Dynamic Linear Back Calculation of Pavement Material ParametersSource: Journal of Transportation Engineering, Part A: Systems:;1994:;Volume ( 120 ):;issue: 001Author:Jacob Uzan
DOI: 10.1061/(ASCE)0733-947X(1994)120:1(109)Publisher: American Society of Civil Engineers
Abstract: The dynamic linear back calculation procedure for estimating pavement material properties is presented. Two approaches based on the fitting of the data in the time and frequency domain are described in detail. The time‐domain approach is recommended when the deflection histories do not decay to zero at the end of the sampling window. The parameter identification procedure used to generate the sensitivity matrix and the load vector and to solve the overdetermined set of equations is described. Twenty‐four test sections from the GPS of the SHRP‐LTPP program are analyzed. The material properties back calculated are: (1) The moduli of elasticity for unbound base, subbase and subgrade materials; and (2) the parameters of the generalized power law of the creep compliance of the asphalt concrete. The results are compared with those of the static linear back‐calculation procedure and of laboratory tests. It is found that: (1) The moduli of elasticity for unbound materials from static and dynamic analyses compare relatively well; and (2) the exponents of the power law from back calculation and laboratory results do not compare well. It is suggested that the sample tested in the laboratory may not be representative of the whole asphalt concrete layer.
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contributor author | Jacob Uzan | |
date accessioned | 2017-05-08T21:03:01Z | |
date available | 2017-05-08T21:03:01Z | |
date copyright | January 1994 | |
date issued | 1994 | |
identifier other | %28asce%290733-947x%281994%29120%3A1%28109%29.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/36751 | |
description abstract | The dynamic linear back calculation procedure for estimating pavement material properties is presented. Two approaches based on the fitting of the data in the time and frequency domain are described in detail. The time‐domain approach is recommended when the deflection histories do not decay to zero at the end of the sampling window. The parameter identification procedure used to generate the sensitivity matrix and the load vector and to solve the overdetermined set of equations is described. Twenty‐four test sections from the GPS of the SHRP‐LTPP program are analyzed. The material properties back calculated are: (1) The moduli of elasticity for unbound base, subbase and subgrade materials; and (2) the parameters of the generalized power law of the creep compliance of the asphalt concrete. The results are compared with those of the static linear back‐calculation procedure and of laboratory tests. It is found that: (1) The moduli of elasticity for unbound materials from static and dynamic analyses compare relatively well; and (2) the exponents of the power law from back calculation and laboratory results do not compare well. It is suggested that the sample tested in the laboratory may not be representative of the whole asphalt concrete layer. | |
publisher | American Society of Civil Engineers | |
title | Dynamic Linear Back Calculation of Pavement Material Parameters | |
type | Journal Paper | |
journal volume | 120 | |
journal issue | 1 | |
journal title | Journal of Transportation Engineering, Part A: Systems | |
identifier doi | 10.1061/(ASCE)0733-947X(1994)120:1(109) | |
tree | Journal of Transportation Engineering, Part A: Systems:;1994:;Volume ( 120 ):;issue: 001 | |
contenttype | Fulltext |