A THEORETICAL COMPARISON OF THE EFFECTS OF DUAL-TANDEM AND DUAL-WHEEL ASSEMBLIES ON PAVEMENTS, WITH DISCUSSION AND CLOSURE

PREVIOUS EXPERIMENTAL AND THEORETICAL STUDIES TO DETERMINE THE EQUIVALENCE OF DIFFERENT WHEEL ASSEMBLIES ARE REVIEWED AND THE CRITERIA ADOPTED IN MAKING COMPARISONS ARE DISCUSSED. THE THEORETICAL RESULTS PRESENTED IN THIS STUDY RELATE TO A TWO LAYER PAVEMENT CONSISTING OF ISOTROPIC, HOMOGENEOUS, ELASTIC MATERIALS. THE TOP LAYER REPRESENTS THE BASE AND SURFACE COURSES WHILE THE BOTTOM LAYER REPRESENTS A DEEP SUBGRADE. VARIOUS COMBINATIONS OF GEOMETRY AND MATERIAL PROPERTIES ARE CONSIDERED BY CHOOSING REALISTIC RANGES OF VALUES FOR THE CONTROLLING VARIABLES. THESE ARE: (1) RATIO OF THE MODULUS IN THE TOP LAYER TO THAT IN THE SECOND; (2) POISSON'S RATIOS OF THE LAYER MATERIALS; (3) RATIO OF THE TOP LAYER DEPTH TO THE LOADED RADIUS; AND (4) THE CENTER TO CENTER SPACING OF THE WHEELS. THE COMPARISONS OF THE EFFECTS OF A DUAL-TANDEM (4-WHEEL) ASSEMBLY AND A DUAL (2- WHEEL ASSEMBLY ARE MADE ON THE BASIS OF SEVERAL CRITERIA, SUCH AS VERTICAL DISPLACEMENT, VERTICAL STRESS, AND PRINCIPAL TENSILE STRAIN. THE RESULTS ARE SUMMARIZED IN THE FORM OF RATIOS OF ASSEMBLY LOADS REQUIRED TO PRODUCE THE SAME EQUIVALENT EFFECT. THE RELEVANCE OF THE VARIUS CRITERIA IS DISCUSSED. /AUTHOR/

• Record URL:
  • http://arrbknowledge.com
• Supplemental Notes:
  • PART 4
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • Gerrard, C M
  • Harrision, W J
  • Cumming, D A
• Conference:
  • Australian Road Research Board Conference Proc
• Publication Date: 1970

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 112-37
• Serial:
  • Volume: 5
  • Issue Number: Pt4

Subject/Index Terms

• TRT Terms: Axle load force; Deflection; Loads; Modulus of elasticity; Pavements; Tandem axle loads; Traffic equivalence factor; Trucks; Wheel loads
• Uncontrolled Terms: Vertical loads; Wheel load distribution
• Old TRIS Terms: Layered system mechanics; Pavement deflection; Truck pavement damage
• Subject Areas: Highways; Motor Carriers; Pavements;

Filing Info

• Accession Number: 00205993
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 28 1972 12:00AM