Dynamic stiffness modulus for pavement subgrade evaluation

Loizos, A; Boukovalas, G; Karlaftis, A

dc.contributor.author	Loizos, A	en
dc.contributor.author	Boukovalas, G	en
dc.contributor.author	Karlaftis, A	en
dc.date.accessioned	2014-03-01T01:18:54Z
dc.date.available	2014-03-01T01:18:54Z
dc.date.issued	2003	en
dc.identifier.issn	0733-947X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15254
dc.subject	Dynamic analysis	en
dc.subject	In situ tests	en
dc.subject	Non-destructive tests	en
dc.subject	Pavements	en
dc.subject	Stiffness	en
dc.subject	Subgrades	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Transportation Science & Technology	en
dc.subject.other	Computer simulation	en
dc.subject.other	Dynamic loads	en
dc.subject.other	Elasticity	en
dc.subject.other	Nondestructive examination	en
dc.subject.other	Pavements	en
dc.subject.other	Soils	en
dc.subject.other	Stiffness	en
dc.subject.other	Plate loading tests	en
dc.subject.other	Transportation	en
dc.subject.other	pavement	en
dc.subject.other	stiffness	en
dc.title	Dynamic stiffness modulus for pavement subgrade evaluation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)0733-947X(2003)129:4(434)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)0733-947X(2003)129:4(434)	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	To avoid cumbersome traditional techniques for pavement subgrade evaluation such as the California bearing ration and the plate loading test, several nondestructive tests (NDT) as well as suitable analysis processes 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), one of the most popular NDT techniques for pavement evaluation. The goal is twofold: a simplified dynamic simulation of the FWD test is 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 central deflection measured during FWD testing and can be directly performed in the field. A preliminary analysis of field data suggests that the DSM represents the average dynamic modulus of elasticity of the subgrade material. Furthermore, it follows notably well the trends in the results of conventional nondestructive testing techniques and can be consequently adopted to describe the performance of pavement subgrade soils under traffic-induced dynamic loads.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Transportation Engineering	en
dc.identifier.doi	10.1061/(ASCE)0733-947X(2003)129:4(434)	en
dc.identifier.isi	ISI:000183657000013	en
dc.identifier.volume	129	en
dc.identifier.issue	4	en
dc.identifier.spage	434	en
dc.identifier.epage	443	en