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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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    <item>
      <title>TENSILE PROPERTIES OF GEOGRIDS UNDER CYCLIC LOADINGS. TECHNICAL NOTE</title>
      <link>https://trid.trb.org/View/635884</link>
      <description><![CDATA[The tensile behavior of three commonly used polymeric geogrids (polypropylene, polyester, and high-density polyethylene) under cyclic loading was investigated.  The tests were strain controlled and were conducted for 100 cycles at different load ratios.  The stiffness and damping ratio of geogrids at all load cycles were compared with the primary loading curve.  The stiffness increased while the damping ratio decreased with more loading cycles at any load ratio.  A higher load ratio decreased the stiffness ratio and increased the damping ratio.  The strengths of prestressed and virgin specimens were also compared. Negligible strength reduction resulted from short-term cyclic loading.  The strength obtained from static tests appears reasonable when used for design considering short-term cyclic loading.  An empirical relationship is proposed to determine the strain accumulated from cyclic loading under different load ratios.]]></description>
      <pubDate>Sat, 19 Sep 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/635884</guid>
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    <item>
      <title>TIMBER BRIDGES IN SOUTH AMERICA</title>
      <link>https://trid.trb.org/View/482206</link>
      <description><![CDATA[Timber bridges in South America predate the 19th century.  This paper provides an introduction of the many types of timber bridges currently used in South America.  The five basic types used, which are, the longitudinal beam, frame, truss, arch and suspension superstructures, are presented.  Research on new bridge designs using tropical and reforestation wood species, has been developed in the Laboratory of Wood and Timber Structures, Sao Paolo University in Brazil, on prestressed timber bridges and decks composed with two diagonal layers of sawn wood connected with wood dowels over composed longitudinal beams.  The first prestressed timber bridge in South Ameria will be constructed this year using Eucalyptus Citiodora specie.]]></description>
      <pubDate>Wed, 02 Apr 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/482206</guid>
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      <title>PRESTRESSED GLUED-LAMINATED TIMBER BEAM--PILOT STUDY</title>
      <link>https://trid.trb.org/View/481718</link>
      <description><![CDATA[The performance of glued-laminated (glulam) timber beams may be improved by the addition of high-performance fibers between the laminations. The contribution of the fibers is further enhanced if they are pretensioned prior to incorporation into the glued-laminated beam. This research indicates that both strength and stiffness are increased by using small volumes of pretensioned Kevlar yarns. The research explores the bond, development, and adhesive performance associated with the prestressing operations.]]></description>
      <pubDate>Wed, 26 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/481718</guid>
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    <item>
      <title>MONITORING PRESTRESSED STRUCTURES</title>
      <link>https://trid.trb.org/View/470957</link>
      <description><![CDATA[Developments in remote-monitoring technology provide new options for cost-effective management of prestressed and post-tensioned reinforcement systems.  The new patented acoustic monitoring systems make it possible, by combining traditional and nondestructive testing, to monitor the performance of prestressed wires or tendons after installation. Improved monitoring and inspection capabilities can lead to cost savings by identifying damaged or corroded tendons.  This minimizes replacement costs, reduces the potential of failure and ensures structural integrity.]]></description>
      <pubDate>Mon, 24 Feb 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/470957</guid>
    </item>
    <item>
      <title>NONDESTRUCTIVE SEARCH FOR EXISTING PC CABLE IN SHINKANSEN ELEVATED TRACK</title>
      <link>https://trid.trb.org/View/464273</link>
      <description><![CDATA[A new elevated track has been built next to the existing Shinkansen track, and the two tracks were joined by adding prestress strength.  The PC cables had to pass through the existing Shinkansen track.  An examination of the methods of non-destructive search for the PC cables in the concrete, to avoid the existing PC cables, was made.  The use of these methods resulted in the whole process being successfully completed.]]></description>
      <pubDate>Mon, 16 Sep 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/464273</guid>
    </item>
    <item>
      <title>ANCIENT TECHNOLOGY CAN `BRIDGE' ACCESS GAP FOR THIRD WORLD COUNTRIES</title>
      <link>https://trid.trb.org/View/452807</link>
      <description><![CDATA[The use of suspended prestressed wooden elements for bridge structures offers an alternative to their steel and concrete counterparts.  These bridges are expected to carry tractor trailers and other heavy, multi-axle vehicles, as well as more common transportation modes and pedestrians.  This article reports that prestressed wooden bridges have not yet made the leap from conceptual design to actual construction; but, the design has enough merit to warrant detailed discussion. Discussions on bridge design and cost are included.]]></description>
      <pubDate>Fri, 05 Jan 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/452807</guid>
    </item>
    <item>
      <title>STRENGTHENING OF COMPOSITE STEEL-CONCRETE BRIDGES</title>
      <link>https://trid.trb.org/View/452426</link>
      <description><![CDATA[An effective procedure to strengthen composite steel-concrete girders in bridges and buildings is prestressing.  Many investigators have studied the behavior of this structural system under static loading, but fatigue behavior has not been examined. This paper analyzes and synthesizes fatigue test data for the main constituent components of prestressed composite steel-concrete girders--strands, shear studs, and cover plates. The data are compared with the requirements of the American Association of State Highway and Transportation Officials (AASHTO).  Based on the authors' investigation, end-anchored strands for nonbonded, prestressed structures can be designed for fatigue to the AASHTO allowable stress range for composite girders.  A companion paper presents the fatigue behavior of these elements within a prestressed composite girder.]]></description>
      <pubDate>Wed, 27 Dec 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/452426</guid>
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    <item>
      <title>PESEES DES REACTIONS D'APPUI. (WEIGHING OF BRIDGE BEARING REACTION</title>
      <link>https://trid.trb.org/View/211500</link>
      <description><![CDATA[For the surveillance and maintenance of structures, notably prestressed concrete bridges, it is important to know the evolution of bridge bearing reactions over a period of time (t = 0 when the construction has been completed, t = 1 year, t = 5 years, t = 10 years).  A continuous recording device allowing free dilation of the deck without the introduction of undesirable stresses in the measuring cells has been developed that improves the performance of the test.  A secondary standard called the "three-point balance" has been built for the specific requirements of this test.  It constitutes the indispensable reference and ensures the reliability of the system for measurements of very long duration (5 to 10 years).  This technique of measurement can find various applications apart from the field of prestressed segmental precast concrete decks.]]></description>
      <pubDate>Fri, 31 May 1985 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/211500</guid>
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    <item>
      <title>SEGMENTAL BOX GIRDERS FOR THE HIGH LEVEL WEST SEATTLE BRIDGE</title>
      <link>https://trid.trb.org/View/210646</link>
      <description><![CDATA[Rising 150 ft over the Duwamish River in the State of Washington, the recently completed main span of the West Seattle Bridge is an excellent example of efficient use of prestressed concrete for a long-span structure.  This article presents highlights of the structure's design and construction.  Subjects covered include design criteria, construction sequence, prestressing system, corrosion protection, and others.]]></description>
      <pubDate>Wed, 30 Jan 1985 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/210646</guid>
    </item>
    <item>
      <title>FIVE BRIDGES, VIADUCT CAPTURE PCI AWARDS</title>
      <link>https://trid.trb.org/View/204459</link>
      <description><![CDATA[Five bridges and a viaduct were winners in the 21st annual awards program of the Prestressed Concrete Institute; seven other winning structures were profiled in Concrete's February issue.  Winners were selected on a basis of achievements in esthetic expression, function, and economy in the use of precast and prestressed concrete.]]></description>
      <pubDate>Fri, 28 Sep 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/204459</guid>
    </item>
    <item>
      <title>PRESTRESSED STEEL BRIDGE A WINNER</title>
      <link>https://trid.trb.org/View/203464</link>
      <description><![CDATA[A cable-stressed plate girder bridge that saved Idaho 20% on steel tonnage compared with a conventional design and brought a low bid 20% under estimate is also providing a winner for the contractor.  The cable-stressed steel design by T.  Y.  Lin International, San Francisco, was commissioned by the Idaho Department of Transportation (IDOT), working with the Federal Highway Administration in an attempt to make steel more competitive with concrete. The weight of the steel is cut from the usual 30 to 24 psf. And the layout, with just four girders and deck overhangs of 8 ft rather than the conventional 2 one-half to 3 ft, also permits a cost-saving slimming of the piers and narrowing of their hammerhead caps.]]></description>
      <pubDate>Thu, 28 Jun 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/203464</guid>
    </item>
    <item>
      <title>STEEL BEATS CONCRETE FOR IDAHO BRIDGE</title>
      <link>https://trid.trb.org/View/196984</link>
      <description><![CDATA[The state of Idaho and the Federal Highway Administration encouraged the cable-stressed steel girder for Bonners Ferry Bridge as an alternative to a prestressed concrete design. T.  Y.  Lin International designed the cable-stressed structure to replace a steel bridge constucted in 1933 across Northern Idaho's Kootenay River.  All eight contractors bid the cable-stressed steeld design, decidedly the cheapest alternative.  The steel plate girders with spans varying from 100 ft-155 ft required two stages of cable stressing in negative moment regions.  Since the deck is attached to the steel girder by shear connectors and is always in compression, fully composite action over the entire length of the bridge, including positive and negative moment areas, is achieved.  The four-lane bridge is 1,378 ft long between expansion joints.  The design required only two expansion joints, one on each end.]]></description>
      <pubDate>Wed, 29 Feb 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/196984</guid>
    </item>
    <item>
      <title>I-205 COLUMBIA RIVER BRIDGE: DESIGN AND CONSTRUCTION</title>
      <link>https://trid.trb.org/View/174409</link>
      <description><![CDATA[The I-205 Columbia River Bridge is the final link in a forty-mile circumferential highway east of Portland, Oregon and Vancouver, Washington.  It is one of the largest single projects using prestressed post-tensioned concrete box girders in the United States today.  Concepts for the structure were defined in a type study which compared construction cost, maintenance cost, constructability, and aesthetics of various alternatives.  Continuously post-tensioned box girders constructed on falsework and precast segmental box girders (free cantilever erection) are used in the 7,500-ft-long (2286 m) dual structures.  Each of the structures is 68 ft (20.7 m) wide.  River piers of cofferdam, caisson, segmental precast-concrete shell construction techniques were developed for various applicable locations.  Construction, presently underway, is expected to be completed in 1982.]]></description>
      <pubDate>Fri, 30 Jul 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/174409</guid>
    </item>
    <item>
      <title>KENTUCKY RIVER BRIDGE - VARIABLE DEPTH PRECAST PRESTRESSED SEGMENTAL CONCRETE STRUCTURE</title>
      <link>https://trid.trb.org/View/179680</link>
      <description><![CDATA[The paper describes the preliminary studies, alternate structure schemes, superstructure design, post-tensioning layout, epoxy joint details, segment production and erection of the Kentucky River Bridge - a variable depth precast prestressed segmental structure, with a 98.5 m center span in which the segments were fabricated using the long-line casting method.]]></description>
      <pubDate>Fri, 28 May 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/179680</guid>
    </item>
    <item>
      <title>STEEL-PACKED CONCRETE BRIDGE BOASTS LOAD-CARRYING MUSCLE</title>
      <link>https://trid.trb.org/View/160163</link>
      <description><![CDATA[A concrete box girder bridge under construction in Vienna that has an unusually large amount of prestressing and reinforcing steel to handle heavy loads while meeting strict esthetic requirements is described.  The Danube River structure will have six traffic lanes on top and carry a rail transit track in each of its two cells.  The 2,800-ft structure is fully prestressed longitudinally and vertically, and is prestressed to a lesser degree in its top and bottom flanges.]]></description>
      <pubDate>Tue, 30 Dec 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/160163</guid>
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