TRB’s National Cooperative Highway Research Program (NCHRP) Innovations Deserving Exploratory Analysis (IDEA) Final Report for NCHRP-IDEA 160: Super-Weathering Steel for Infrastructure Applications explores the development of new, low-cost steels with better weathering characteristics than those of current weathering steels. Project: Project Information Project Number: 20-30/IDEA 160 Read the Report
AASHTO Journal, 27 June 2014 Residents in the Oklahoma communities of Purcell and Lexington are once again able to easily access surrounding communities now that the Oklahoma Department of Transportation recently reopened a bridge that had been closed for emergency repairs. The James C. Nance Bridge (or the US-77/SH-39 bridge), which spans the South Canadian River and connects the…
The Missouri Department of Transportation has released a report for developing pile resistance factors for load and resistance factor design (LRFD) of bridges based on pile load tests. Read the Report
The Florida Department of Transportation has released a report that considers the long-term durability of reinforced concrete structures with external chloride concentrations different than those at the permanently immersed, tidal, and splash zones of partially-immersed bridges. Read the Report
The Florida Department of Transportation has released a report that summarizes research on reproducing and determining the cause of soft grout, which can be found in post-tensioned ducts in bridges. Read the Report
The Oregon Department of Transportation has released a report that addresses hydro-acoustic impacts of pile driving on bridges so that highway projects remain in compliance with established noise level criteria. Read the Report
TRB’s National Cooperative Highway Research Program (NCHRP) Report 776: Bridge System Safety and Redundancy provides proposed revisions to the design philosophy section of the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications. The following appendices are available for download: A1: Specifications A2: Commentary A3: Implementation Example for I-Girder System…
AASHTO Journal, 20 June 2014 Washington State Department of Transportation joined Seattle Tunnel Partners this week to announce specifics in the plan to repair Bertha, the world’s largest tunneling machine tasked with digging the State Route 99 Tunnel under Seattle. The machine, which is creating the tunnel as part of the Alaskan Way Viaduct Replacement Program, was placed in the…
AASHTO Journal, 20 June 2014 South Carolina Department of Transportation officials announced Thursday four bridges that will be replaced, representing the first projects to receive revenue from ACT 98, a law passed last year that provides additional funding for bridge, resurfacing, and mainline interstate projects. Signed into law by Governor Nikki Haley one year ago, ACT 98 provides SCDOT…
The Florida Department of Transportation has released a report that explains the effect of bridges’ stress condition and environmental exposure on corrosion of post-tensioned strands during ungrouted periods. Read the Report
The U.S. Federal Highway Administration has released a report that documents possible uses of embedded gauges and low-cost data collection systems that can monitor bridge foundations during and after construction. Read the Report
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…
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…
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…
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
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