Dynamic Pavement‐Strain Histories from Moving Traffic Load
Publication: Journal of Transportation Engineering
Volume 120, Issue 5
Abstract
This paper presents the formulation and the application of a continuum‐based finite‐layer approach to evaluate dynamic pavement strains under moving traffic load. The dynamic material properties (complex shear modulus and Poisson's ratio) of the asphalt‐concrete (AC) layer can be varied as a function of the loading frequency. The predictive capability of the model is illustrated through a parametric study in which two typical thin and thick pavement sections were subjected to a semitrailer moving at different speeds. The results are very similar to those reported earlier from a field‐testing program. The results show that the pavement strains are strong functions of the pavement thickness and the vehicle speed, and they reduce substantially with the increase in the speed of the vehicle. Also, a substantial compressive‐strain component is present at the bottom of AC layer that may be important for any realistic fatigue‐life estimation of the pavement. The ratio between the maximum compressive strain to the maximum tensile strain at the bottom of the AC layer can be as high as 1.01 for the thick pavements under tandem axles.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 120 • Issue 5 • September 1994
Pages: 821 - 842
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Jul 2, 1993
Published online: Sep 1, 1994
Published in print: Sep 1994
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