MODELING UNDERGROUND STRUCTURE VULNERABILITY IN JOINTED ROCK

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The vulnerability of underground structures and openings in deep jointed rock to ground shock attack is of chief concern to military planning and security. Damage and/or loss of stability to a structure in jointed rock, often manifested as brittle failure and accompanied with block movement, can depend significantly on jointed properties, such as spacing, orientation, strength, and block character. We apply a hybrid Discrete Element Method combined with the Smooth Particle Hydrodynamics approach to simulate the MIGHTY NORTH event, a definitive high-explosive test performed on an aluminum lined cylindrical opening in jointed Salem limestone. Representing limestone with discrete elements having ... continued below

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1800 Kilobytes pages

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SWIFT, R. & STEEDMAN, D. February 1, 2001.

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The vulnerability of underground structures and openings in deep jointed rock to ground shock attack is of chief concern to military planning and security. Damage and/or loss of stability to a structure in jointed rock, often manifested as brittle failure and accompanied with block movement, can depend significantly on jointed properties, such as spacing, orientation, strength, and block character. We apply a hybrid Discrete Element Method combined with the Smooth Particle Hydrodynamics approach to simulate the MIGHTY NORTH event, a definitive high-explosive test performed on an aluminum lined cylindrical opening in jointed Salem limestone. Representing limestone with discrete elements having elastic-equivalence and explicit brittle tensile behavior and the liner as an elastic-plastic continuum provides good agreement with the experiment and damage obtained with finite-element simulations. Extending the approach to parameter variations shows damage is substantially altered by differences in joint geometry and liner properties.

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1800 Kilobytes pages

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  • Report No.: LA-UR-01-737
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 774450
  • Archival Resource Key: ark:/67531/metadc717544

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  • February 1, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 22, 2016, 8:56 p.m.

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SWIFT, R. & STEEDMAN, D. MODELING UNDERGROUND STRUCTURE VULNERABILITY IN JOINTED ROCK, article, February 1, 2001; New Mexico. (digital.library.unt.edu/ark:/67531/metadc717544/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.