|
| Title |
COMPUTATION OF EQUIVALENT SINGLE-WHEEL LOADS USING LAYERED THEORY
|
| Accession No |
00205779 |
| Authors |
Huang, Y H |
| Journal Title |
Highway Research Record
|
Corp. Authors
/ Publisher |
Highway Research Board
|
| Publication Date |
19690000 |
| Abstract |
A METHOD BASED ON ELASTIC LAYERED THEORY AND PROGRAMMED FOR A HIGH-SPEED COMPUTER WAS DEVELOPED FOR DETERMINING EQUIVALENT SINGLE-WHEEL LOADS FOR DUAL WHEELS. IT WAS FOUND THAT EQUIVALENT SINGLE-WHEEL LOADS BASED ON EQUAL VERTICAL DEFLECTION AT THE PAVEMENT-SUBGRADE INTERFACE WERE GENERALLY GREATER THAN THOSE BASED ON EQUAL VERTICAL STRESS OR EQUAL SURFACE DEFLECTION. THE EFFECT OF VARIOUS FACTORS ON EQUIVALENT SINGLE-WHEEL LOADS WAS INVESTIGATED, USING EQUAL-INTERFACE DEFLECTION CRITERION. IT WAS FOUND THAT THE RATIO BETWEEN THE TOTAL LOAD ON DUAL WHEELS AND THE EQUIVALENT SINGLE-WHEEL LOAD DEPENDS ON THREE FACTORS: PAVEMENT THICKNESS, WHEEL SPACING, AND MODULUS RATIO, WHICH IS THE RATIO OF THE MODULI OF ELASTICITY OF PAVEMENT AND SUBGRADE. CHARTS THAT GIVE THE INTERFACE DEFLECTION UNDER A CIRCULAR LOAD FOR VARIOUS PAVEMENT THICKNESSES, OFFSET DISTANCES, AND MODULUS RATIOS ARE PRESENTED SO THAT THE EQUIVALENT SINGLE-WHEEL LOAD FOR ANY GIVEN LOADING AND PAVEMENT CONDITION CAN BE DETERMINED. AN IMPORTANT FACT REVEALED BY THIS STUDY IS THAT THE EQUIVALENT SINGLE-WHEEL LOAD INCREASES APPRECIABLY WITH THE INCREASE IN MODULUS RATIO. THE CURRENT METHOD OF ASSUMING THAT PAVEMENTS ARE HOMOGENEOUS MEDIA WITH A MODULUS RATIO OF UNITY ALWAYS GIVES AN EQUIVALENT SINGLE-WHEEL LOAD THAT IS TOO SMALL AND IS NOT IN LINE WITH THE FINDINGS OF THE WASHO ROAD TEST. /AUTHOR/ |
Supplemental
Information |
No 291, pp 144-155, 7 FIG, 3 TAB, 11 REF, 1 APP |
| TRT Terms |
Computer programs ; Elasticity (Mechanics) ; Modulus of elasticity ; Pavements ; Spacing ; Thickness ; Wheel loads ; Wheels |
| Other Terms |
Elastic theory; Pavement thickness; Single wheel load |
| Subject Areas |
H24 PAVEMENT DESIGN AND PERFORMANCE |
| Availability |
Transportation Research Board Business Office |
| TRIS Files |
HRIS |
| Database |
TRIS Online |
|
TRT
