Engineering Commons^™

Destructive Testing Of Composite Precast Concrete Deck Panels And Built-Up Steel Plate Girders, Wesley J. Cook

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Utah Department of Transportation (UDOT) has implemented the use of precast concrete panels for bridge deck construction. A bridge utilizing these panels as a reconstruction method was decommissioned three years after the new deck installation, due to unrelated matters. Two sections of this bridge were salvaged and sent to Utah State University (USU) for destructive testing.

Each bridge section consisted of two built-up steel plate girders intact with the precast concrete deck panels. The precast panels were designed and constructed to achieve full composite action between the deck and built-up steel plate girders through the use of Nelson shear …

Destructive Testing And Finite-Element Modeling Of Full-Scale Bridge Sections Containing Precast Deck Panels, Travis R. Brackus

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Full-depth, precast panel deck systems are becoming more common in bridge installation and repair. The objective of these systems is to achieve the performance of cast-in-place systems while simultaneously saving time and money. The structural behavior of these systems has been the subject of scrutiny in recent research. The Utah Department of Transportation demolished a steel I-girder bridge containing a precast panel deck system and provided two full-scale specimens for this project. Destructive testing was performed at Utah State University on the specimens to investigate three failure modes: flexural, beam shear, and punching shear. Finite-element models were created using ANSYS …

Design Aids Of Nu I-Grinder Bridges, Kromel Hanna, George Morcous, Maher K. Tadros

Nebraska Department of Transportation: Research Reports

No abstract provided.

Analytical Seismic Fragility Curves For Skewed Multi-Span Steel Girder Bridges, Ian Sullivan

All Theses

Most of the past seismic fragility studies on typical highway bridges in the Central and Southeastern United States (CSUS) have focused on regular multi-span bridges with little to no skew. However, past earthquakes and studies have shown that skewed multi-span simply supported bridges may also be susceptible to earthquake damage, specifically causing coupled responses (longitudinal and transverse) that place more demand on individual components. With over 27 percent of simply supported steel girder highway bridges in the CSUS having a skew angle over 15 degrees, there is a specific need to further quantify the vulnerability of such bridges exposed to …

Nondestructive Testing Of Defective Astm A 514 Steel On The I ‐ 275 Combs‐Hehl Twin Bridges Over The Ohio River In Campbell County, Kentucky, Theodore Hopwood Ii, Sudhir Palle

Kentucky Transportation Center Research Report

Three defective ASTM A 514 steel splice plates were discovered on the I-275 Combs-Hehl twin bridges over the Ohio River. A follow-on in-depth field inspection of 1,356 A 514 steel plates on the bridges revealed 14 additional defective gusset and splice plates. The A 514 steel was improperly heat-treated resulting in a brittle crack-prone microstructure. Ultrasonic and impact hardness tests were used to identify the defective steel. Subsequently, the defective steel plates were either removed or lapped with additional steel plates.

A Truck-Mounted Scour Inspection System For Indot, Dennis Lyn, Thomas Cooper, Ranadeep Das

JTRP Technical Reports

Scour monitoring may be a useful tool for INDOT in dealing with local scour problems at bridge sites, and a truck-mounted scour-monitoring system is an attractive option offering flexibility in deployment and cost-effectiveness. This report deals with two aspects related to the further development of such a system: i) a web application that combines the latest available information regarding streamflow with relevant information regarding bridges considered susceptible to bridge scour, thereby assisting in truck-deployment decisions, and ii) development of an acoustic positioning system as a replacement of the original mechanical positioning in order to improve the ease of use.

The …

Transfer And Development Length Of Strands In Post-Tensioned Members After Anchor Head Failure, Elie El Zghayar

Electronic Theses and Dissertations

Post-tensioning tendons in segmental bridge construction are often only anchored within the deviator and pier segments. The effectiveness of the post-tensioning (PT) system is therefore dependent on proper functioning of the anchorages. On August 28, 2000 a routine inspection of the Mid-Bay Bridge (Okaloosa County, Florida) revealed corrosion in numerous PT tendons. Moreover, one of the 19-strand tendons was completely slacked, with later inspection revealing a corrosion-induced failure at the pier anchor location. Anchorage failure caused all PT force to transfer to the steel duct located within the pier segment that in turn slipped and caused the tendon to go …

Estimating The Characteristic Vertical Response Of A Flexible Footbridge Due To Crowd Loading, Joe Keogh, Colin C. Caprani, Paul Archbold, Paul Fanning

Conference papers

The issue of excessive vibration of footbridges due to pedestrian loading is now well documented. Bridge vibrations produced from a crowd of pedestrians have been estimated by modifying the effect caused by a single pedestrian by an enhancement factor to take crowd synchronization into account. In this paper this approach is extended to account for the fact that all pedestrians will not have the same pacing frequencies, and the effects of distributions of pacing frequency and other parameters on the enhancement factor are investigated. It is shown that this more faithful representation of pedestrian crowd walking behaviour gives reduced vibration …