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Non-stationary Response of Flexible pavements to Moving Vehicles
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.ORCID iD: 0000-0003-2434-6957
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.ORCID iD: 0000-0002-0596-228X
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.ORCID iD: 0000-0003-0889-6078
2016 (English)In: The international journal of pavement engineering, ISSN 1029-8436, E-ISSN 1477-268X, Vol. 17, no 5, 458-470 p.Article in journal (Refereed) Published
Abstract [en]

In this paper the pavement surface deterioration is investigated based on field measurements of surface roughness profiles obtained in Sweden. A predictive function for surface deterioration, based on average gradient of yearly measurements of the road surface profile in Swedish road network, is proposed. In order to characterise the dynamic loads induced on the pavement by moving traffic a quarter car model is used. Afterwards a non-stationary stochastic approach is used to obtain the yearly response of the pavement to moving loads. The solution is in frequency-wavenumber domain and is given for a non-stationary random case as the pavement surface deteriorates in pavement service life influencing thus the magnitude of the dynamic loads induced by the vehicles. The effect of pavement surface evolution on the stress state induced in the pavement by moving traffic is examined for a specific case of quarter car model and pavement structure. The results showed approximately a 100% increase in the dynamic component of stresses induced in the pavement.

Place, publisher, year, edition, pages
Taylor & Francis, 2016. Vol. 17, no 5, 458-470 p.
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-156041DOI: 10.1080/10298436.2014.993394ISI: 000371595500009OAI: oai:DiVA.org:kth-156041DiVA: diva2:764208
Note

Updated from Accepted to Published. QC 20160401

Available from: 2014-11-18 Created: 2014-11-18 Last updated: 2017-12-05Bibliographically approved
In thesis
1. Vehicle-Pavement Interaction
Open this publication in new window or tab >>Vehicle-Pavement Interaction
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Several aspects of vehicle-pavement interaction have been studied and discussed in this thesis. Initially the pavement response is studied through a quasi-static and a dynamic computationally efficient framework under moving traffic loads. Subsequently, a non-stationary stochastic solution has been developed in order to account for the effect of pavement surface deterioration on pavement service life.The quasi-static procedure is based on a superposition principle and is computationally favourable, as it requires only a 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.In the dynamic approach the pavement roughness and vehicle suspension system are linked to a dynamic pavement model in order to account for the dynamic effects of vehicle-pavement interaction on pavement response. A finite element method is employed in order to establish the response function for a linear viscoelastic pavement structure with dynamic effects taken into account. The developed computational procedure is applied to evaluate the effect of the pavement surface roughness on the pavement structure response to truck traffic loadings.Furthermore, the deterioration trends for the flexible pavement surface have been investigated based on field measurements of longitudinal profiles in Sweden. A predictive function is proposed for surface deterioration that is based on the average gradient of yearly measurements of the road surface profiles in Swedish road network. The developed dynamic framework is further elaborated to a non-stationary stochastic approach. The response of the flexible pavement is given for a non-stationary random case as the pavement surface deteriorates in pavement service life, thus influencing the magnitude of the dynamic loads induced by the vehicles. The effect of pavement surface evolution on the stress state induced in the pavement by moving traffic is examined numerically.

Finally the effect of surface deterioration on pavement service life has been investigated and discussed in the thesis by incorporating the proposed prognostic surface deterioration model into a ME design framework. The results are discussed for different case studies with different traffic regimes. It was indicated that the predicted pavement service life decreases considerably when the extra dynamic loads, as a result of pavement surface deterioration, has been taken into account. Furthermore, the effect of performing a predictive rehabilitation process (i.e. resurfacing) has been studied by employing a LCC framework. The application of preventive maintenance was shown to be effective, especially when the deterioration rate is high.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2014. x, 39 p.
Series
TRITA-TSC-PHD, 14:009
Keyword
Finite element, Viscoelasticity, Moving load, Dynamic axle loads, Road roughness, Flexible pavement, Stochastic
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:kth:diva-156045 (URN)978-91-87353-57-4 (ISBN)
Public defence
2014-12-11, Kollegiesalen, Brinellvägen 8, KTH, Stockholm, 09:00 (English)
Opponent
Supervisors
Note

QC 20141119

Available from: 2014-11-19 Created: 2014-11-18 Last updated: 2014-11-19Bibliographically approved

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Khavassefat, ParisaJelagin, DenisBirgisson, Björn

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