The Louisiana Department of Transportation and Development has released a report that explains its efforts to minimize bridge end bump problems associated with differential settlement. Read the Report
AASHTO Journal, 6 June 2014 Officials at the Delaware Department of Transportation are working this week to get a heavily traveled bridge on busy I-495 back up and running after an emergency closure this week. On Monday, DelDOT officials found during an inspection that four support piers had shifted on Bridge I-813 over the Christina River on I-495. Engineers found…
AASHTO Journal, 6 June 2014 New York Governor Andrew Cuomo this week joined New York State Department of Transportation Commissioner Joan McDonald to announce that the state has chosen a design-build team to tackle its largest single contract ever—a $555 million bridge replacement in the New York City area. The Kosciuszko Bridge, which carries the Brooklyn-Queens Expressway over Newtown…
The Center for Transportation Research and the University of Texas at Austin has released a report that investigates the behavior of cross frames on bridges from both a strength and stiffness perspective. Read the Report
The Center for Transportation Research and the University of Texas at Austin has released a report that provides guidance and training materials for shear strengthening of concrete bridge girders using externally bonded and anchored carbon fiber reinforced polymer (CFRP) systems. Read the Report
TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis Program has issued a request for letters of interest to synthesize the significant information on the differences between damage caused by different extreme events. Information on consultants letters of interest, qualifications, and the submission process are available online at http://www.trb.org/SynthesisPrograms/NewTopicsNCHRP.aspx. Letters of interest are due by August 15, 2014. Read the…
TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis Program has issued a request for letters of interest to synthesize field welding solutions and techniques that have been used successfully on existing bridges. Information on consultants letters of interest, qualifications, and the submission process are available online at http://www.trb.org/SynthesisPrograms/NewTopicsNCHRP.aspx Letters of interest are due by August 15, 2014. Read Additional…
Tom Warne Report, 27 May 2014 Florida Times-Union – May 19, 2014 The federal government is responsible for several errors which resulted in a towed Navy cargo ship striking the Matthews Bridge last September, and should pay for the $4.1 million repair, Florida transportation officials claim in a filing in naval court last month. The state reported that the…
AASHTO Journal, 23 May 2014 Last Saturday, May 17, the Louisiana Department of Transportation and Development reopened a vital bridge for Iberville Parish residents a month and a half ahead of schedule, allowing citizens to get back to their driving routines sooner than expected. The La. 77 bridge over the Intracoastal Canal closed to traffic at the end of…
The Florida Department of Transportation has released a report that assesses the use of carbon fiber composite cables in lieu of conventional steel prestressing strands in bridge foundations. Read the Report
TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-R19A-RW-1: Bridges for Service Life Beyond 100 Years: Innovative Systems, Subsystems, and Components develops approaches and procedures to enhance service life design for existing and new bridges. Read the Report
The Kentucky Transportation Center has released a report that considers ways to improve decisions about the replacement or rehabilitation of historic truss bridges. Read the Report
The Florida Department of Transportation has released a report that scrutinizes the corrosion and structural performance of three candidate high strength stainless steel materials for prestressed concrete piles. Read the Report
The Florida Department of Transportation has released a report that addresses the rationale for defining the uppermost limit of mineral drill slurry in drilled shaft construction of bridges. Read the Report
The Upper Great Plains Transportation Institute at the North Dakota State University has released a report that presents a research program examining the performance of constructed bridges in a cold region and the behavior of concrete members strengthened with carbon fiber reinforced polymer composite sheets. Read the Report
The Virginia Department of Transportation has released a report that updates its management plan for historic bridges by collecting information on the status of Virginia’s 54 historic bridges. Read the Report
The Florida Department of Transportation has released a report that explores the Phased Array Ultrasonic Testing (PAUT) to help determine whether the testing process might in future be adopted under the American Welding Society (AWS) D1.5 code as a suitable substitute for the currently required radiographic testing of steel bridge welds. Read the Report
AASHTO Journal, 25 April 2014 Bertha, the world’s largest boring machine tasked with tunneling under downtown Seattle for the new State Route 99, will not resume her job until March 2015, Washington State Department of Transportation officials announced this week. The machine, which is creating the tunnel as part of the Alaskan Way Viaduct Replacement Program, had been placed in…
AASHTO Journal, 25 April 2014 Last week, officials from Kentucky and Indiana joined to re-open a half-mile bridge just one week after sliding the entire bridge laterally into place over the Ohio River, the longest bridge in North America to do so. The $103 million Milton-Madison Bridge, which was slid 55 feet from temporary supports onto its new piers…
AASHTO Journal, 25 April 2014 Just in time for summer construction season and only months from a looming Highway Trust Fund insolvency issue, the American Road & Transportation Builders Association this week released data that show the health of bridges across the nation depend on HTF funds to remain in operation for the public. ARTBA analyzed data released by…
The Florida Department of Transportation has released a report that explores procedures for determining bracing forces during bridge construction and examines wind load coefficients (drag, torque, and lift) for common bridge girder shapes with stay-in-place (SIP) form work and overhang form work in place. The report also includes recommended global (system) pressure coefficients (e.g., for strength design of substructures)….
The U.S. Federal Highway Administration has released a tech brief that explains how two chloride threshold values of 0.4 and 0.8 percent by weight of cement were determined for corrosion initiation and corrosion propagation of bridges. Read the Tech Brief
TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 201: Calibration of AASHTO LRFD Concrete Bridge Design Specifications for Serviceability explores calibrating the service limit states related to concrete bridges in the American Association of State Highway and Transportation Officials’ Load Resistance Factor Design Bridge Design Specifications (AASHTO LRFD). A limit state is defined as the boundary between acceptable…
The Transportation Research Board (TRB) has published NCHRP Synthesis 453 – “State Bridge Load Posting Processes and Practices”. Read NCHRP Synthesis 453
The Eastern Seaboard Inter-modal Transportation Applications Center at Hampton University has released a report that explains how acoustic emission monitoring can be used to assess corrosion and other deterioration in highway bridges so as to perform maintenance, rehabilitation, and repair. Read the Report
AASHTO Journal, 4 April 2014 Michigan Department of Transportation officials announced Wednesday that Quantum Signal has become the first company to receive manufacturer plates under a new Michigan law that broadens eligibility in automated vehicle testing on the state’s roadways. Gov. Rick Snyder signed Public Act 231 into law last December, a measure that “explicitly approved testing of…
AASHTO Journal, 28 March 2014 Tennessee Department of Transportation officials last week were on hand to celebrate the opening of a bridge that will more easily connect two communities after years of planning. TDOT last weekend opened the new $29.5 million SR 109 bridge, allowing one lane in each direction to carry vehicles across the span, which connects the…
This study evaluated various techniques that use mechanical waves for the evaluation of critical concrete properties, such as proper consolidation of the concrete during placement and strength development; changes in modulus; and the detection of cracks, voids, and delaminated regions. The methods evaluated were ultrasonic shear-wave tomography, ultrasonic pulse velocity, crosshole sonic logging, sonic echo-impulse response, spectral analysis of surface…
The Louisiana Transportation Research Center has released a report that explains the installation and performance of the first fiber reinforced polymers-wrapped balsa wood bridge in Louisiana. Read the Report
AASHTO Journal, 21 March 2014 A report released this week by the Indiana Department of Transportation shows that a major bridge project, constructed in partnership with the Kentucky Transportation Cabinet, will not only better connect the two areas and provide greater mobility, but also infuse $87 billion into the local economy and add 15,000 jobs to the area. The…
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