Title: DYNAMIC DEFLECTION AS PAVEMENT PERFORMANCE INDICATOR
Abstract: In recent years highway engineers have been greatly concerned with development of rational design schemes that accurately predict the performance of pavement structures as well as selection of suitable rehabilitation strategies. These rational analyses of pavement performance are carried out within the framework of multi-layer elastic theory and take into account the magnitude of stresses, strains, and displacements. Included in these rational procedures are appropriate distress criteria by which the pavement performance and remaining life can be analyzed. Some systems also incorporate in-situ material characteristics and modeling of pavement response for rehabilitation and overlay design purposes. Stresses and strains, as performance parameters, have the disadvantage of not being easily measured in the field. In lieu of stress and strain measurements in the field, measurements of pavement surface deflection and curvature at the road surface are considered as rational indicators of pavement performance. The deflection of a pavement system and its curvature under load are influenced by the stiffness of pavement components moduli, thickness, load intensity and the overall structural integrity of the pavement system. In this paper various deflection-basin parameters are presented as performance indicators. (a) (TRRL)
Publication Year: 1982
Publication Date: 1982-01-01
Language: en
Type: article
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Cited By Count: 1
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