Please use this identifier to cite or link to this item:
|Title:||Examining k-E relationship of pavement subgrade based on load-deflection consideration||Authors:||Setiadji, B.H.
|Issue Date:||2009||Citation:||Setiadji, B.H., Fwa, T.F. (2009). Examining k-E relationship of pavement subgrade based on load-deflection consideration. Journal of Transportation Engineering 135 (3) : 140-148. ScholarBank@NUS Repository. https://doi.org/10.1061/(ASCE)0733-947X(2009)135:3(140)||Abstract:||Most rigid-pavement design methods in use today adopt the Westergaard's approach that characterizes pavement foundation by k, the modulus of subgrade reaction. k is measured by a standard plate loading test conducted in the field. However, since this test is elaborate, expensive, and time consuming, the k value of a subgrade soil is usually estimated from other soil properties. In this regard, the relationship between k and the modulus of elasticity E of the soil is of special interest. This is because E is a fundamental engineering property and that there exists various test methods for determining E either in the field or in the laboratory. This paper proposes a procedure to estimate k from E by establishing an equivalency between two theoretical pavement models, a model of pavement slab supported by an elastic solid foundation (termed the E model) and a model of pavement slab supported by a dense liquid foundation (termed the k model). Instead of matching the k and E models directly as is done in currently available k-E relationship models, this study proposes to define an equivalent k model and an equivalent E model, separately, with respect to actual rigid pavements. The equivalency is established using back-calculation analysis based on load-deflection considerations. Using the deflection test data of the long-term pavement performance database, it is found that there exists a relationship between the radii of relative stiffness of the two theoretical systems, and this relationship can be used to estimate k from a given E value. © 2009 ASCE.||Source Title:||Journal of Transportation Engineering||URI:||http://scholarbank.nus.edu.sg/handle/10635/65566||ISSN:||0733947X||DOI:||10.1061/(ASCE)0733-947X(2009)135:3(140)|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Apr 17, 2019
WEB OF SCIENCETM
checked on Apr 17, 2019
checked on Apr 12, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.