Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SHRP Procedure for Temperature Correction of Maximum Deflections
Nondestructive deflection testing using falling weight deflectometers (FWDs) is one element of the monitoring effort currently underway by the Strategic Highway Research Program (SHRP) for the Long-Term Pavement Performance (LTPP) study. Because accurate data are key to the success of the LTPP study, SHRP has implemented a number of measures to ensure the quality of the deflection data. They include equipment comparison and calibration, standardized field testing procedure and field data checks, and quality assurance software. In turn, the quality assurance software includes a program called FWDCHECK which has been developed to analyze deflection data for, among other things, overall reasonableness from a structural capacity viewpoint. In the case of asphaltic concrete pavements, this structural capacity analysis follows the AASHTO direct structural number procedure. Since asphaltic concrete materials are temperature dependent in nature, measured deflections and hence the structural capacity of the pavement vary with temperature. Thus, a procedure to correct measured maxiumum deflections to a standard temperature is required so that the comparison of predicted versus expected structural capacities is a valid one. The report documents the temperature correction procedure developed for and used in the FWDCHECK program. (Copyright (c) 1993 National Academy of Sciences.)
SHRP Procedure for Temperature Correction of Maximum Deflections
Nondestructive deflection testing using falling weight deflectometers (FWDs) is one element of the monitoring effort currently underway by the Strategic Highway Research Program (SHRP) for the Long-Term Pavement Performance (LTPP) study. Because accurate data are key to the success of the LTPP study, SHRP has implemented a number of measures to ensure the quality of the deflection data. They include equipment comparison and calibration, standardized field testing procedure and field data checks, and quality assurance software. In turn, the quality assurance software includes a program called FWDCHECK which has been developed to analyze deflection data for, among other things, overall reasonableness from a structural capacity viewpoint. In the case of asphaltic concrete pavements, this structural capacity analysis follows the AASHTO direct structural number procedure. Since asphaltic concrete materials are temperature dependent in nature, measured deflections and hence the structural capacity of the pavement vary with temperature. Thus, a procedure to correct measured maxiumum deflections to a standard temperature is required so that the comparison of predicted versus expected structural capacities is a valid one. The report documents the temperature correction procedure developed for and used in the FWDCHECK program. (Copyright (c) 1993 National Academy of Sciences.)
SHRP Procedure for Temperature Correction of Maximum Deflections
1993
33 pages
Report
Keine Angabe
Englisch
Highway Engineering , Quality Control & Reliability , Nondestructive Testing , Transportation & Traffic Planning , Transportation , Pavement deflections , Nondestructive tests , Quality assurance , Temperature effects , Test methods , Calibration , Highway maintenance , Asphalt pavements , Structural analysis , Mathematical models , Computer programs , Falling weight deflectometers , FWDCHECK computer programs
SHRP procedure for temperature correction of maximum deflections
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