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TAC Research Bulletin

The TAC Research Bulletin highlights recently-published reports and articles from around the world with relevance to road transportation in Canada. Full text links are included, so you get more than just the abstract.

E.g., 10/16/2019
E.g., 10/16/2019
Thursday, September 19, 2019 - 16:00
The University Transportation Center at Utah State University sponsors research through the Federal Highway Administration’s University Transportation Center Program. The purpose of this research is to advance technology and expertise in transportation-related fields. This includes research on the best methods to design, monitor, and inspect bridges. When...
Thursday, September 19, 2019 - 15:45
Post-tensioning has evolved to become the construction method of choice for many large structures, including bridges. However, instances of corrosion-induced fracture of wires and strands and resultant tendon failures have occurred as a consequence of either chemically or physically deficient grout (or a combination of these), where the former involves elevated...
Thursday, September 19, 2019 - 15:45
Post-installed reinforcement is used to connect a new concrete member to an existing concrete structure. Typically, uncoated rebar post-installed with a chemical adhesive is used in these applications, which may lead to corrosion. Departments of Transportation and local bridge owners have used and continue to use epoxy-coated rebar in post-installed...
Wednesday, August 28, 2019 - 19:15
Scour at bridge substructure units can cause undermining of footings and exposure of piles, which can lead to bridge failure. Monitoring of the streambed elevations around a scour critical bridge to identify whether or not scour is occurring during a high-flow event is critical. Working on or near the water may be dangerous during these events. The study...
Wednesday, August 28, 2019 - 19:00
Bridge performance measures are important components of any successful Bridge Management System. Different types of performance measures have been developed for various purposes. The types of performance measures are usually a reflection of an agency’s goals. The bridge health or condition index is a type of performance measure used by agencies interested...
Friday, July 12, 2019 - 19:15
This study compared the fabrication requirements, corrosion resistance, mechanical properties, construction components, and cost of using traditional bridge steels and corrosion-resistant steels. Comparisons were made based on existing literature, discussions with and knowledge gained from industry experts, experimental testing, and field visits. Types of...
Wednesday, April 3, 2019 - 17:45
Advancements in the science of concrete materials have led to the development of a new class of cementitious composites called ultra-high performance concrete (UHPC). UHPC exhibits mechanical and durability properties that make it ideal for use in new solutions to pressing concerns about highway-infrastructure deterioration, repair, and replacement. The use of...
Wednesday, April 3, 2019 - 17:30
Based on bridge failure data compiled by the New York State Department of Transportation, collision, both caused by vessels and vehicles, is the second leading cause of bridge failures after hydraulic. The current AASHTO-LRFD (2012) specification recommends designing a bridge pier vulnerable to vehicular impacts for an equivalent static force of 600 kips (2,670...
Wednesday, April 3, 2019 - 17:30
Current bridge management systems predict the condition state of bridge elements primarily based on the extent of continuous structural deterioration. While the existing systems deliver a range of capabilities for the management of bridges under normal operational conditions, they lack the capability to take into account the consequences of sudden extreme...
Tuesday, February 5, 2019 - 15:45
Foundations of existing highways and over-river bridges may have significant functional value. Hence, reuse of foundations of existing bridges during reconstruction or major rehabilitation can result in significant savings in costs and time. This report on bridge foundation reuse addresses critical issues encountered during decision-making on foundation reuse,...
Wednesday, January 2, 2019 - 19:30
Prefabricated bridge elements and systems (PBES) are integral to many accelerated bridge construction projects, and prefabricated deck panels are one of many PBES types that have gained popularity in such projects. Laboratory research and field studies have indicated the primary challenge for these systems is the design and construction of the connections,...
Tuesday, February 13, 2018 - 18:45
Precast/prestressed double tee bridge girders are widely used for accelerated bridge construction on local roads in South Dakota. A common issue among existing double tee bridges in South Dakota is the rapid deterioration of longitudinal joints (shear keyways) between adjacent girders. Deteriorated joints allow moisture and deicing chemicals to reach the deck...

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