Sigurdur Erlingsson


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Sigurdurs forskningsresultat


Tunga trafikens samhällsekonomiska kostnader: accelererade tester av tre vägkonstruktioner

Regeringen (Näringsdepartementet) har gett VTI uppdraget att ta fram och uppdatera kunskapsunderlag om trafikens samhällsekonomiska kostnader. En del i detta arbete är att ta fram ett säkrare underlag om effektsambanden mellan trafiklast (axellast)...

Instrumentation and performance modelling of heavy vehicle simulator tests

Flexible test road structures have been built and tested in accelerated pavement tests using a heavy vehicle simulator (HVS) at VTI in Sweden for 15 years. The objectives have been to investigate pavement responses and pavement performance...

Characterizing Permanent Deformation of Silty Sand Subgrades by Using a Model Based on...

A simple model for the prediction of permanent deformation of unbound pavement material was used to characterize the accumulation of permanent deformation of unsaturated silty subgrade soils from multistage repeated-load triaxial (RLT) tests. The...

Influence of post compaction on the moisture sensitive resilient modulus of unbound...

The impact of moisture on the resilient modulus (MR) of unbound granular materials (UGMs) was investigated based on repeated load triaxial (RLT) tests and considering the effect of post compaction (PC) from cyclic loading. Results showed that...

Modelling the moisture dependent permanent deformation behavior of unbound granular...

The impact of moisture on the permanent deformation (PD) behavior of unbound granular materials (UGMs) was investigated based on multistage (MS) repeated load triaxial (RLT) tests. Two UGMs with different particle size distributions were tested for...

Characterisation of permanent deformation of silty sand subgrades from multistage RLT...

In thin flexible pavements, unbound aggregate layers and subgrade, contribute largely to the rut formation of the pavement system. Therefore, realistic prediction of surface rutting requires models that can reliably capture the cumulative plastic...

Deformation Modelling of Instrumented Flexible Pavement Structure

A flexible test road structure was built and tested in an Accelerated Pavement Test (APT) using a Heavy Vehicle Simulator (HVS) to monitor its performance behaviour. In the tests more than one million load cycles were applied, but mid-way the water...

Viscoelastic Response Modelling of a Pavement under Moving Load

This paper demonstrates the application of a generalized layered linear viscoelastic (LVE) analysis for estimating flexible pavements' structural response. The procedure is based on the Multi-Layered Elastic Theory (MLET) and the...

Concrete pavement Falkenberg, Sweden: a 20 year review

The majority of the road network in Sweden consists of flexible pavements. Only a small fraction is rigid pavements and the most recent concrete structure was built ten years ago. This creates a problem as the national experience and knowledge in...

Characterization of heavy traffic axle load spectra for mechanistic-empirical pavement...

 Heavy traffic axle load spectrum (ALS) is  one of the key inputs for mechanistic-empirical analysis and design of pavement structures. Frequently, the entire ALS is aggregated into Equivalent Number of Single Axle Loads (ESAL) or assumed to have...

The Svappavaara road test sections: field coring and laboratory tests

Detta notat beskriver laboratorieprovningar av provkroppar tagna från fyra vägsträckor på E45 nära Svappavaara i Norrbottens kommun. Sträckorna ligger omkring 100 kilometer norr om polcirkeln i ett klimat som kännetecknas av långa kalla vintrar och...

Model for Seasonal Variation of Resilient Modulus in Silty Sand Subgrade Soil Evaluation...

One of the main input parameters in the mechanistic design and analysis of pavement systems, the stiffness of unbound pavement material usually is moisture dependent. As a result, most unbound pavement layers exhibit seasonal variations in stiffness...

Predicting permanent deformation behaviour of unbound granular materials

To reliably predict the permanent deformation behaviour of unbound granular materials (UGM) in a pavement structure, the material parameters of the constitutive models used in design should be evaluated using a multi-stage (MS) loading approach....

Evaluation of a permanent deformation model for asphalt concrete mixtures using...

This paper evaluates a mechanistic–empirical permanent strain model for asphalt concrete mixtures. The evaluation was carried out based on two different types of tests: an extra-large wheel-tracking (ELWT) test and a full-scale accelerated pavement...

Modelling of responses and rutting profile of a flexible pavement structure in a heavy...

A flexible test road structure was tested in a heavy vehicle simulator test to monitor its performance behaviour. Water was added to the structure half-way through the test. The raised water level had a significant effect, decreasing the resilient...

Permanent deformation characteristics of silty sand subgrades from multistage RLT tests

Rutting is one of the main forms of distresses in thin flexible pavement structures, often associated with accumulation of permanent deformation in unbound granular layers and subgrade soils under traffic loading. Realistic prediction of surface...

A model for predicting permanent deformation of unbound granular materials

A simple model has been proposed to characterise the accumulation of permanent deformation (PD) in unbound granular materials (UGMs) under cyclic loading of variable magnitudes. The model was developed based on multi-stage (MS) repeated-load...

Moisture influence on the resilient deformation behaviour of unbound granular materials

The influence of moisture on the resilient deformation properties of unbound granular materials was investigated based on repeated load triaxial tests. Results showed that the resilient modulus (MR) decreased with increasing moisture for a...

Numerical validation of viscoelastic responses of a pavement structure in a full-scale...

This paper demonstrates the application of a generalised layered linear viscoelastic (LVE) analysis for estimating the structural response of flexible pavements. A comparison of the direct layered viscoelastic responses with approximate solutions...

Resilient modulus of unsaturated silty sand subgrade

In flexible pavement structures, moduli of unbound granular layer materials and subgrade soils play an important role in the overall performance of the pavement system. The mechanical behaviour of the unbound layers is conventionally studied by...

Impact of groundwater level on the mechanical response of a flexible pavement structure:...

Ökad fuktkvot i vägars obundna lager kan inverka på vägkonstruktionens strukturella styvhet och minska dess livslängd. En fältstudie gjordes längs riksväg 126 nära Torpsbruk för att undersöka de obundna lagrens fuktkvoter på vägkonstruktionens...

Modelling Resilient Modulus Seasonal Variation of Silty Sand Subgrade Soils with Matric...

Resilient modulus of unbound materials is an important parameter in the mechanistic design of pavements. Although unbound layers are frequently in a partially saturated state, a total stress approach is conventionally used in modelling the material...

The Svappavaara road test sections: instrumentation

Denna rapport beskriver fyra nya instrumenterade vägsträckor på E45 nära samhället Svappavaara i Norrbottens län. I samband med att en ny malmgruvstäkt öppnades i Kaunisvaara 2012 kommer all malm som utvinns där att transporteras på det befintliga...

Resilient Modulus Modeling of Unsaturated Subgrade Soils with Matric Suction Control

Stiffness of pavement subgrade materials that is commonly determined by the resilient modulus parameter is an important component in the mechanistic design of flexible pavement structures. Environmental effects such as seasonal variations in...

Heavy Vehicle Simulator tests at VTI

Flexible test road structures have been built and tested in Accelerated Pavement Tests (APT) using a Heavy Vehicle Simulator (HVS) at VTI in Sweden for 15 years. The objectives have been to investigate pavement responses and pavement performance...

Influence of moisture on Resilient Deformation behaviour of Unbound Granular Materials

This study investigated the influence of moisture on the Resilient Deformation (RD) properties of Unbound Granular Materials (UGMs). A typical UGM used in pavement constructions with three different grain size distributions were tested with a range...

Moisture sensitive and stress dependent behavior of pavement unbound materials from in...

In an instrumented flexible pavement with subsurface drainage system, a field study was performed to investigate the influence of water on the response of the pavement structure. The drainage system of the structure was clogged during a three-month...

Evaluation of permanent deformation characteristics of unbound granular materials from...

Rutting in flexible pavements is often associated with permanent deformation of the unbound granular layer. The current permanent deformation models are only applicable to a single stress path in repeated load triaxial (RLT) tests. In this paper, a...

Evaluation of permanent deformation models for unbound granular materials using...

Mechanistic-empirical (M-E) pavement design methods have become the focus of modern pavement design procedure. One of the main distresses that M-E design methods attempt to control is permanent deformation (rutting). The objective of this paper is...

Investigation of a pavement structural behaviour during spring thaw using falling weight...

The response of an instrumented flexible pavement structure in southern Sweden, subjected to seasonal freeze–thaw cycles, was investigated during the spring thaw and the recovery periods in 2010. The pavement environmental condition was continuously...

Fast layered elastic response program for the analysis of flexible pavement structures

One of the key components in analysing pavement structural behaviour is the response model which is used to estimate the stresses, strains and displacements of the pavement structure subjected to the existing traffic, taking into account the...

The Influence of Groundwater Level on the Structural Behaviour of a Pavement Structure...

The effect of groundwater table level on the structural response of an instrumented flexible pavement in southern Sweden was studied using multilevel Falling Weight Deflectometer (FWD) testing. In order to raise the groundwater table level under the...

Terrasstabilisering: kunskapsdokument

Terrasstabilisering är en metod som används för att förbättra bärigheten vid grundläggning på finkorniga jordar med dålig bärighet. Metoden tillämpas för att förbättra bärigheten i terrassen till exempel för byggtransporter, men framförallt för att...

Klimatanpassning av vägkonstruktion, drift och underhåll

Klimatförändringarna är en realitet och påverkar vårt samhälle och därigenom även våra transporter. Genom att klimatanpassa transportsystemen blir systemen mer robusta och risken för transportstörningar blir mindre. För vägars konstruktion, drift...

Pavement structural behaviour during spring thaw: interpretation of FWD measurements by...

Vägnätet i stora delar av Norden är utsatt för relativt stor omgivningspåverkan under året. Under vinterhalvåret exponeras vägar för temperaturer under nollstrecket, vilket ger upphov till tjälbildning som penetrerar vägkonstruktionen och...

Modeling of flexible pavement structure behavior: Comparisons with Heavy Vehicle...

 A response model to be employed in a mechanistic-empirical pavement performance predictionmodel based on multilayer elastic theory has been developed. An iterative approach using a method of successiveover-relaxation of a stress dependency model is...

Pavement Unbound Materials Stiffness-Moisture Relationship during Spring Thaw

In the study presented here, the mechanical behaviour of a flexible pavement structure and its correlation to the pavement profile moisture condition was investigated during the spring thaw and the recovery periods. The study was carried out based...

Falling Weight Deflectometer Interpretation of Pavement Behaviour during Spring Thaw

A rural county road consisting of a thin flexible pavement structure in southern Sweden was instrumented in year 2009 in order to monitor changes in pavement characteristics caused by seasonal variations in environmental factors. Subsurface pavement...

Modeling performance prediction, based on rutting and cracking data

Roads are in a state of constant form of deterioration, due to factors such as climate and heavy traffic loads and are therefore constructed to have a certain lifetime before being maintained. To minimize the cost of construction and rehabilitation,...

Influence of heavy traffic lateral wander on pavement deterioration

Lateral wander of the traffic has an impact on the degradation development of pavements. This is usually not accounted for in the structural design process. Facilities with wide carriageways and broad shoulders tends to have relatively large lateral...

Mechanistic modelling of HVS flexible pavement structure

A response model to be employed in a mechanistic-empirical pavement performance prediction model based on multilayer elastic theory has been developed. An iterative approach using a method of successive over-relaxation of stress dependency model is...

Mechanistic performance modelling of rutting in pavement structures

A mechanistic empirical (M–E) approach has been developed and thereafter used to calculate the degradation behaviour of two arterial roads in Southern Sweden. The results were then compared with measurements from the Swedish long term pavement...

Moisture sensitivity of unbound granular materials

One of the main structural units in thin flexible pavement is the unbound aggregate base course. It contributes to the overall load spreading mechanism of the structure due to traffic loading and provides an underneath support to the asphalt...

Modeling of performance for road structure rutting and cracking based on data from the...

Roads are in a state of constant form of degradation due to factors such as climate and heavy traffic loads and are therefore constructed to have a certain lifetime before being reconstructed. To minimize the cost of construction and reconstruction,...

Impact of Water on the Response and Performance of a Pavement Structure in an Accelerated...

An accelerated load test using a Heavy Vehicle Simulator (HVS) was performed with the objective of investigating the response behaviour and performance of a commonly used pavement structure in Sweden. The structure consists of 10 cm asphalt bound...

Impact of water on the structural performance of pavements

An accelerated load test has been performed at VTI’s test facility in Sweden using a Heavy Vehicle Simulator (HVS). The objective was to investigate the response behaviour and performance of a commonly used flexible pavement structure in Sweden. The...

Characterization of heavy traffic on the Swedish road network

One of the key parameters in predicting the deterioration process of pavement structures is linked to the heavy traffic characteristics. The heavy traffic loading has been commonly expressed in pavement design methods through an equivalent number of...

On Forecasting the Resilient Modulus from the CBR Value of Granular Bases

The unbound granular materials (UGM), base and subbase layers, play an essential role in the overall structural performance of thin pavement structures. They show complex stress dependent elasto-plastic behaviour under external loading. Therefore...

Numerical Modelling of Thin Pavements Behaviour in Accelerated HVS Tests

Two thin road structures have been tested in accelerated testing by using a Heavy Vehicle Simulator (HVS). Both were surface dressed structures, one with a target 20 cm thick unbound base course layer and the other with the base divided into a 10 cm...

Resilient modulus modelling of unsaturated subgrade soils: laboratory investigation of...

In flexible pavement structures, stiffness of unbound granular layers and subgrade soil significantly contribute to the overall performance of the pavement system. The stiffness of pavement unbound materials is widely characterised by the resilient...