00490156

Component

http://onlinepubs.trb.org...trr/1988/1196/1196-016.pdf

https://scholar.google.co...Abbo&publication_year=1988

Mechanistic models to predict structural performance and deterioration have been developed for both flexible and rigid pavements. However, many of these models retain a simplified and idealized depiction of tire loads, and none really incorporates a true representation of a moving, dynamic force along the pavement surface. Thus, attempts to model the impacts to pavements of new types of heavy vehicles have at best been approximate and have often had to be supplemented by empirical data. In this paper we develop analytic models to study the interactions between moving, dynamic loads and highway pavements. One set of models simulates the dynamic behavior of heavy vehicles, including their body configuration and mass distribution, axle spacing and configuration, nonlinear suspension characteristics, and nonlinear tire behavior. The second set of models simulates the primary responses (stresses, strains, etc.) of pavements to vehicle forces, and translates primary responses into pavement damage. Existing mechanistic models are modified specifically to treat moving, dynamic loads for both flexible and rigid pavements. This paper presents examples of results (in terms of both dynamic forces and pavement damage) for rigid pavements, although the concepts apply as well to flexible surfaces. A parametric study is summarized, considering variations in both vehicle and pavement characteristics. Those characteristics most important to dynamic loading include vehicle suspension type and characteristics, speed, height of pavement faults, and joint spacing. Other factors (such as tire pressure) contribute smaller effects (although tire pressures are more important on flexible pavements). Results indicate that under certain conditions, dynamic loads are 40% higher than static loads and affect the mid-region of PCC slabs most significantly.

This paper appears in Transportation Research Record No. 1196, Pavement Evaluation and Rehabilitation. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01407205

p. 161-169

1988

Transportation Research Record

0309047714

Figures (8) ; References (10)

Axle load force; Dynamic loads; Flexible pavements; Heavy vehicles; Inflation; Joints; Mathematical models; Mechanical analysis; Mechanistic design; Motor vehicles; Pavement performance; Pavements; Rigid pavements; Rolling contact; Spacing; Speed; Strain (Mechanics); Stresses; Suspension systems; Tire pressure; Tires; Traffic speed; Trucks

Joint spacing

Design; Highways; Motor Carriers; Pavements; Vehicles and Equipment; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Dec 31 1989 12:00AM

• APPLICATION OF DEFLECTION TESTING TO OVERLAY DESIGN: A CASE STUDY
• ASPHALT PAVEMENT EVALUATION USING FUZZY SETS
• COLD, IN-PLACE RECYCLING ON INDIANA STATE ROAD 38
• COMPACTION SPECIFICATION FOR THE CONTROL OF PAVEMENT SUBGRADE RUTTING
• COMPARISON OF METHODS AND EQUIPMENT TO CONDUCT PAVEMENT DISTRESS SURVEYS
• CONCRETE PAVEMENT REHABILITATION FOR THE TEXAS STATE DEPARTMENT OF HIGHWAYS AND PUBLIC TRANSPORTATION
• DATA ACQUISITION FOR MECHANISTIC-EMPIRICAL OVERLAY DESIGN EQUATIONS FOR REFLECTION CRACKING IN FLEXIBLE OVERLAYS
• DETERMINATION OF PAVEMENT LAYER THICKNESSES AND MODULI BY SASW METHOD
• DIRECT CALCULATION OF MAXIMUM CURVATURE AND STRAIN IN ASPHALT CONCRETE LAYERS OF PAVEMENTS FROM LOAD DEFLECTION BASIN MEASUREMENTS
• DYNAFLECT EVALUATION OF LAYER MODULI IN FLORIDA'S FLEXIBLE PAVEMENT SYSTEMS
• EFFECT OF REFLECTED WAVES IN SASW TESTING OF PAVEMENTS
• ESTABLISHING RELATIONSHIPS BETWEEN PAVEMENT ROUGHNESS AND PERCEPTIONS OF ACCEPTABILITY (WITH DISCUSSION AND CLOSURE)
• EVALUATION OF THE PERFORMANCE OF BONDED CONCRETE OVERLAY ON INTERSTATE HIGHWAY 610 NORTH, HOUSTON, TEXAS
• FIELD EVALUATION OF BONDED CONCRETE OVERLAYS
• FIELD SURVEY EQUIPMENT AND DATA ANALYSIS FOR HIGHWAY REHABILITATION PLANNING
• FLEXIBLE PAVEMENT REHABILITATION USING ASPHALT-RUBBER COMBINATIONS: PROGRESS REPORT
• LEF ESTIMATION FROM CANROAD PAVEMENT LOAD-DEFLECTION DATA
• LOAD-ASSOCIATED CRACK MOVEMENT MECHANISMS IN ROADS
• MEASURING PAVEMENT DEFLECTIONS NEAR A SUPER-HEAVY OVERLOAD
• NETWORK LEVEL OPTIMIZATION/PRIORITIZATION OF PAVEMENT REHABILITATION
• OBTAINING SKID NUMBER AT ANY SPEED FROM TEST AT SINGLE SPEED
• PAVEMENT CONDITION DIAGNOSIS BASED ON MULTISENSOR DATA
• PROFILOGRAPH CORRELATION STUDY WITH PRESENT SERVICEABILITY INDEX
• RELATIVE INFLUENCE OF ACCELEROMETER AND DISPLACEMENT TRANSDUCER SIGNALS IN ROAD ROUGHNESS MEASUREMENTS
• RESILIENT MODULUS AND AASHTO PAVEMENT DESIGN
• ROAD CHARACTERISTICS AND SKID TESTING
• SERVICEABILITY INDEX BASE FOR ACCEPTANCE OF JOINTED CONCRETE PAVEMENTS
• SOME APPROACHES IN TREATING AUTOMATICALLY COLLECTED DATA ON RUTTING
• THREE-DIMENSIONAL ANALYSIS OF SLAB ON STRESS-DEPENDENT FOUNDATION
• USE OF THE INERTIAL PROFILOMETER TO CALIBRATE KENTUCKY DEPARTMENT OF HIGHWAYS MAYS RIDE METER SYSTEMS
• VERIFICATION OF BACKCALCULATION OF PAVEMENT MODULI