00799043

Component

https://doi.org/10.3141/1709-05

http://scholar.google.com...aman&publication_year=2000

A computational model was developed to predict fatigue life of pavements under repeated loading and implemented into the three-dimensional finite-element code DYNA3D and the two-dimensional finite-element code NIKE2D. The model simulates the cracking response of flexible or rigid pavements under fatigue. An equation for fatigue crack growth was developed, which grows cracks under single cycles of loading at stresses well below yield. The cracks are incorporated into the material response and result in anisotropic behavior and decreased stiffness for cracked pavements. A procedure for estimating fatigue lifetimes by performing a limited series of calculations was developed. For each calculation, crack growth rate for a single loading cycle is calculated, crack extension is extrapolated to many cycles, and the cracking in the pavement is updated. The next cycle is calculated for the damaged pavement. The procedure is repeated until full damage is reached. Well-controlled laboratory bending fatigue test results generated at the University of California at Berkeley (UCB) for asphalt pavement were used to verify that the model assumptions are appropriate for modeling fatigue damage growth in asphalt pavement. The UCB bending fatigue tests were simulated using the repeat loading algorithm in DYNA3D. Calculations of crack growth for a given load cycle were compared in the NIKE2D and DYNA3D implementations.

This paper appears in Transportation Research Record No. 1709, Geotechnical Aspects of Pavements 2000.

English

p. 36-42

2000

Transportation Research Record

0309066883

Figures (9) ; References (9) ; Tables (1)

Algorithms; Asphalt pavements; Equations; Fatigue (Mechanics); Fatigue tests; Finite element method; Flexible pavements; Laboratory tests; Mathematical models; Pavement cracking; Repeated loads; Rigid pavements; Service life; Simulation

Crack growth

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Sep 28 2000 12:00AM

• ASSESSMENT OF FALLING WEIGHT DEFLECTOMETER DATA FOR STABILIZED FLEXIBLE PAVEMENTS
• CONSIDERATIONS FOR PROVIDING SUBSURFACE DRAINAGE IN JOINTED CONCRETE PAVEMENTS
• DEGREE AND EXTENT OF WETTING DUE TO CAPILLARY RISE IN SOILS
• DRAINAGE OF PAVEMENT BASE MATERIAL: DESIGN AND CONSTRUCTION ISSUES
• EFFECTIVENESS ANALYSIS OF SUBSURFACE DRAINAGE FEATURES BASED ON DESIGN ADEQUACY
• FIELD EVALUATION OF GEOCELL USE IN FLEXIBLE PAVEMENTS
• FINITE-LAYER APPROACH TO PAVEMENT RESPONSE EVALUATION
• PAVEMENT DISTRESS AND ROADWAY DAMAGE CAUSED BY SUBSURFACE MOISTURE AND FREEZING TEMPERATURES: CASE HISTORIES FROM ALASKA
• SEASONAL VARIATION OF MOISTURE AND SUBSURFACE LAYER MODULI
• STONE INTERLAYER PAVEMENT DESIGN
• THREE-DIMENSIONAL MODELING OF SPATIAL SOIL PROPERTIES VIA ARTIFICIAL NEURAL NETWORKS
• TUBE SUCTION TEST FOR EVALUATING AGGREGATE BASE MATERIALS IN FROST- AND MOISTURE-SUSCEPTIBLE ENVIRONMENTS
• USING A MULTISEGMENT TIME DOMAIN REFLECTOMETRY PROBE TO DETERMINE FROST DEPTH IN PAVEMENT SYSTEMS