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Effects of Pavement Roughness on Rigid Pavement Stress

Published online by Cambridge University Press:  31 March 2011

C.-M. Kuo ,
C.-R. Fu  and
K.-Y. Chen
C.-M. Kuo*
Affiliation:
Department of Civil Engineering, National Chen Kung University, Tainan City, Taiwan, 70101, R.O.C.
C.-R. Fu
Affiliation:
Department of Civil Engineering, National Chen Kung University, Tainan City, Taiwan, 70101, R.O.C.
K.-Y. Chen
Affiliation:
Department of Civil Engineering, National Chen Kung University, Tainan City, Taiwan, 70101, R.O.C.
*
* Associate Professor, corresponding author
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Abstract

Pavement roughness causes pavement stress fluctuation along the road. However, the dynamic effects were not taken into account in most pavement design and studies. To investigate the influences of roadway roughness on pavement stresses, this study developed a coupled system consisting of a quarter-car model and an equivalent lump pavement model. The coupled system also incorporated measured road profiles. By means of transfer function in frequency domain, the deflections and stresses of pavements were computed in seconds. The results were validated with Westergaard's solutions satisfactorily. It was found that the critical roughness, which might cause extreme responses, is related to the vehicle speed and suspension of vehicles. The maximum tension at the bottom of pavements also depends on the size of bump. In addition, the study demonstrates the correlation between roughness index, IRI, and ISO roughness classifications. It was also found that disturbance due to model boundary affects simulation results significantly.

Keywords

Rigid pavementPavement roughnessQuarter-car modelDynamic stress
Type
Articles
Information
Journal of Mechanics , Volume 27 , Issue 1 , March 2011 , pp. 1 - 8
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2011

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References

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