Tuesday, December 12, 2017 - 19:00
This report documents the results of IDEA project 179, Development of a Portable Stress Measurement Instrument. An ultrasonic stress measurement (USM) instrument has been developed that provides bridge engineers with quantitative measurements of the in-situ stresses in bridge members. The instrument is very unique because there are no other practical total...
Friday, October 27, 2017 - 20:15
Bridge decks are commonly rehabilitated using overlays depending on the cause of deck deterioration, available budget, and desired service life of the rehabilitated structure. One emerging solution for bridge deck rehabilitation is thin, bonded ultra-high performance concrete (UHPC) overlays. As an overlay material, UHPC can provide both structural...
Wednesday, May 17, 2017 - 19:30
On August 1, 2007, the I–35W Mississippi River Bridge (I–35W Bridge) in Minneapolis, MN, collapsed. The National Transportation Safety Board (NTSB) turned to the Federal Highway Administration (FHWA) to provide technical expertise during their investigation. In response, NTSB issued recommendations to FHWA and the American Association of State...
Friday, March 3, 2017 - 16:15
The bump at the end of the bridge has long been studied for highways and railways, yet experts from across the transportation industry continue to identify it as one of the most prevalent substructure factors affecting bridge performance. Often, rideability is a subjective measurement used by transportation departments to define the presence of a bump. User...
Friday, March 3, 2017 - 16:00
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 505: Current Practices and Guidelines for the Reuse of Bridge Foundations provides guidance on reusing bridge foundations, a sustainable option for many bridge replacement and rehabilitation efforts that can result in time and cost savings as well as reduced mobility impacts and...
Wednesday, June 22, 2016 - 18:00
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, April 22, 2016 - 20:00
The Iowa Department of Transportation (DOT) is responsible for approximately 4,100 bridges and structures that are a part of the state’s primary highway system, which includes the Interstate, US, and Iowa highway routes. A pilot study was conducted for six bridges in two Iowa river basins—the Cedar River Basin and the South Skunk River Basin—...
Wednesday, April 13, 2016 - 15:30
This report synthesizes the current service limit state (SLS) design and analyses of engineered fills for bridge support used as shallow foundations. The SLS for settlement and deformations of bridge supports are summarized. Extensive literature reviews were conducted to synthesize the effects of various parameters on the SLS of engineered fills. The...
Thursday, March 31, 2016 - 15:45
The objective of this research was to assess the efficacy of various waterproofing sealers applied to pavement joints with respect to limiting water ingress. The measure of water ingress was the chloride concentration profile as measured by scanning electron microscopy and energy dispersive spectroscopy.
The fieldwork was conducted at the MnROAD facility....
Wednesday, March 2, 2016 - 22:30
Engineered fills, including compacted granular fill and reinforced soil, are a cost-effective alternative to conventional bridge foundation systems; however, limited guidance exists on estimating the settlement and lateral deformation of these features under service conditions. Additionally, the stress distribution within these features is not well understood,...
Tuesday, January 26, 2016 - 20:15
This electronic encyclopaedia, called "Road Tunnels Manual", comprises two principal parts. The part “Transverse aspects” contains 5 chapters that consider general aspects of road tunnels. The part “Operational and Safety Requirements” of the Manual contains 4 chapters and addresses particular elements of tunnels taking these...
Tuesday, January 26, 2016 - 20:00
Cette encyclopédie électronique, appelée "Manuel des Tunnels routiers", comprend deux parties principales. La partie « Aspects transversaux » comporte 5 chapitres qui traitent des aspects transversaux des tunnels routiers. La partie « Exigences opérationnelles et sécuritaires » du Manuel comprend 4 chapitres et traite des...
