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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>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
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    <item>
      <title>APPLICATION OF SUCTION PILES AS ANCHORS FOR FLOATING PRODUCTION PLATFORMS IN DEEP WATER AT CAMPOS BASIN</title>
      <link>https://trid.trb.org/View/476522</link>
      <description><![CDATA[In 1984, Petrobras discovered the giant oil fields at the Campos Basin, the major oil production district of Brazil located in the State of Rio de Janeiro.  The oil reservoirs are located in water depths between 400 and 2500 m (1333 to 8333 ft).  To exploit oil at such water depths, Petrobras developed the technology of Floating Production Platforms associated with the application of flexible risers.  Mooring lines and anchors keep these floating units in place.  To reduce the anchoring radius, Petrobras introduced a new concept: taut leg mooring lines using polyester fiber rope.  The vertical load components at the anchor position require the application of piles.  Due to the water depth, the piles are suction driven by use of the water column. This paper covers the application of numerical modeling in order to study the behavior of such piles during suction driving and in operation under the environmental loads imposed by the floating platforms.]]></description>
      <pubDate>Thu, 05 Mar 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/476522</guid>
    </item>
    <item>
      <title>MULTILATERAL CASING-EXIT TECHNOLOGY ELIMINATES FLOATING RIG HEAVE</title>
      <link>https://trid.trb.org/View/577228</link>
      <description><![CDATA[The first-ever multilateral casing exit from a semi-submersible used an innovative rate of penetration control (ROPC) tool to neutralize vessel heave. This tool was pivotal in milling through the casing and liner positioned at the juncture of a multibranched well, and was instrumental in reestablishing contact with the main well bore. Until recently, these types of operations were ill-suited for floating rigs because of wave-induced heave.]]></description>
      <pubDate>Tue, 21 Oct 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/577228</guid>
    </item>
    <item>
      <title>STATIC AND DYNAMIC STABILITY</title>
      <link>https://trid.trb.org/View/166397</link>
      <description><![CDATA[A simplified discussion is presented of a practical stability rule often used for "ship-like" and semisubmersible offshore units.  The rule is based on curves of dynamic stability taking downflooding angle, righting moment and wind inclining moment into consideration.  The effect of waves is discussed.  Order from NSFI as No. 22142.]]></description>
      <pubDate>Thu, 21 May 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/166397</guid>
    </item>
    <item>
      <title>ANALYTICAL APPROACH TO THE DESIGN OF A TENSION LEG PLATFORM</title>
      <link>https://trid.trb.org/View/166110</link>
      <description><![CDATA[The costs of Tension Leg Platform systems can be justified for use in the deep water reservoirs which are currently attracting attention because, at the water depths being considered, TLP's are less expensive than alternative structures.  The results of a comparative study done by Daily, Karsan and Kypke compares the qualitative cost between conventional fixed structures, Guyed Towers and Tension Leg Platforms.  The cost comparison crossover points for the offshore structure alternatives depend on environmental factors as well as water depth.  The severity of the sea environment, seabed conditions and topography, possible seismic activity, projected life of the field and desireability of platform reuse are all cost factors.  In general, the cost crossover points move to the left, i.e. to shallower water depths, with an increase in degree of any of the environmental variables other than water depth.  The design features for the TLP are common to all offshore structures.  The particular platform configuration will depend on the design approach, or the analytical considerations and techniques selected.  The design system presented here utilizes methods which consider slow varying drift force and high oscillatory first-order wave forces so that the impact of the large structural components of the TLP are incorporated in the analyses of its motion and stationkeeping capability.  Final selection of structural geometry utilizes an optimization procedure which includes an economical evaluation of the design process.]]></description>
      <pubDate>Wed, 15 Apr 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/166110</guid>
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    <item>
      <title>OSFLAG 8-SUMMARY REPORT ON THE WORK DONE AT GLASGOW UNIVERSITY ON THE STABILITY OF SEMISUBMERSIBLES</title>
      <link>https://trid.trb.org/View/163212</link>
      <description><![CDATA[The broad conclusions of the investigation are that the present rules governing stability make the chance of a capsize condition developing very improbable, but that they are only just conservative and cannot be relaxed at present. If they are relaxed, trouble will be experienced with a tilt phenomenon which is not completely understood, but which is a very real experimental occurrence.  A number of recommendations are made about further work on this subject. Order from BSRA as No. 54,654.]]></description>
      <pubDate>Thu, 12 Mar 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/163212</guid>
    </item>
    <item>
      <title>DEVELOPMENT OF AN ASP (AIR STABILIZED PLATFORM)</title>
      <link>https://trid.trb.org/View/162439</link>
      <description><![CDATA[The concept of a novel type of platform was developed, which was termed "Air Stabilized Platform" or "ASP" for short. The effect of the compressibility of air was given in terms of an "Air Pocket Factor-f sub air." Functional relationships for f sub air with respect to internal draft of the airpocket and its geometry are developed. Several generic platform designs based on the ASP concept were designed and model tested. The results are compared with analytical results. The platforms were moored by spread mooring, tension leg mooring or were free floating. Finally realistic applications of the ASP as support platforms for floating industrial plants were considered.]]></description>
      <pubDate>Wed, 18 Feb 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/162439</guid>
    </item>
    <item>
      <title>THE POSITIONING OF OFFSHORE CONSTRUCTIONS, RESEARCH AND TRAINING BY SIMULATION</title>
      <link>https://trid.trb.org/View/156169</link>
      <description><![CDATA[In 1976, two research programs concerning the positioning of offshore gravity platforms were carried out on the ship manoeuvring simulator of the N.S.M.B. for Smit International Marine Services B.V., which specializes in the towage and positioning of offshore constructions like the Ekofisk 1 and Mobil Beryl "A" units.  The results and the consequent recommendations have meanwhile been applied by Smit International in the organization and execution of serveral positioning operations.  The "tug order display", designed by the Netherlands Ship Model Basin to give the towmaster a view of all standing tug orders has also been used for instance in towing the ANDOC-built Dunlin-platform out of Euro-poort.]]></description>
      <pubDate>Wed, 08 Oct 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/156169</guid>
    </item>
    <item>
      <title>STANDARDIZATION TRIALS OF THE STABLE SEMISUBMERGED PLATFORM, SSP KAIMALINO, WITH A MODIFIED BUOYANCY CONFIGURATION</title>
      <link>https://trid.trb.org/View/150847</link>
      <description><![CDATA[This report contains the results of heavy, medium, and light displacements standardization trials conducted on the Stable Semisubmerged Platform (SSP) KAIMALINO in a new buoyancy module configuration. Measurements of shaft rpm, shaft torque, ship speed, ship's heading, position of ship's control surfaces, ship's roll, ship's pitch, and relative wind velocity and direction were made throughout the speed range of 4.68 to 17.96 knots. A comparison of power characteristics of the old and the newly increased buoyancy configurations is presented. The new buoyancy scheme proved significantly superior below 13.2 knots and less desirable above that speed. Comparisons are made between the ship's automatic control system and a fixed control surfaces condition. No significant powering changes were noted. Comparisons between different nominal trim conditions were made which produced modest differences. Calm and nominally rough water trials were also compared and the effects of the sea state on powering characteristics was found to be minimal. (Author)]]></description>
      <pubDate>Wed, 27 Aug 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/150847</guid>
    </item>
    <item>
      <title>PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON THE BEHAVIOR OF OFFSHORE STRUCTURES</title>
      <link>https://trid.trb.org/View/152172</link>
      <description><![CDATA[BOSS '79 is concerned with waves, currents and fluid loading, the statics and dynamics of structures, material properties and behaviour, soil mechanics and foundation engineering, and the important interactions between these disciplines.  The conference used an interdisciplinary approach, and covers both fundamental research and the experience gained in applying results to the behaviour of fixed and floating structures in exposed offshore areas. (Author)]]></description>
      <pubDate>Mon, 09 Jun 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/152172</guid>
    </item>
    <item>
      <title>A STUDY OF THE INFLUENCE OF LIQUID TANKS ON THE EARTHQUAKE RESPONSE OF OFFSHORE PLATFORMS</title>
      <link>https://trid.trb.org/View/149455</link>
      <description><![CDATA[An investigation of liquid storage tanks effects on the dynamic characteristics of fixed offshore platforms is conducted using random vibration theory.  The liquid sloshing is represent by an infinite series of masses, springs and linear dampers.  The equivalent mechanical model of sloshing is then combined with a multi degree of freedom lumped mass structural model of an hypotetical 200 meter platform.  The effect of sloshing on natural frequencies and mode shapes is evaluated.  Changes in system response to earthquake excitation are examined as tanks geometry is varied.  The possibility of using liquid storage tanks as dynamic absorbers is also investigated.]]></description>
      <pubDate>Wed, 07 May 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/149455</guid>
    </item>
    <item>
      <title>A RATIONAL APPROACH TO THE DESIGN OF A PIPELAY/DERRICK SEMISUBMERSIBLE BARGE</title>
      <link>https://trid.trb.org/View/143018</link>
      <description><![CDATA[An outline of a rational approach to the design of the semisubmersible in general and a pipelay/derrick semisubmersible in particular is presented.  The general steps for an optimal design of a semisubmersible barge are detailed and an optimization process recommended.  Basic vessel design steps are given from preliminary design through economic evaluation, using working days estimates for specific sea conditions, with an optimal process detailed as the core of the design evaluation. The method defines general standards based on existing semisubmersible design, specifications and operational data. The discussion and criteria are mostly confined to the pipelay/derrick semisubmersible barge, but the concept as presented here can be used in the optimal design of other semisubmersible vessels with appropriate adjustments of logic, constraints and decision parameters.  No attempt has been made to present the structural design in this work.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/143018</guid>
    </item>
    <item>
      <title>STATISTICS OF HURRICANE WAVES IN THE GULF OF MEXICO</title>
      <link>https://trid.trb.org/View/146924</link>
      <description><![CDATA[The maximum wave height that can reasonably be expected to affect a structure during its lifetime is one of the more critical factors influencing the design of an offshore structure.  By definition, such a wave height is a rare occurrence.  The estimation of future occurrences of such waves must reflect, and indeed be derived from, the past history of storm-wave occurrences.  This paper reports the results of an extensive study of hurricane-generated waves in the Gulf of Mexico.  The study includes hindcasting of historical hurricanes and statistical interpretation of the hindcast wave data to determine maximum wave heights throughout the OCS (Outer Continental Shelf) of the central and western Gulf of Mexico.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/146924</guid>
    </item>
    <item>
      <title>RELIABILITY ANALYSIS FORMAT FOR OFFSHORE STRUCTURES</title>
      <link>https://trid.trb.org/View/146926</link>
      <description><![CDATA[The reliability assessment of offshore platform structures depends on an understanding of complex environmental phenomena, such as storm and seismic loadings, and an accurate analysis of structural capacity.  An incremental loading approach to structural reliability analysis is presented and illustrated.  The structure is progressively "unzipped" as successive members reach their capacity, until overall structural collapse occurs.  The method accounts for different types of member behavior, different structural arrangements, and statistical and mechanical correlation between structural elements.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/146926</guid>
    </item>
    <item>
      <title>MOTION, FATIGUE, AND THE RELIABILITY CHARACTERISTICS OF A VERTICALLY MOORED PLATFORM</title>
      <link>https://trid.trb.org/View/146927</link>
      <description><![CDATA[As the search for hydrocarbons continues, offshore platforms are being installed in deeper and deeper water.  The vertically moored platform is a buoyant structure for deepwater drilling and production that uses tensioned vertical mooring risers integral with platform wells.  The dynamic response of the structure to wind, wave, and current is analyzed.  A model for relating environmental conditions to riser stresses is outlined.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/146927</guid>
    </item>
    <item>
      <title>VERTICALLY MOORED PLATFORM FOR DEEPWATER DRILLING AND PRODUCTION</title>
      <link>https://trid.trb.org/View/146928</link>
      <description><![CDATA[While the pace of development has not been as rapid as anticipated a few years ago, the oil industry clearly is moving ahead with exploration and production in deepwater offshore areas.  In this article, the general configuration, motion characteristics, and basic design principles of the vertically moored platform (VMP) are described.  Two example designs are presented with a description of fabrication and installation; cost estimates also are presented.  The VMP is a feasible and practical structure for developing deepwater fields and has distinct structural and operational advantages.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/146928</guid>
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