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Category: New Technology

Self-Consolidating Concrete for Cast-in-Place Bridge Components

2016-09-14
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, Journals/Publications, New Technology, News

  TRB’s National Cooperative Highway Research Program (NCHRP) Report 819: Self-Consolidating Concrete for Cast-in-Place Bridge Components presents recommended guidelines for the use of self-consolidating concrete (SCC) in cast-in-place highway bridge components. These guidelines address the selection of constituent materials, proportioning of concrete mixtures, testing methods, fresh and hardened concrete properties, production and quality control issues, and other aspects of…

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Long-Term Bridge Performance Committee Letter Report: July 5, 2016

2016-09-13
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, New Technology, News, Studies / Reports

  On July 5, 2016, TRB’s Long-Term Bridge Performance (LTBP) Committee sent its seventh letter report to Gregory Nadeau, administrator of the U.S. Federal Highway Administration (FHWA). The committee provides advice and assistance on the conduct of the LTBP program, which is designed to collect research-quality data on a large representative sample of in-service U.S. highway bridges and to…

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New Hampshire, Maine DOTs Permanently Close Sarah Long Bridge to Vehicle Traffic

2016-09-08
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, Legislative / Political, New Technology, News

AASHTO Journal, 26 August 2016 Officials of the New Hampshire Department of Transportation and Maine Department of Transportation said Aug. 24 they had to permanently close the malfunctioning Sarah Mildred Long Bridge to motor vehicle traffic more than two months early. The 76-year-old lift bridge connects Portsmouth, N.H., and Kittery, Maine, on the US 1 Bypass over the Piscataqua…

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Investigation of Premature Strip Seal Joint Failures and Recommendations for Assuring Proper Strip Seal Joint Installation: Bridge 5/104W

2016-09-08
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| Categories: Bridge Design/Const., Bridge Pres. Apps., New Technology, News, Studies / Reports, Treatments

The Washington State Department of Transportation has released a summary of an investigation that was performed to identify the causes of premature failures of strip seal expansion joints that were installed on a bridge in Washington State. Read the Investigation Summary

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Along for the Ride: The road to getting a bridge built

2016-08-18
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, New Technology, News

St. Louis Post-Dispatch, 14 August 2016 Leah Thorsen The strong push for a new bridge over the Missouri River in Washington, Mo., began in earnest after the collapse of the Interstate 35 bridge in Minneapolis. That was back in 2007, on Aug. 1 to be exact. Bob Zick ticks off the date without hesitation, remembering the day he knew…

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Texas Officials Launch $930M Project to Replace Corpus Christi Harbor Bridge

2016-08-17
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, Legislative / Political, New Technology, News

AASHTO Journal, 12 August 2016 Gov. Greg Abbott and other Texas officials participated in a groundbreaking ceremony Aug. 8 to launch a $930 million construction project to build a new Harbor Bridge over the Port of Corpus Christi’s main turning basin. When completed – mostly by April 2021 – planners say the new structure will provide 205-foot clearance over…

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Upgrading Bridge Rails on Low-Volume Roads in Iowa

2016-08-16
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, Journals/Publications, New Technology, News

The Institute for Transportation at Iowa State University has released a report that identifies significant influencing factors to consider for future updates to the Iowa DOT’s Instructional Memorandum 3.213, which provides guidelines for determining the need for traffic barriers at secondary roadway bridges. Read the Report

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Missouri River Bridge Reopening Delayed After Paint Work Reveals More Repair Needs

2016-08-10
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, New Technology, News

AASHTO Journal, 5 August 2016 While Missouri Department of Transportation contractor crews were blasting old paint off a bridge built in 1955 to get it ready for a fresh paint job, they uncovered structural problems that will keep the structure in the state capital closed beyond the original schedule. The new repairs, MoDOT officials said July 29, “will delay…

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Dual Purpose Bridge Health Monitoring and Weigh-in-motion (BWIM) Phase I

2016-08-04
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, New Technology, News, Studies / Reports

The Connecticut Department of Transportation has released a report that establishes a single monitoring system comprised of sensors, data acquisition, and processing capabilities that can carry out long-term health monitoring of a highway bridge and bridge-weigh-in-motion system. Read the Report

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Effectiveness of Exterior Beam Rotation Prevention Systems for Bridge Deck Construction

2016-07-28
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, New Technology, News, Studies / Reports

The Illinois Center for Transportation at the University of Illinois has released a report that evaluates current bracing systems by using field instrumentation, finite element analysis, and the Torsional Analysis Exterior Girders program—a program used by bridge designers to design bracing systems to prevent exterior girder rotation. Read the Report

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Integral Abutment Bridges Under Thermal Loading: Numerical Simulations and Parametric Study

2016-07-20
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| Categories: Bridge Design/Const., Bridge Pres. Apps., New Technology, News, Studies / Reports

The Illinois Center for Transportation at the University of Illinois has released a report that presents numerical simulations evaluating the behavior of Integral abutment bridges with composite steel I-girders subjected to temperature changes consistent with seasonal fluctuations. Read the Report

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Georgia, South Carolina Enter Partnership to Replace I-20 Bridges, Add Lanes

2016-07-18
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, Legislative / Political, New Technology, News

AASHTO Journal, 15 July 2016 Georgia Gov. Nathan Deal and South Carolina Gov. Nikki Haley jointly announced a partnership to share costs of an estimated $75 million project to replace Interstate 20 bridges over the Savannah River and the Augusta Canal, and to widen a portion of I-20 around the border. Georgia Department of Transportation Commissioner Russell McMurry and…

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Calibration of Region Specific Gates Pile Driving Formula for Load and Resistance Factor Design

2016-07-15
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, New Technology, News, Studies / Reports

The Louisiana Department of Transportation and Development has released a report that proposes new bridge pile driving formulas for pile capacity verification by using pile driving blow counts obtained at either end-of-initial driving or at the beginning-of-restrike. Read the Report

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Bidirectional-Ductile End Diaphragms for Seismic Performance and Substructure Protection

2016-07-06
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, Journals/Publications, New Technology, News, Studies / Reports

  TRB’s Innovations Deserving Exploratory Analysis (IDEA) Highway Project 172: Bidirectional-Ductile End Diaphragms for Seismic Performance and Substructure Protection explores the applications of ductile diaphragms for use as a seismic-resistance solution for short and medium span steel bridges in all seismic regions. The research focused on applications for new bridge design, but the information could be applied to existing…

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Strengthening Existing Continuous Non-Composite Steel Girder Bridges Using Post-Installed Shear Connectors

2016-06-23
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, New Technology, News, Studies / Reports

The Center for Transportation Research at the University of Texas at Austin has released a report that investigates the use of post-installed shear connectors for strengthening non-composite continuous steel girder bridges that have strength deficiencies in the positive and the negative moment regions. Read the Report

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New state transportation program approved, paving way for Rappahannock River Crossing

2016-06-16
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, Legislative / Political, New Technology, News

Fredericksburg Free Lance-Star, 14 June 2016 Scott Shenk     The state’s new prioritization program became official Tuesday—and so did more than $200 million in funding for projects across the Fredericksburg region. After the Commonwealth Transportation Board (CTB) voted on the measure Tuesday in Richmond, state Transportation Secretary Aubrey Layne took a moment to say the group had…

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Improved Testing Methods for Bridge Decks and Tunnel Linings

2016-06-09
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| Categories: Bridge Design/Const., Bridge Pres. Apps., General News, New Technology, News, Studies / Reports

New nondestructive testing technologies are available to help transportation agencies inspect concrete bridge decks or tunnel linings more quickly and comprehensively. Information about Nondestructive Testing for Concrete Bridge Decks and Tunnel Linings (R06 A/G) is now available on the SHRP2 website. The Nondestructive Testing for Concrete Bridge Decks and Tunnel Linings web page features everything from PowerPoint presentations and…

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