A DISCRETE ELEMENT ANALYSIS FOR ANISOTROPIC SKEW PLATES AND GRIDS

THE PRINCIPAL FEATURES ARE: (1) FORMULATION OF SIX ELASTIC STIFFNESSES AND COMPLIANCES IN TERMS OF THREE MODULI OF ELASTICITY IN ANY THREE DIRECTIONS AND THREE POISSON'S RATIOS RELATED TO THESE DIRECTIONS, (2) REPRESENTATION OF AN ANISOTROPIC SKEW-PLATE-AND-GRID SYSTEM BY A DISCRETE-ELEMENT MODEL CONSISTING OF A TRIDIRECTIONAL ARRANGEMENT OF RIGID BARS AND ELASTIC JOINTS, (3) FORMULATION OF STRESS-STRAIN AND MOMENT-CURVATURE RELATIONS FOR THE DISCRETE-ELEMENT USING CONCEPTS OF A CONTINUM COMPOSED OF INTERCONNECTED FIBERS, (4) DERIVATION OF STIFFNESS MATRIX USING EQUATIONS OF STATICS, AND (5) A RECURSION-INVERSION PROCEDURE TO SOLVE THE STIFFNESS EQUATIONS. THE METHOD ALLOWS FREE VARIATION IN STIFFNESSES, LOADS, AND SUPPORTS. CONCENTRATED AND DISTRIBUTED LOADS AND SUPPORTS AND EXTERNAL COUPLES IN THREE DIRECTIONS ARE EASILY HANDLED, INCLUDING GRID-BEAMS IN THREE DIRECTIONS. A COMPUTER PROGRAM IS WRITTEN TO CHECK THE FORMULATION. THE RESULTS COMPARE WELL WITH THE RESULTS FROM OTHER APPROXIMATE METHODS AND WITH EXPERIMENTAL DATA. /AUTHOR/

• Corporate Authors:

  University of Texas, Arlington

  Arlington, TX  United States  76010

  Texas State Department of Highways & Public Transp

  11th and Brazos Streets
  Austin, TX  United States  78701

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Vora, M R
  • Matlock, H
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Anisotropy (Physics); Computer programs; Curvature; Deformation curve; Engineering moments; Equations; Loads; Mathematical models; Matrices (Mathematics); Modulus of elasticity; Poisson ratio; Skewed structures; Statics; Stiffness; Structural supports
• Uncontrolled Terms: Skewness
• Old TRIS Terms: Anisotropy; Grid beams; Moments; Poissons ratio; Supports
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00207970
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Files: TRIS, USDOT, STATEDOT
• Created Date: Nov 18 1970 12:00AM