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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <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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      <title>COMPORTEMENTS RHEOLOGIQUES ET STRUCTURE DES MATERIAUX - 15E COLLOQUE ANNUEL DU GROUPE FRANCAIS DE RHEOLOGIE - PARIS 3-4-5 DECEMBRE 1980</title>
      <link>https://trid.trb.org/View/1041007</link>
      <description><![CDATA[CE NUMERO SPECIAL TIENT LIEU DE COMPTE RENDU DU 15E COLLOQUE ANNUEL DU GROUPE FRANCAIS DE RHEOLOGIE, TENU A PARIS LES 3-4 ET 5 DECEMBRE 1980.  LES TEXTES ONT ETE REUNIS PAR HUET,C ET ZAOUI,A.  JEAN MANDEL, DANS SA PREFACE, MET EN EVIDENCE LES DIFFICULTES QUE COMPORTENT LES CHANGEMENTS D'ECHELLE  (ATOME, MOLECULE, FIBRE, CRISTAL, ECHANTILLON) ET LES DIVERSES APPROCHES  POUR TENTER DE MAITRISER LES LOIS DES COMPORTEMENTS RHEOLOGIQUES.  LES 21 COMMUNICATIONS ONT ETE PRESENTEES AU COURS DES 5 SESSIONS.  (VOIR FICHES  DIRR 114400 A 114407).  (INV.16662-DOC.BIBL - INV.16471-M.DOAN TU HO-CHAUSS.PMC).]]></description>
      <pubDate>Sat, 20 Nov 2010 20:06:35 GMT</pubDate>
      <guid>https://trid.trb.org/View/1041007</guid>
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      <title>TESTS ON THE REDISTRIBUTION OF FORCES IN STATICALLY INDETERMINATE PRESTRESSED CONCRETE STRUCTURES UNDER THE EFFECT OF CONCRETE CREEP</title>
      <link>https://trid.trb.org/View/58905</link>
      <description><![CDATA[Small rectangular concrete beams, with a prestressing cable at the centre of their transverse sections, were tested under long-term loads and with different types of bearing: a) statically determinate beams uniformly loaded, B) uniformly loaded beams supported on three equally spaced bearings; C) beams, which are initially simply supported at their two extremities and then receive additional support in the middle; D) beams with a circular deflection in the middle.  The deflections, the local deformations, supports were measured.  It was found that the value of creep deformations is smaller than predicted in the fip/ceb recommendations.  The influence of the age of load application is fully stressed in these recommendations. The transverse sections remain plane, the variations in the statically indeterminate bearing pressure in beams "C" can be calculated from the variations in the deflections of beams "a", by means of the linear creep theory, which is valid for the interpretation of the tests. /TRRL/]]></description>
      <pubDate>Thu, 18 May 1978 00:00:00 GMT</pubDate>
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      <title>INFLUENCE OF THE PASTE AND AGGREGATE RESPECTIVELY ON THE MEASURED RHEOLOGICAL CHARACTERISTICS OF FRESH VIBRATED CONCRETE</title>
      <link>https://trid.trb.org/View/58864</link>
      <description><![CDATA[The exclusively viscous behaviour of pure cement paste subjected to vibration can be determined by classical viscometric methods.  In this communication the authors have sought to determine the effect on these measurements, of the presence of aggregates exceeding 100 microns in size.  For this purpose they have established laws which govern the effect of the addition of aggregates on the viscosity of pure cement paste.  It is shown in particular that the presence of aggregates in a pure paste tends to produce a mixture which less and less satisfies the conditions necessary for viscometric measurements, as the concentration and size of the aggregates increase.  In a wider sense, it is stated that it is not possible to speak of a possible viscosity of concrete, and consequently that it is futile to attempt to carry out viscometric measurements on this material.  /TRRL/]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/58864</guid>
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      <title>CONTRIBUTION TO THE STUDY OF LOSS OF PRESTRESS THROUGH COMBINED CREEP-RELAXATION IN PRESTRESSED CONCRETE MEMBERS</title>
      <link>https://trid.trb.org/View/25901</link>
      <description><![CDATA[THE METHOD OF COMUMLATION OF LOSSES CAUSED BY THE SHRINKAGE AND CREEP OF CONCRETE AND STEEL RELAXATION, WHICH IS USED IN PRESENT TECHNICAL SPECIFICATIONS TO DETERMINE THE TOTAL DIFFERED LOSS OF PRESTRESS, LEADS TO AN OVERESTIMATION OF THE LATTER.  THE APPLICATION OF RHEOLOGY TO THE STUDY OF THIS PROBLEM PERMITS A REDUCTION IN THIS OVERESTIMATION. DETAILS ARE GIVEN OF A NEW TYPE OF EXPERIMENTAL EQUIPMENT DESIGNED TO CONTROL PURE CREEP PHENOMENA IN CONCRETE, PURE RELAXATION PHENOMENA IN STEEL, AND COMBINED CREEP-RELAXATION PHENOMENA.  THE RESULTS PRESENTED HERE CONCERN (1) THE INFLUENCE OF THE INITIAL STRESSES IN CONCRETE AND STEEL AND THE RELATION BETWEEN THESE STRESSES AND THE EVOLUTION OF OF THE STATE OF STRESS IN AND DEFORMATION OF MATERIALS IN THE PRESTRESSED MEMBER, (2) THE EVALUATION OF THE OVERESTIMATION OF LOSS OF PRESTRESS CALCULATED BY MEANS THE METHOD OF LOSS CIRCULATION, AND (3) THE COMPARISON BETWEEN PURE CREEP AND RELAXATION PHENOMENA (CONSTANT IMPOSED STRESS AND DEFORMATION) AND COMBINED CREEP AND RELAXATION PHENOMENA (VARIABLE STRESS AND DEFORMATION).  A COMPARISON IS MADE BETWEEN THEORETICAL AND EXPERIMENTAL RESULTS.]]></description>
      <pubDate>Thu, 27 Feb 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/25901</guid>
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      <title>INFLUENCE OF PRESSURE ON THE RHEOLOGICAL BEHAVIOUR OF ROCKS</title>
      <link>https://trid.trb.org/View/25903</link>
      <description><![CDATA[IT IS SHOWN HOW, UNDER THE EFFECT OF INCREASING STRESSES AND TEMPERATURES, ROCKS GO FROM THE BRITTLE TO THE PLASTIC STATE: A DENSE LIMESTONE IS USED AS AN EXAMPLE FOR WHICH THREE STATES ARE DEFINED: BRITTLENESS, PSEUDO-PLASTICITY, PLASTICITY, THE SECOND BEING CHARACTERISED BY SLIDING AT PARTICLE JOINTS.  THE LIMITS BETWEEN THESE STATES ARE CLEARLY DEFINED IN SPACE (MAIN STRESSES, TEMPERATURE).]]></description>
      <pubDate>Thu, 27 Feb 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/25903</guid>
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