Weight watcher
Roads & Bridges
May 2008
By Danielle D. Kleinhans, PH.D., P.E.
Monitoring system on Huey P. Long Bridge will track load transfer
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The spread defense
Roads & Bridges
March 2008
By Jerry Byrne
Crews save significant time and maintenance costs with overlay in Kansas
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All those opposed
Roads & Bridges
December 2007
By Bill Wilson
Majority of Roads & Bridges readers are not satisfied with leadership in Washington, D.C.
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Doctor’s orders
Roads & Bridges
November 2007
By Bart Gordon
Committee chairman: Bridges need high-tech checkups
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A troubled bridge over water
Roads & Bridges
November 2007
By Dan McNichol
After I-35W disaster, Minnesota and the U.S. try to sort out problems with their bridge systems
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Boon or Boondoggle?
Roads & Bridges
November 2007
By Peter J. Venderzee
FHWA’s Long Term Bridge Performance program has the makings of a champion
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Fail-Safe?
Roads & Bridges
November 2007
By Lou Dzierzak
Minnesota rushes to the aid of other bridges to reassure public after collapse of I-35W
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Arches have no rivals
Roads & Bridges
September 2007
By Wayne F. Lorenz, P.E., and Phillip J. Wolfram
Unique Roman bridges offer clues as to how it was done centuries ago
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History in the remaking
Infrastrucure Security 2005
October 2005
Sherif Morcos, Ph.D, P.E.
Seismic analysis and retrofit of historic arch bridges involves a thorough understanding of their structural behavior.
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Manufacturers may not make it
Roads & Bridges
June 2005
By William M. Wilkins
While Indiana’s roads and bridges still provide motorists with a high level of mobility, it is urgent that improvements be made now to accommodate future travel needs.
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Shining through
Roads & Bridges
November 2004
Corrina Stellitano, Contributing Author
“There had been a bridge inspection just two months earlier and this crack was not discovered.”
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Plastics charge
Roads & Bridges
August 2004
John E. Shea and Lew Koflowitz, Contributing Authors
It is because of FRP’s light weight, durability and resistance to fatigue, stress and corrosion that it is receiving increased scrutiny from the marketplace.
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Trembling dice
Roads & Bridges
May 2004
Allen Zeyher, Associate Editor
REDARS (for Risks from Earthquake DAmage to Roadway Systems) is software being designed to offer seismic risk analysis.
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Lasting line of defense
Roads & Bridges
March 2004
William Earley, Contributing Author
High-performance prepackaged grouts have been formulated that offer state-of-the-art protection for stressed and steel tendons, as well as many other desirable qualities.
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Drilling inside a mouth
Roads & Bridges
November 2003
Larry Trojak, Contributing Author
The Golden Gate Bridge is undergoing a three-phase renovation to meet seismic requirements. That upgrade will allow it to retain its structural integrity through a quake measuring 8.3 on the Richter scale. For Drill Tech Drilling & Shoring Inc., Antioch, Calif., drilling subcontractor, that meant having to deal with low overhead clearances during its retrofit of the south approach--a challenge that was met through the use of a drilling unit made for just such situations.
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King Kong finds work
Roads & Bridges
October 2003
Rodney Garrett
The engineering firm Hardesty & Hanover LLP, headquartered in New York City, is heading the design and details of the bridge rehabilitation project for the NYCDOT. For building the new poured-in-place concrete piers, it was decided by Hardesty & Hanover that the drilled shaft method be used. One of the pieces is the APE King Kong model 400 hydraulically operated vibratory hammer with a patented clamping system used for large-diameter caissons. It is o
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The bridge of the future: FHWA Bridge Plan Part II
Roads & Bridges
July 2003
Steven B. Chase, Contributing Author
In the first article in this three-part series, John Hooks introduced the concept of Bridges for the 21st Century, a comprehensive research and technology (R&T) program proposed by Federal Highway Administration (FHWA) to identify and deploy cutting-edge solutions to strengthen the bridge infrastructure. Intent on getting ahead of the bridge deterioration curve, FHWA has outlined an R&T strategy to develop the Bridge of the Future, a new generation of cost-effective, high-performance and low-maintenance bridges.
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Holding it together: FHWA Bridge Plan Part I
Roads & Bridges
June 2003
John M. Hooks, Contributing Author
The first in a three-part series, this article describes the Federal Highway Administration's (FHWA) proposed strategy for inventorying and preserving the current stock of bridges in the U.S.for inventorying and preserving the current stock of bridges in the U.S.
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Lightweight Challenges Heavyweight
Roads & Bridges
May 2003
Paul Hohensee, Contributing Author
Steel reigned supreme as the basic material of jack construction until about a decade ago, when aluminum cylinders appeared on the scene. Jacks have followed the same pattern as beverage cans and cars. First, aluminum was introduced as a replacement for steel. After that, attention was devoted to reducing bulk and cutting more weight. Computerized design, finite element analysis and modern alloys have made quite a difference.
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A Patch for Jacket Weather
Roads & Bridges
May 2003
A novel cementing solution is needed to address the specific problems related to cold climate applications. During the last 10 years, Argonne National Laboratory, Argonne, Ill., has been developing Ceramicrete, a phosphate-based cement that may provide a solution to these cold climate problems. This cement was originally developed for encapsulating nuclear waste, and now is becoming a sensible option for DOTs across the midwest and northern U.S.
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Time to Wrap
Roads & Bridges
May 2003
David White, P.E., and Scott Isaac, Contributing Authors
Twenty-five deteriorated bridges along a 5-mile corridor of I-80 in Salt Lake City were in need of major repair. None of the bridges met current seismic design standards. Ultimately, it was decided to use simple, low-cost techniques, including carbon fiber reinforced polymer (CFRP) fabrics and other structural repairs that could reduce the severity of damage from an earthquake.
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Picking up a station
Roads & Bridges
June 2002
Peter Pomeranz, P.E., and Joseph Faro, P.E.
The Kosciuszko Bridge, a steel and concrete structure approximately 4,000 ft in length, connects the boroughs of Queens and Brooklyn. The NYSDOT awarded a contract to Ahern Painting Contractors Inc. to clean, paint and replace steel on the bridge. About 10 months after work began, the painters complained about electrical shocks whenever they touched the steel on the bridge while standing on a man lift.
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Cal-Poly coatings
Roads & Bridges
February 2002
Frank Limas, Dave Harris and Tripp Ishmael
A project to widen the San Mateo Bridge over California’s San Francisco Bay could guide future transformations of 20th century bridge spans to handle the traffic volumes of the 21st century. And it could demonstrate how advanced elastomeric coating technologies can be employed to waterproof precast concrete and protect it against corrosion.
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Working for keeps
Roads & Bridges
November 2001
Allen G. Davis
To save or not to save is often the question facing owners of historic reinforced concrete bridges built in the first half of the 20th century. For decades, most have been subjected to much heavier traffic than their original designers ever imagined, not to mention the wear and tear of weather and deicing salts.
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FHWA invests in high-tech bridges
Roads & Bridges
November 2001
John M. Hooks
FHWA program looks to use innovative materials to improve service life and reduce service cost for bridges.
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Watching paint dry
Roads & Bridges
November 2001
Barry Couts
Why bother to pay for certified independent inspection of bridge painting projects when the contractor offers to provide inspectors at no additional charge?
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Stop chipping away
Roads & Bridges
November 2001
Richard Yach
Crews work to remove paint as part of a $25 million rehab bridge project in New Orleans
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Know what you're digging into
Roads & Bridges
August 2001
Steve Wendland, P.E.
Geotechnical subsurface analysis for bridge projects could help prevent future disasters
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Drilled into their head
Roads & Bridges
November 2000
Sybil E. Hatch, P.E.
Years of research has convinced state DOTs of the benefits of drilled shafts
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Showing fancy foot work
Roads & Bridges
November 2000
William Herndon
Impressive, precise maneuvers used to strengthen Golden Gate Bridge foundation
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Fighting off bottom feeders
Roads & Bridges
November 2000
Michael J. Ganas, P.E.
Three tests could help detect underwater bridge deterioration
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BRIDGES 2000
Roads & Bridges
June 2000
Tim Gregorski
Pennsylvania Department of Transportation (PennDOT) has a problem. It has hundreds of bridges and overpasses that need to be inspected every two years, some even more frequently.
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A Wilson with one important point
Roads & Bridges
November 1999
by Bill Wilson
Centered around the idea of ‘V’-shaped piers, the Parsons Transportation Group wins unanimous approval for the design of the second Woodrow Wilson Memorial Bridge
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Bridge over troubled water
Roads & Bridges
August 1999
by Bill Wilson
Standing up to the forces of nature, Confederation Bridge wins 1999 George S. Richardson Medal for single, recent outstanding achievement in bridge construction
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Stealth technology visible in bridges
Roads & Bridges
November 1998
by Jerome S. O’Connor, P.E.
New York State DOT demo projects endeavor to find whether fiber-reinforced polymer composites hold promise for repair of bridges; lower labor costs help off set higher initial cost
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Thirtysomething bridge gets a new life
Roads & Bridges
November 1996
Public involvement and community partnering aid in the reconstruction and widening of the John A. Blatnik Memorial Bridge linking Minnesota and Wisconsin
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New York tops list of states whose bridges are most in need of repair
Roads & Bridges
November 1996
New York tops the list of states whose bridges are in the worst condition, according to the American Automobile Association (AAA) and the Federal Highway Administration (FHWA). AAA ranked the states and Washington, D.C., according to the percentage of their bridges rated structurally deficient or functionally obsolete by the FHWA.
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A study in lead
Roads & Bridges
November 1996
James Valenti, P.E.
Effective controls are employed to remove lead paint from the Williamsburg Bridge main cable system without using abrasive blasting technologies
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Bend but don't break
Roads & Bridges
August 1996
A unique 'multidisciplinary approach' is used to secure Portland's Marquam Bridge against the onslaught of a design maximum expected earthquake
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