Fatigue and Fracture Library for the Inspection, Evaluation, and Repair of Vehicular Steel Bridges

Fish, Phil; Schroeder, Curtis J.; Connor, Robert; Sauser, Phil

doi:10.5703/1288284315520

Cited by 4 publications

(13 citation statements)

References 5 publications

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“…Among the guidelines listed were the FHWA Manual for Repair and Retrofit of Fatigue Cracks (Dexter & Ocel, 2013), Fatigue and Fracture Library for the Inspection, Evaluation, and Repair of Vehicular Steel Bridges (Fish et al, 2015), and one state-specific guideline. 4.…”

Section: Summary Of Survey Resultsmentioning

confidence: 99%

“…Years following the Silver Bridge collapse, a few other fractures in non-load path redundant bridges, not resulting in collapse, also heightened the interest of industry leaders resulting in more stringent requirements for bridges containing non-redundant ''fracture critical '' members (FCM). The 1978 AASHTO Fracture Control Plan (FCP) included reduced allowable fatigue stress ranges, more rigorous Charpy V-Notch (CVN) testing requirements, more thorough shop inspection, and the federal requirement for arms-length visual inspection of FCM's every 24 months (AASHTO, 1978;Fish et al, 2015).…”

Section: Historical Steel Bridge Issuesmentioning

confidence: 99%

“…The AASHTO Fracture Control Plan attempted to address this, as well as reduce risk of fracture in non-redundant steel members. These many industry improvements over the years have combined to forge a generation of steel bridges that are perceived to have a lower risk of fracture, as compared to those bridges built prior to the 1978 FCP criteria (Fish et al, 2015).…”

Section: Historical Steel Bridge Issuesmentioning

confidence: 99%

“…However, high strain rate events can occur on bridges, such as impact loading from an over-height vehicle. The effect of loading rate is usually considered as an adjustment to the minimum specified fracture resistance of a material instead of explicitly considering the loading rate in an analysis (Fish et al, 2015).…”

Section: Strain Ratementioning

confidence: 99%

“…The nucleation phase of fatigue comprises the vast majority of the overall fatigue life of a given detail, estimated to consume as much as 90 percent, and is largely unaffected by material properties (Fish et al, 2015). However, the nucleation stage is highly dependent on pre-existing imperfections in the member.…”

Section: Fundamentals Of Fatiguementioning

confidence: 99%

See 4 more Smart Citations

Maintenance Actions to Address Fatigue Cracking in Steel Bridge Structures: Proposed Guidelines and Commentary

Connor¹,

Lloyd²

2017

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This document provides guidelines for the maintenance actions to address fatigue cracking and details at risk of constraint-induced fracture (CIF) in steel bridges. It is a synthesis of best practices from published literature, project reports, past and ongoing research projects, as well as input from industry professionals gathered through a web-based survey. Intended to be a very practical reference text, it is written with everyone in mind from a maintenance contractor to an asset manager and design engineer, providing detailed descriptions of the driving causes of fatigue cracking and CIF in steel bridges and accepted methods for repair or retrofit.

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Section: Summary Of Survey Resultsmentioning

confidence: 99%

Section: Historical Steel Bridge Issuesmentioning

confidence: 99%

Section: Historical Steel Bridge Issuesmentioning

confidence: 99%

Section: Strain Ratementioning

confidence: 99%

Section: Fundamentals Of Fatiguementioning

confidence: 99%

See 3 more Smart Citations

Maintenance Actions to Address Fatigue Cracking in Steel Bridge Structures: Proposed Guidelines and Commentary

Connor¹,

Lloyd²

2017

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Investigation on Crack Repairing Technique to Delay Fracture Initiation of Steel Members Subjected to Low Cycle Fatigue

Abeygunasekara,

Gamage,

Fawzia

2023

Preprint

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The stress concentrations have become common phenomenon of steel elements when arresting a fracture by implementing the crack stop hole (CSH) technique. Embedding the CSH with Carbon Fibre Reinforced Polymer (CFRP) enhance the fatigue life by delaying the fractures while achieving a stiffness recovery due to superior mechanical characteristics of CFRP material. Hence, low cyclic fatigue (LCF) behaviour of 162 strengthened and non-strengthened CSH specimens were examined in this context. These specimens were subjected to a range of 0 to10,000 fatigue load cycles with the frequency of 5 Hz. At the end of fatigue exposure, the average tensile strength was measured in each case. The average strength reductions in the range between 13% to 25% was noted in steel elements with CSH subjected to fatigue exposure. The application of a CFRP patch on CSH had effectively recovered the strength losses while enhancing the strength in the range between 32% to 45% with respect to the non-strengthened non specimens. The developed numerical model based on cyclic J-integral technique agrees with test results and is capable of predicting characteristics for this novel hybrid technique.

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Investigation of Crack Repairing Technique to Delay Fracture Initiation of Steel Members Subjected to Low Cycle Fatigue

Abeygunasekara,

Gamage,

Fawzia

2023

Buildings

View full text Add to dashboard Cite

Stress concentrations have become a common phenomenon in steel elements when arresting a fracture by implementing the crack stop hole (CSH) technique. Embedding the CSH with Carbon Fibre-Reinforced Polymer (CFRP) enhances the fatigue life by delaying fractures while achieving stiffness recovery due to the superior mechanical characteristics of the CFRP material. Hence, the low cyclic fatigue (LCF) behaviour of 90 strengthened and non-strengthened CSH specimens was examined in this context. These specimens were subjected to a range of 0 to 10,000 fatigue load cycles at a frequency of 5 Hz. At the end of fatigue exposure, the average tensile strength was measured in each case. The application of a CFRP patch on the CSH effectively recovered the strength losses while enhancing the strength in the range of 32% to 45% with respect to the non-strengthened specimens. The developed numerical model based on the cyclic J-integral technique agrees with the test results. This study introduced geometry-related design guidelines for this novel CSH hybrid technique.

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Fatigue and Fracture Library for the Inspection, Evaluation, and Repair of Vehicular Steel Bridges

Cited by 4 publications

References 5 publications

Maintenance Actions to Address Fatigue Cracking in Steel Bridge Structures: Proposed Guidelines and Commentary

Maintenance Actions to Address Fatigue Cracking in Steel Bridge Structures: Proposed Guidelines and Commentary

Investigation on Crack Repairing Technique to Delay Fracture Initiation of Steel Members Subjected to Low Cycle Fatigue

Investigation of Crack Repairing Technique to Delay Fracture Initiation of Steel Members Subjected to Low Cycle Fatigue

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