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Full-Text Articles in Engineering

Detection Of Multiple Flaws In Concrete Bridge Decks Using Ultrasonic Wave Propagation, Ece Erdogmus, Eric Garcia, Michael Schuller, Donald Harvey, Kelsey Stithem, Monica Houck Dec 2018

Detection Of Multiple Flaws In Concrete Bridge Decks Using Ultrasonic Wave Propagation, Ece Erdogmus, Eric Garcia, Michael Schuller, Donald Harvey, Kelsey Stithem, Monica Houck

Nebraska Department of Transportation: Research Reports

No abstract provided.


Development Of Iowa Dot Combination Bridge Separation Barrier With Bicycle Railing, Chaz M. Ginger Aug 2018

Development Of Iowa Dot Combination Bridge Separation Barrier With Bicycle Railing, Chaz M. Ginger

Department of Engineering Mechanics: Dissertations, Theses, and Student Research

The Iowa Department of Transportation typically builds separation barriers between vehicle and pedestrian/bicycle facilities when sidewalks or trails are present on vehicular bridges. Currently, Iowa DOT employs a combination bridge rail that utilizes a concrete parapet that previously had been successfully evaluated to National Cooperative Highway Research Program (NCHRP) Report 350 Test Level 4 (TL-4) criteria for these situations. While the parapet had been successfully evaluated, the combination bridge rail system as a whole had not been evaluated to any crash test standards. Iowa DOT desired that researchers at Midwest Roadside Safety Facility (MwRSF) design and test a combination bridge …


Structural Identification And Assessment Of The Inverted Tee Girder Bridge System, Garrett P. Martindale Apr 2018

Structural Identification And Assessment Of The Inverted Tee Girder Bridge System, Garrett P. Martindale

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

The Inverted Tee (IT) girder bridge system was originally developed in 1996 by the University of Nebraska–Lincoln (UNL) and Nebraska Department of Roads (NDOR) engineers. This bridge system currently accounts for over 110 bridges in Nebraska used for both state highways and local county roads. Excessive transverse and longitudinal deck cracking has been observed and noted in numerous bridge inspection reports. Since the IT girder bridge system is relatively new, limited data and knowledge exist on its structural performance and behavior. This study evaluates the IT girder bridge system by conducting twenty field observations as well as recording accelerometer time …