Challenges of Skew in Bridges with Steel Girders

Coletti, Domenic; Chavel, Brandon; Gatti, Walter

doi:10.3141/2251-05

Cited by 11 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Displacements because of skew likely have two main sources: 1) thermal expansion or contraction, and 2) interaction of thermal expansion with certain types of bridge abutments ( 16 , 17 ). Under long-term loading, the main direction of superstructure expansion or contraction is along the path connecting acute corners.…”

Section: Skew Effects On Bridge Analysis Performancementioning

confidence: 99%

Role of Skew on Bridge Performance

Arancibia

Rugar

Okumus

2020

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

Gravity load paths of high-skew bridges differ from the ones with no skew. High skew can also lead to stresses or displacements that adversely affect service performance. This paper demonstrates the effects of skew on bridges through finite element analyses, bridge inspections, and statistical analyses. Five deck-girder type bridges with and without skew were inspected. A database of more than 1,400 deck-girder type bridges was analyzed to seek relationships between skew and National Bridge Inventory (NBI) ratings. Practices of Departments of Transportation (DOT) were compared with each other and to provisions of AASHTO LRFD Bridge Design Specifications (BDS). Acute deck corner cracking and bridge movements were documented on some high-skew bridges. Field inspections and database analyses showed that not all high-skew bridges have performance issues, and NBI ratings are in general not sensitive to skew. This is likely because of many factors affecting performance and certain details mitigating skew effects.

show abstract

Section: Skew Effects On Bridge Analysis Performancementioning

confidence: 99%

Role of Skew on Bridge Performance

Arancibia

Rugar

Okumus

2020

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

show abstract

“…This means that a fully integrated bridge must be designed to handle larger stress concentrations, while the semi-integral bridge must be designed to handle larger displacements. Design codes specify that semi-integral abutment bridges are required to use when the skew angle of the bridge is above 30-degree angle [1][2][3][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Environment-Induced Performance of End Concrete Diaphragm in Skewed Semi-Integral Bridges

Hussein¹,

Khoury

Lucas

2022

Buildings

View full text Add to dashboard Cite

Past research has shown that as skewed bridges change temperature, additional lateral movement or forces will occur along with the elongation of the bridge. Even though past research has documented this behavior, lateral movements of semi-integral bridge superstructure associated with temperature effects on bridge skewness have not been well predicted. In this study, the seasonal movements of a 24-year-old semi-integral bridge caused by temperature effects with skewed abutment have been investigated by conducting a series of field measurements on bridges subjected to various environmental climates. The measured data showed that as the bridge heated up, the superstructure tended to move toward the acute corner of the bridge, and the bridge would contract towards its obtuse corner with a negative temperature change. During warm weather, the cracks on the end diaphragm tended to open with a positive temperature change and close with a negative temperature change, which was much more predictable than the cold weather behavior. This behavior confirms that even though the bridge moves linearly with temperature, the end diaphragm response to the temperature depends on the season. Movement of the bridge superstructure from temperature change has caused cracks in the end diaphragm, which are now propagating to the deck. These cracks could damage the bridge enough that it would require repair work in the future. The evidence in this study will help provide a complete picture of seasonal jointless bridge behavior so future semi-integral bridges can be made safer and more efficient.

show abstract

Effect of Bridge Skew on the Analytical and Experimental Responses of a Steel Girder Highway Bridge

Judd

2022

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

This study examines the effect of bridge skew on the load rating and natural frequencies of a steel girder skewed highway bridge. The analytical load rating was determined based on a line-girder model and the AASHTO bridge design specification. The experimental load rating was determined based on a series of calibrated-weight truck runs. The analytical natural frequency was determined based on correlating the single span response to a continuous span response. The experimental natural frequency was obtained based on the free vibration response from the calibrated-weight truck. The frequency associated with the first spike of the frequency domain plot was identified using a Fast Fourier Transformation. The results show that the analytical load ratings and natural frequencies differed from the experimental values primarily due to effect of bridge skew, which caused the actual load path to be significantly shorter than the bridge span length that was used in the analytical calculations.

show abstract

Challenges of Skew in Bridges with Steel Girders

Cited by 11 publications

References 4 publications

Role of Skew on Bridge Performance

Role of Skew on Bridge Performance

Environment-Induced Performance of End Concrete Diaphragm in Skewed Semi-Integral Bridges

Effect of Bridge Skew on the Analytical and Experimental Responses of a Steel Girder Highway Bridge

Contact Info

Product

Resources

About