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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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      <title>MULTIAXIAL TESTING OF SUBGRADE</title>
      <link>https://trid.trb.org/View/352773</link>
      <description><![CDATA[A unique testing apparatus consisting of a low-pressure multiaxial device has been applied to resilient testing of subgrade soil.  Tests were conducted by applying dynamic loading under constant confining pressure.  Soils from seven Ohio sites were evaluated.  Laboratory results indicate that resilient behavior of the subgrade was dependent on moisture content, stress level, soil type, and density.  Critical sensitivity of the resilient modulus to the moisture content was demonstrated by experiments.  The testing procedure and results are discussed.]]></description>
      <pubDate>Sun, 31 Mar 1991 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/352773</guid>
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      <title>LOAD TRANSFERS IN MULTI-AXLE PLATFORMS WITH GOOSENECK CONNECTIONS</title>
      <link>https://trid.trb.org/View/306372</link>
      <description><![CDATA[The transportation of overdimensional or overweight loads by road is often necessary, and has the potential to cause a lot more damage  to roads and bridges than normal trucks. This report presents the findings of an investigation into the load transfers in the platforms used to carry such loads.  Two load platforms were instrumented and driven over typical test circuits.  One of the platforms could be altered to different load sharing configurations.  It was found that the so-called 'two point' configuration had the best load transfer characteristics--given the lowest dynamic loads to the road surface and to the towing vehicle.  A 'compensating gooseneck' configuration was also tested, also giving favorable load transfer characteristics.  As a result of this test program, we are in the position to recommend the use of Two Point and Compensating Gooseneck load platforms for the transfer of indivisible loads.]]></description>
      <pubDate>Tue, 31 Jul 1990 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/306372</guid>
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      <title>CONSTITUTIVE MODELING INCLUDING MULTIAXIAL TESTING FOR PLAIN CONCRETE UNDER LOW-CONFINING PRESSURE</title>
      <link>https://trid.trb.org/View/308884</link>
      <description><![CDATA[Characterization of stress-deformation behavior of plain concrete has been a subject of active research for a long time.  Linear elastic, non-linear (piecewise linear) elastic, elastic-plastic, and endochronic models have been proposed and used by various investigators, and literature on these subjects is very wide.  A review of various models together with their implementation in numerical (finite element) procedures is presented in the references.  A generalized constitutive model based on the theory of plasticity is proposed to characterize stress-deformation behaviour of concrete.  It allows for factors such as hardening, volume changes, stress paths, cohesive and tensile strengths, and variation of yield behaviior with mean pressure.  The constants for the model are determined from comprehensive series of laboratory tests under different initial confinements and stress paths by using a multiaxial testing device.  The model is verified with respect to laboratory tests used for finding the constants and complex stress path tests not used for finding the constants.  Overall, the proposed model involves less or an equal number of constants compared to available models of similar capabilities and is easier to implement in (numerical) solution procedures. It is believed that the proposed procedure can provide an alternative and generalized, yet simplified, approach for developing constitutive models for plain concrete.]]></description>
      <pubDate>Tue, 31 Jul 1990 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/308884</guid>
    </item>
    <item>
      <title>A COMPRESSIVE STRENGTH CRITERION FOR ANISOTROPIC ROCK MATERIALS</title>
      <link>https://trid.trb.org/View/283358</link>
      <description><![CDATA[This paper proposes a general compressive strength criterion for anisotropic rock materials under multiaxial states of stress.  The proposed criterion is a generialization of the Von Mises' criterion for yielding of ductile metals, which has also been used previously as a strength criterion for brittle fracture in the spirit of both being limits of linear elastic behavior.  The presently proposed criterion takes into consideration the effects of the confining pressure, the various stress components, and the material anisotropy on rock maerial failure in a multiaxial stress state.  To verify the applicability of the proposed criterion, it has been used to construct the failure envelopes for several types of rock materials. Consequently, the constructed failure envelopes and the corresponding experimental results have been compared.  In all cases, a close agreement with the experimental results has been achieved.  This result demonstrates the versatility and applicability of the proposed strength criterion in representing the compressive strength behavior of anisotropic rock material under complex multiaxial states of stress.]]></description>
      <pubDate>Wed, 31 Aug 1988 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/283358</guid>
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    <item>
      <title>HIGH CAPACITY MULTIAXIAL TESTING DEVICE</title>
      <link>https://trid.trb.org/View/182241</link>
      <description><![CDATA[In the field conditions, geologic materials are subjected to three-dimensional states of stress.  Hence for appropriate simulation of the field conditions and for deriving constitutive models, it is desirable to test specimens of the materials under truly triaxial states of stress.  This paper describes construction, details, and application of a truly triaxial device for testing materials of relatively high strength.  A number of improvements over the previous designs are included, and the capability of the device to test a wide range of materials such as ballast, concrete, rock, and wood is established.  (Author)]]></description>
      <pubDate>Thu, 30 Dec 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/182241</guid>
    </item>
    <item>
      <title>FLUID CUSHION TRULY TRIAXIAL OR MULTIAXIAL TESTING DEVICE</title>
      <link>https://trid.trb.org/View/147874</link>
      <description><![CDATA[The derivation of the constitutive relations of soils requires a testing facility that can apply a homogeneous and nearly ideal set of controlled boundary conditions to a specimen.  A new multiaxial cubical test apparatus is described.  If uses fluid or pneumatically pressurized flexible cushions to transmit a three-dimensional, independently controlled, and compressive stress state to a 102-mm (4-in.) specimen of geologic material.  The deformations in three orthogonal directions are detected by a set of linear variable differential transforms.  Flexible cushions allow nearly unrestrained deformations in the specimen.  The deformations are uniform even at large strains.  The specimen preparation and apparatus assembly procedures are straightforward.  The simplicity of the multiaxial cubical cell and its easy operating procedures are emphasized.  Typical stress-strain curves for straight-line stress paths are discussed.  The apparatus appears to opeate especially well at low stress levels. (Author)]]></description>
      <pubDate>Tue, 30 Dec 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/147874</guid>
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      <title>EVALUATION AND SUMMARY OF A STUDY OF THE LONG-TERM MULTIAXIAL CREEP BEHAVIOR OF CONCRETE</title>
      <link>https://trid.trb.org/View/47539</link>
      <description><![CDATA[The creep behavior of concrete subjected to triaxial compressive stresses and elevated temperature was evaluated. Strains were measured in cylindrical specimens subjected to 58 test conditions: 0--3600 psi compressions; curing times of 90, 183, and 365 days; two curing histories (air-dried and as-cast); and two temperatures (75 and 150 exp 0 F). The 90-day-cwed specimens were loaded for 12 months, followed by 5-month recovery. The other specimens were uniaxially stressed to 600 or 2400 psi for 5.25 or 4.75 years at 75 exp 0 F, followed by 77-day recovery. Strain measurements were made during the curing, loaded, and unloaded-recovery periods. This report describes the experiment setup and summarizes the results and recommendations. (ERA citation 02:003558)]]></description>
      <pubDate>Wed, 30 Mar 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/47539</guid>
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      <title>APPARATUS FOR TESTING CONCRETE UNDER MULTIAXIAL STATES OF STRESS</title>
      <link>https://trid.trb.org/View/34270</link>
      <description><![CDATA[The paper describes the equipment and techniques for applying multiaxial stress states to specimens of concrete, and accurately measuring the deformation at small and large strains. Particular attention is given to inducing uniform and definable states of stress, together with ease and accuracy of control during the various loading regimes. Details of the construction of the apparatus and principles of operation are given. /TRRL/]]></description>
      <pubDate>Tue, 18 Nov 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/34270</guid>
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    <item>
      <title>SOME OBSERVATIONS ON THE COMPONENTS OF CREEP IN CONCRETE</title>
      <link>https://trid.trb.org/View/25742</link>
      <description><![CDATA[Some experimential creep data are analysed with reference to recent ideas that creep can be separated into recoverable and irrecoverable basic creep and recoverable and irrecoverable drying creep. Data on lateral strain behaviour are also presented. It is shown that this division of creep on the basis of axial strain measurements is not satisfactory. The implications of the results for future work on creep under uniaxial and multiaxial loading are indicated.]]></description>
      <pubDate>Tue, 22 Apr 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/25742</guid>
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