A modified Chevron N-Layer computer program has the capability of calculating the 'work' done by the total load on a given load group. Earlier analyses of AASHO Road Test sections and test vehicles had permitted the development of damage factor relationships. This paper presents seven, namely two-tire and four-tire single axles, tandems, triaxles, and four-axle, five-axle, and six-axle groups. The two-tire axle (front or steering axle) has the most severe damage relationship. The 80-kN (18-kip) four-tire single axle was used as the reference axle and was assigned a damage factor of 1.0 for a specific amount of 'work'. Other axle arrangements and total loads producing that amount of 'work' were 63.6kN (14.3 kips) for the two-tire axle, 166.4kN (37.4 kips) for eight-tire tandems, 250.2kN (56.25 kips) for twelve-tired triaxles, 333.6kN (75.0 kips) for a sixteen-tired four-axle group, 415.0kN (93.3 kips) for a twenty-tired five axle group, and 496.4kN (111.6 kips) for a twenty-four-tired six-axle group.
Fatigue Damage of Flexible Pavements under Heavy Loads
1979
25 pages
Report
No indication
English
Stiffness Reductions of Flexible Pavements due to Cumulative Fatigue Damage
British Library Online Contents | 1996
|The Fatigue of Flexible Pavements
NTIS | 1971
|Stiffness Reductions of Flexible Pavements due to Cumulative Fatigue Damage
Online Contents | 1996
|