Pavement soil characterization using a dynamic stiffness model

Loizos, A; Boukovalas, G

dc.contributor.author	Loizos, A	en
dc.contributor.author	Boukovalas, G	en
dc.date.accessioned	2014-03-01T01:22:54Z
dc.date.available	2014-03-01T01:22:54Z
dc.date.issued	2005	en
dc.identifier.issn	10298436	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16717
dc.subject	Dynamic analysis	en
dc.subject	In situ testing	en
dc.subject	Material stiffness moduli	en
dc.subject	Non-destructive testing	en
dc.subject	Subgrade	en
dc.subject.other	Deflection (structures)	en
dc.subject.other	Elastic moduli	en
dc.subject.other	Hysteresis	en
dc.subject.other	Mathematical models	en
dc.subject.other	Nondestructive examination	en
dc.subject.other	Real time systems	en
dc.subject.other	Soil mechanics	en
dc.subject.other	Stiffness	en
dc.subject.other	Structural loads	en
dc.subject.other	Dynamic analysis	en
dc.subject.other	In situ testing	en
dc.subject.other	Material stiffness moduli	en
dc.subject.other	Subgrade	en
dc.subject.other	Pavements	en
dc.title	Pavement soil characterization using a dynamic stiffness model	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/10298430500035638	en
heal.identifier.secondary	http://dx.doi.org/10.1080/10298430500035638	en
heal.publicationDate	2005	en
heal.abstract	To avoid cumbersome traditional techniques for pavement subgrade evaluation, such as the California bearing ratio (CBR) and the plate loading test (PLT), several non-destructive tests (NDT) and suitable analysis procedures have been introduced to assess the properties, the structural condition, the residual life and the possible need for improvement of pavement soils. This paper deals with the implementation of the falling weight deflectometer (FWD) as well as its portable light version (L-FWD), one of the most popular NDT techniques for pavement evaluation. The goal is two-fold: A simplified dynamic simulation of both the FWD and the L-FWD tests are first presented and consequently the dynamic stiffness modulus (DSM) is proposed as an indicator of pavement subgrade performance. Computation of the DSM requires only the deflection under the load measured during the system testing, and can be directly performed in the field. Parametric analyses were undertaken both in order to evaluate the DSM computation methods, as well as to determine when the commonly applied static analyses of the FWD and the L-FWD are not adequate. A preliminary analysis of field data suggests that the DSM represents the average dynamic modulus of elasticity of the subgrade material. © 2005 Taylor & Francis Group Ltd.	en
heal.journalName	International Journal of Pavement Engineering	en
dc.identifier.doi	10.1080/10298430500035638	en
dc.identifier.volume	6	en
dc.identifier.issue	1	en
dc.identifier.spage	5	en
dc.identifier.epage	15	en