A COMPARISON OF FLEXIBLE PAVEMENT BEHAVIOR UNDER DUAL AND FLOTATION TIRES FOR STATIC AND MOVING LOADS
THE BEHAVIOUR OF FLEXIBLE PAVEMENTS UNDER DUAL (9.00-20, 12-PLY) AND FLOTATION (16. 5-19, 16-PLY) TIRES WITH LOADING OF 9,000 LBS. IS COMPARED ON THE BASIS OF DEFLECTION, CURVATURE, THE BOUSSINESQ SOLUTION, AND THE FINITE ELEMENT METHOD. STATIC DEFLECTION BOWLS ARE MEASURED WITH A SERIES OF FIVE BENKELMAN BEAMS AND DEFLECTION PROFILES FOR MOVING LOADS ARE PLOTTED BY A SPECIAL BENKELMAN BEAM EQUIPPED WITH A DCDT, AT THREE DEFLECTION LEVELS (0.030, 0.050, AND 0.250 IN.), THE MAXIMUM DEFLECTIONS AND CURVATURE (MEASURED BY FORD AND BISSETT'S RATIO AND KUNG'S SLOPE OF DEFLECTION) ARE MORE SEVERE FOR THE FLOTATION TIRE. IT IS CONCLUDED, THAT FOR THE STRUCTURAL SECTIONS AND DEFLECTION LEVELS CONSIDERED, THAT THIS FLOTATION TIRE IS INFERIOR TO THE DUAL TIRES IN TERMS OF ANTICIPATED PAVEMENT PERFORMANCE. THE CLASSICAL BOUSSINESQ SOLUTION INDICATES THAT THE VERTICAL STRESSES WILL BE HIGHER UNDER THE FLOTATION TIRE THAN THE DUAL TIRES. PRELIMINARY FINITE ELEMENT SOLUTIONS (USING AN AXI-SYMMETRIC PROGRAM) FOR ASSUMED MATERIAL PROPERTIES SHOW THE DEFLECTIONS TO BE GREATER UNDER THE FLOTATION TIRE, AND THE IMPORTANCE OF THE AC MODULUS TO THE DISTRIBUTION OF STRESSES IN A LAYERED SYSTEM. THE FINITE ELEMENT METHOD ALLOWS INHOMOGENEOUS, INELASTIC, ANISOTROPIC MATERIALS TO BE CONSIDERED. /AUTHOR/
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Supplemental Notes:
- pp 249-268, 22 FIG, 2 TAB, 23 REF
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Authors:
- Emery, J J
- Heslop, W G
- Publication Date: 1967-9
Media Info
Subject/Index Terms
- TRT Terms: Alternatives analysis; Behavior; Benkelman beam; Boussinesq equation; Curvature; Deflection; Deflection tests; Dynamic loads; Finite element method; Flexible pavements; Pavements; Static loads; Stresses; Tires
- Old TRIS Terms: Boussinesq formula; Finite elements; Layered system mechanics; Pavement deflection; Static loading
- Subject Areas: Highways; Pavements; Safety and Human Factors; Vehicles and Equipment;
Filing Info
- Accession Number: 00206578
- Record Type: Publication
- Source Agency: CANADIAN GOOD ROADS ASSOCIATION
- Files: TRIS
- Created Date: May 26 1994 12:00AM