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Failure Probability for Fatigue Crack in Web Plate of Bridge Girder
https://orcid.org/http://orcid.org/0000-0002-2212-283X
Out-of-plane gusset joints are commonly used in welded assembly structures such as bridges. The studies regarding out-of-plane gusset joint often define fatigue life of this joint as the condition when the crack has fully penetrated through the web plate. However, the time frame from crack initiation until reaching complete structural failure is unclear. In this study, extended fatigue crack propagation analysis of out-of-plane gusset joint is performed. The variation of influential parameters such as flank angle, weld toe radius, material constant, and the threshold value of stress intensity factor range was considered. The crack propagation analysis was done until the crack reaches 80% of the lower flange plate of the bridge girder. Since the crack propagation life is highly influenced by traffic conditions, the probability distribution of the number of cycles and the crack width (2b) is presented in regards to the fatigue life ratio. In estimating the failure probability of the joint, the influence of human error to detect cracks during the inspection is considered. Five cases of the probability of crack detection are assumed to represent the capability of the inspector. It was found that bridge inspection and reparation of cracks are important in controlling the failure probability.
Failure Probability for Fatigue Crack in Web Plate of Bridge Girder
https://orcid.org/http://orcid.org/0000-0002-2212-283X
Out-of-plane gusset joints are commonly used in welded assembly structures such as bridges. The studies regarding out-of-plane gusset joint often define fatigue life of this joint as the condition when the crack has fully penetrated through the web plate. However, the time frame from crack initiation until reaching complete structural failure is unclear. In this study, extended fatigue crack propagation analysis of out-of-plane gusset joint is performed. The variation of influential parameters such as flank angle, weld toe radius, material constant, and the threshold value of stress intensity factor range was considered. The crack propagation analysis was done until the crack reaches 80% of the lower flange plate of the bridge girder. Since the crack propagation life is highly influenced by traffic conditions, the probability distribution of the number of cycles and the crack width (2b) is presented in regards to the fatigue life ratio. In estimating the failure probability of the joint, the influence of human error to detect cracks during the inspection is considered. Five cases of the probability of crack detection are assumed to represent the capability of the inspector. It was found that bridge inspection and reparation of cracks are important in controlling the failure probability.
Failure Probability for Fatigue Crack in Web Plate of Bridge Girder
https://orcid.org/http://orcid.org/0000-0002-2212-283X
Out-of-plane gusset joints are commonly used in welded assembly structures such as bridges. The studies regarding out-of-plane gusset joint often define fatigue life of this joint as the condition when the crack has fully penetrated through the web plate. However, the time frame from crack initiation until reaching complete structural failure is unclear. In this study, extended fatigue crack propagation analysis of out-of-plane gusset joint is performed. The variation of influential parameters such as flank angle, weld toe radius, material constant, and the threshold value of stress intensity factor range was considered. The crack propagation analysis was done until the crack reaches 80% of the lower flange plate of the bridge girder. Since the crack propagation life is highly influenced by traffic conditions, the probability distribution of the number of cycles and the crack width (2b) is presented in regards to the fatigue life ratio. In estimating the failure probability of the joint, the influence of human error to detect cracks during the inspection is considered. Five cases of the probability of crack detection are assumed to represent the capability of the inspector. It was found that bridge inspection and reparation of cracks are important in controlling the failure probability.
Failure Probability for Fatigue Crack in Web Plate of Bridge Girder
Int J Steel Struct
Putri, Cut Atika (Autor:in) / Tateishi, Kazuo (Autor:in) / Shimizu, Masaru (Autor:in) / Hanji, Takeshi (Autor:in)
International Journal of Steel Structures ; 22 ; 42-55
01.02.2022
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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