudinal rib. However, the propagation mechanism of the crack has not been investigated clearly. In this study, numerical studies on the through-thickness crack at rib-to-deck weld bead in the orthotropic steel deck were carried out. Finite element model (FEM) of an orthotropic deck with different through-thickness crack at rib-to-deck weld bead was created. In order to identify the propagation behavior of the fatigue crack, stress intensity factors for three deformation modes were estimated by the FE analysis (FEA) and the displacement extrapolation method. Based on the maximum energy release rate (MERR) criterion, the equivalent stress intensity factor and the crack direction were evaluated. From the numerical results, the crack direction change was found to be originated by the Mode II and Mode III deformation near the crack tip due to the out-of-plane bending of the rib wall along the crack.

Effective Width of Steel Deck-Plate in Bridges

1969 ◽  
Vol 95 (7) ◽  
pp. 1459-1474
Author(s):  
George Abdel-Sayed
Keyword(s):  
Effective Width ◽  
Deck Plate ◽  
Steel Deck

Electrical Resistance Method for Fatigue Crack Detection of Steel Deck

2013 ◽  
Vol 361-363 ◽  
pp. 1397-1401 ◽  
Author(s):  
Zhou Zhi Yuan Yuan ◽  
Bo Hai Ji ◽  
Zhong Qiu Fu ◽  
Rong Liu ◽  
Miao Cheng
Keyword(s):  
Fatigue Crack ◽  
Electrical Resistance ◽  
Crack Detection ◽  
Crack Depth ◽  
Influential Factors ◽  
Element Analysis ◽  
Resistance Method ◽  
Electrode Space ◽  
Fatigue Crack Detection ◽  
Steel Deck

The present study employs an electrical resistance method for fatigue crack detection in steel deck. The detection influential factors are analyzed via the finite element analysis under different electrode space and deck width. As a result, the electrode space influenced on detecting precision, and the smaller the better. The resistance measurement method is presented, and the formula of fracture damage ratio and the equivalent crack depth are established. It is proved by fatigue crack detection experiment of U-rib specimen, which shows that using electrical resistance method to detect fatigue crack is feasible.

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