Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Pavement Response to Moving Loads
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Väg- och banteknik.
2014 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The response of flexible pavements at vehicle-road interaction has been studied in this thesis. A quasi-static and a dynamic framework for analysing the pavement structure under moving load has been developed. Both frameworks are general, robust and computationally efficient.

The quasi-static procedure is based on superposition principle and is computationally favourable, as it requires only reduced incremental problem to be solved numerically. Using the developed framework the effect of vehicle configuration and traffic characteristics on the damage induced in pavements is investigated numerically. It is shown that the developed numerical model provides a more accurate explanation of different distress modes. Moreover the conventional analysis and design methods with layered linear elastic behaviour assumption for asphalt layer are unable to capture several important aspects of pavement response.

In the dynamic analysis approach the pavement roughness and vehicle suspension system is linked to a dynamic pavement model in order to account for the dynamic effects at vehicle-road interaction on pavement response. A finite element method is relied upon in order to establish the response function for a linear viscoelastic pavement structure with dynamic effects taken into account. The computational procedure developed is applied to evaluate the effect of the pavement surface roughness on the pavement structure response to truck traffic loading. Stress field parameters governing fracture initiation in asphalt layers are reported for two measured road roughness profiles. It is shown that the dynamic effects at vehicle-road interaction may have a profound influence on the stresses induced in flexible pavements; therefore these effects need to be taken into account for accurate prediction of the road performance in the field.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2014. , s. v, 20
Serie
TRITA-TSC-LIC, ISSN 1653-445X ; 14:002
Nationell ämneskategori
Infrastrukturteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-145321ISBN: 978-91-87353-40-6 (tryckt)OAI: oai:DiVA.org:kth-145321DiVA, id: diva2:717587
Presentation
2014-05-22, B1, Brinellvägen 23, KTH, Stockholm, 09:00 (Engelska)
Opponent
Handledare
Anmärkning

QC 20140516

Tillgänglig från: 2014-05-16 Skapad: 2014-05-15 Senast uppdaterad: 2014-05-16Bibliografiskt granskad
Delarbeten
1. A computational framework for viscoelastic analysis of flexible pavements under moving loads
Öppna denna publikation i ny flik eller fönster >>A computational framework for viscoelastic analysis of flexible pavements under moving loads
2012 (Engelska)Ingår i: Materials and Structures, ISSN 1359-5997, E-ISSN 1871-6873, Vol. 45, nr 11, s. 1655-1671Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A general quasi-static computational procedure is established to evaluate stresses and strainsinduced in the viscoelastic flexible pavement bymoving traffic. The procedure is based on superposition principle and is computationally favourable, as itrequires only reduced incremental problem to besolved numerically. The impact of traffic speed anddensity on the mechanical response of flexible pavement is examined numerically. Results relevant fortwo major modes of pavement’s distress, i.e. crackingand rutting, are reported. It is shown that the state-ofpractice layered elastic analysis used in pavementdesign is unable to capture several important qualitative and quantitative aspects of pavements response.

Nyckelord
Finite element, Viscoelasticity, Moving load, Flexible pavement
Nationell ämneskategori
Infrastrukturteknik
Forskningsämne
SRA - Transport
Identifikatorer
urn:nbn:se:kth:diva-104522 (URN)10.1617/s11527-012-9863-9 (DOI)000309876200005 ()2-s2.0-84869093125 (Scopus ID)
Forskningsfinansiär
TrenOp, Transport Research Environment with Novel Perspectives
Anmärkning

QC 20121203

Tillgänglig från: 2012-11-05 Skapad: 2012-11-05 Senast uppdaterad: 2017-12-07Bibliografiskt granskad
2. Impact of Long and Heavy Vehicles on Pavement Damage
Öppna denna publikation i ny flik eller fönster >>Impact of Long and Heavy Vehicles on Pavement Damage
2013 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

In the present paper the effect of vehicle configuration and traffic characteristics on the damage induced in pavements by traffic is investigated numerically. A three dimensional time-dependent pavement-vehicle interaction analysis is performed in order to study the impact of the parameters mentioned above on the mechanical response of flexible pavements. The analysis is based on a fast and robust computational procedure, developed by the authors. The numerical algorithm utilizes the three-dimensional finite element solution of the reduced problem of one tyre pavement interface loaded with tyre pressure. Afterwards, a superposition procedure based on fast Fourier transform techniques is applied to find the pavement response to moving loads. The method is general and capable of capturing the stress-strain response to any arbitrary loading history.One particular area of study with employing the current procedure is the analysis of long and heavy vehicle impact on pavement damage. Two major modes of distress, i.e. cracking and rutting have been discussed for 6 different truck types with 2 speeds. It is shown that an accurate numerical model provides a more accurate explanation of different distress modes. Moreover the conventional analysis and design methods with layered linear elastic behaviour assumption for asphalt layer are unable to capture several important aspects of pavement response.

Nationell ämneskategori
Infrastrukturteknik
Identifikatorer
urn:nbn:se:kth:diva-116565 (URN)
Konferens
TRB annual meeting,January 13-17, 2013,Washington, D.C.
Anmärkning

QC 20130201

Tillgänglig från: 2013-02-01 Skapad: 2013-01-21 Senast uppdaterad: 2014-11-19Bibliografiskt granskad
3. Dynamic Response of Flexible Pavements at Vehicle-Road Interaction
Öppna denna publikation i ny flik eller fönster >>Dynamic Response of Flexible Pavements at Vehicle-Road Interaction
2015 (Engelska)Ingår i: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, E-ISSN 2164-7402, Vol. 16, nr 2, s. 256-276Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In the present paper a robust and general computational framework that captures the dynamic response of flexible pavements to a moving vehicle is presented. A finite element method is relied upon in order to establish the response function for a linear viscoelastic pavement structure with dynamic effects taken into account. In order to characterise the dynamic loads induced on the pavement by moving traffic, a quarter car model combined with measured road profiles is used. Once both the traffic loads and pavement response functions are known, the stresses and strains induced in the pavement can be obtained in the frequency-wavenumber domain through the convolution procedure. The computational procedure developed is applied in the present study to evaluate the effect of the pavement surface roughness on the pavement structure response to truck traffic loading. Stress field parameters governing fracture initiation in asphalt layers are reported for two measured road roughness profiles. It is shown that the dynamic effects at vehicle-road interaction may have a profound influence on the stresses induced in flexible pavements; therefore, these effects need to be taken into account for the accurate estimation of the road resistance to cracking.

Ort, förlag, år, upplaga, sidor
Taylor & Francis, 2015
Nationell ämneskategori
Infrastrukturteknik
Identifikatorer
urn:nbn:se:kth:diva-145326 (URN)10.1080/14680629.2014.990402 (DOI)000353473800002 ()2-s2.0-84928209282 (Scopus ID)
Anmärkning

QC 20150805

Tillgänglig från: 2014-05-16 Skapad: 2014-05-16 Senast uppdaterad: 2017-12-05Bibliografiskt granskad

Open Access i DiVA

Thesis(495 kB)1327 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 495 kBChecksumma SHA-512
778b21fffb53aebac3cdbd5f02e2a8226574f7f8732f9ef4562579eca6d21d6a95d1b437aac482bfdaa6b266b8fbe95017109bc979a4e768f1ee3152df0f19a8
Typ fulltextMimetyp application/pdf

Sök vidare i DiVA

Av författaren/redaktören
Khavassefat, Parisa
Av organisationen
Väg- och banteknik
Infrastrukturteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 1327 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

isbn
urn-nbn

Altmetricpoäng

isbn
urn-nbn
Totalt: 1076 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf