00936210

Component

https://doi.org/10.3141/1816-14

http://scholar.google.com...eman&publication_year=2002

Testing at Virginia Smart Road allowed determination of the vertical compressive stress pulse induced by a moving truck and by falling weight deflectometer (FWD) loading at different locations beneath the pavement surface. Testing was performed on 12 different flexible pavement sections. Stress and temperature were measured using pressure cells and thermocouples, respectively, that had been installed during construction of the road. Target testing speeds were 8 km/h, 24 km/h, 40 km/h, and 72 km/h. The considered depths below the pavement surface were 40 mm, 190 mm, 267 mm, 419 mm, and 597 mm. A haversine or normalized bell-shape equation was found to be a good representation of the measured normalized vertical compressive stress pulse for a moving vehicle. Haversine duration times varied from 0.02 s for a vehicle speed of 70 km/h at a depth of 40 mm to 1 s for a vehicle speed of 10 km/h at a depth of 597 mm. For the FWD loading, a haversine with a duration of 0.03 s was found to approximate the induced stress pulse at any depth below the pavement surface. Currently, laboratory dynamic testing on hot-mix asphalt (HMA) specimens is performed using a haversine wave at loading duration of 0.1 s. Because HMA is a viscoelastic material, the loading time affects its properties and, therefore, it is recommended that the loading time of HMA dynamic tests be reduced to 0.03 s to better match loading times obtained from moving trucks at average speed and from FWD testing.

This paper appears in Transportation Research Record No. 1816, Pavement Management, Monitoring, and Accelerated Testing 2002.

English

p. 125-136

2002

Transportation Research Record

0309077419

Figures (10) ; References (14) ; Tables (1)

Depth; Dynamic tests; Falling weight deflectometers; Flexible pavements; Hot mix asphalt; Laboratory tests; Live loads; Load cells; Measurement; Speed; Stresses; Temperature; Thermocouples; Time duration

Vertical compressive stress pulse

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

TRIS, TRB, ATRI

Jan 28 2003 12:00AM

• ACCELERATED PAVEMENT TESTING OF DRAINED AND UNDRAINED PAVEMENTS UNDER WET BASE CONDITIONS
• CONDITION-BASED METHOD FOR PROGRAMMING ROAD INFRASTRUCTURE MAINTENANCE
• CUMULATIVE TRAFFIC PREDICTION METHOD FOR LONG-TERM PAVEMENT PERFORMANCE MODELS
• DEVELOPMENT OF ROUGHNESS THRESHOLDS FOR PREVENTIVE MAINTENANCE ACTION AIMED AT REDUCING DYNAMIC LOADS
• ENCAPSULANT MATERIAL EFFECTS ON RESPONSE OF FIBER-OPTIC TRAFFIC SENSORS
• ESTIMATING INTERNATIONAL ROUGHNESS INDEX FROM PAVEMENT DISTRESSES TO CALCULATE VEHICLE OPERATING COSTS FOR THE SAN FRANCISCO BAY AREA
• FRAMEWORK AND STRATEGY FOR IMPLEMENTING AN INFORMATION TECHNOLOGY-BASED PAVEMENT MANAGEMENT SYSTEM
• IDENTIFICATION OF PAVEMENT FAILURE MECHANISMS AT FHWA ACCELERATED LOADING FACILITY ULTRATHIN WHITETOPPING PROJECT
• MARYLAND STATE HIGHWAY ADMINISTRATION'S PROJECT SELECTION PROCESS: INTEGRATING NETWORK AND PROJECT-LEVEL ANALYSIS
• MULTICRITERIA ANALYSIS METHOD FOR PAVEMENT MAINTENANCE MANAGEMENT
• MULTIYEAR PAVEMENT REPAIR SCHEDULING OPTIMIZATION BY PRECONSTRAINED GENETIC ALGORITHM
• RISK-BASED LIFE-CYCLE COST ANALYSIS FOR PROJECT-LEVEL PAVEMENT MANAGEMENT
• TRUCKING TRENDS AND CHANGES THAT AFFECT PAVEMENTS
• USE OF DISTRESS AND RIDE QUALITY DATA TO DETERMINE ROUGHNESS THRESHOLDS FOR SMOOTHING PAVEMENTS AS A PREVENTIVE MAINTENANCE ACTION
• WEIGH-IN-MOTION APPLICATIONS FOR INTELLIGENT TRANSPORTATION SYSTEMS--COMMERCIAL VEHICLE OPERATIONS: EVALUATION USING WESTA