Gunnstein Thomas Frøseth
73594550
Materialteknisk, 3-104, Gløshaugen, Richard Birkelands vei 1a
Om
Estimering av gjenstående levetid av jernbanebruer i stål
Det norske jernbanenettverket ble hovedsakelig bygd mellom 1850 og 1965 og består av over 2700 bruer. Omtrent 1000 av disse bruene er stål konstruksjoner og ingen av disse bruene ble bygd for dagens aksellaster og toghastigheter. I tillegg ble stålbruene sjelden vurdert mot utmattingsbrudd. Selvom det er iverksatt tiltak for å sikre umiddelbare behov og sikker drift, finnes det spørsmål rundt bruenes faktiske driftstilstand og gjenstående levetid. Nøyaktig estimering av tilstand og levetid av disse jernbanebruene er essensielt for å kunne drifte og ivareta jernbanenettverket med hensyn til økonomiske, sosiale og miljømessige krav.
Feltmålinger er den mest presise måten å vurdere tilstanden til bruer, men på grunn av det store antallet bruer er det ikke mulig å gjennomføre målinger på alle bruene. Numeriske simuleringer er effektive verktøy som kan bli brukt til å predikere responsen til disse konstruksjonene, men nøyaktigheten er avhengig av kompleksiteten til modellen og usikkerheten rundt parametrene som går inn i simuleringene. Ved å kombinere feltmålinger sammen med numeriske simuleringer får man det beste fra begge verdener og er nødvendig for å oppnå nøyaktig og fullstendig estimering av tilstand og levetid av de norske jernbanebruene.
Hovedmål
- Forbedre prediksjon av gjenstående levetid i jernbanebruer i stål
- Kvantifisere modellusikkerhet og feil i numeriske modeller av jernbanebruer
- Bestemme historiske og nåværende laster i det norske jernbanenettverket
- Benytte og forbedre modelloppdateringsmetodikk for simuleringer av togpassasjer på jernbanebruer.
Forskningsgruppe
Publikasjoner
2025
-
Lu, Ziyue;
Jiang, Tengjiao;
Slavič, Janko;
Frøseth, Gunnstein Thomas.
(2025)
A multilevel bridge corrosion detection method by transformer-based segmentation in a stitched view.
Journal of Civil Structural Health Monitoring (JCSHM)
Vitenskapelig artikkel
2024
-
Kaviani, Nadia;
Rønnquist, Nils Erik Anders;
Frøseth, Gunnstein Thomas;
Lau Leong Lee, Albert;
Ricci, Stefano;
Rizzetto, Luca.
(2024)
Detecting lateral track irregularities by onboard measurements of lateral acceleration and displacements and machine learning algorithms.
Ingegneria Ferroviaria
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Wang, Shaorui;
Petersen, Øyvind Wiig;
Rønnquist, Anders.
(2024)
A 6-DOF camera motion correction method using IMU sensors for photogrammetry and optical measurements.
Mechanical systems and signal processing
Vitenskapelig artikkel
-
Chen, Shaoyao;
Frøseth, Gunnstein Thomas;
Derosa, Stefano;
Lau, Albert;
Rønnquist, Anders.
(2024)
Railway Catenary Condition Monitoring: A Systematic Mapping of Recent Research.
Sensors
Vitenskapelig oversiktsartikkel/review
-
Dederichs, Anno Christian;
Frøseth, Gunnstein Thomas;
Øiseth, Ole Andre.
(2024)
Experimental comparison of three automatic operational modal analysis algorithms on suspension and floating bridges.
Mechanical systems and signal processing
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders;
Kong, Xuan;
Deng, Lu.
(2024)
A visual inspection and diagnosis system for bridge rivets based on a convolutional neural network.
Computer-Aided Civil and Infrastructure Engineering
Vitenskapelig artikkel
-
Aursand, Mads;
Frøseth, Gunnstein Thomas;
Haagensen, Per Jahn;
Skallerud, Bjørn Helge.
(2024)
Crack growth in high strength mooring line steel under variable amplitude loading.
Marine Structures
Vitenskapelig artikkel
-
Zakharenko, Mariia;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2024)
Imprecise structural reliability analysis of steel railway bridges using p-boxes and a fatigue probabilistic approach.
Structure and Infrastructure Engineering
Vitenskapelig artikkel
-
Hu, Zhicheng;
Lau, Albert;
Dai, Jian;
Frøseth, Gunnstein Thomas.
(2024)
Identification of optimal accelerometer placement on trains for railway switch wear monitoring via multibody simulation.
Frontiers in Built Environment
Vitenskapelig artikkel
2023
-
Luo, Kui;
Kong, Xuan;
Wang, Xiuyan;
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2023)
Cable vibration measurement based on broad-band phase-based motion magnification and line tracking algorithm.
Mechanical systems and signal processing
Vitenskapelig artikkel
-
Song, Yang;
Wang, Hongrui;
Frøseth, Gunnstein Thomas;
Nåvik, Petter Juell;
Liu, Zhigang;
Rønnquist, Anders.
(2023)
Surrogate modelling of railway pantograph-catenary interaction using deep Long-Short-Term-Memory neural networks.
Mechanism and Machine Theory
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2023)
A robust bridge rivet identification method using deep learning and computer vision.
Engineering structures
Vitenskapelig artikkel
2022
-
Zakharenko, Maria;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2022)
How conservative is the Norwegian fatigue load model for service life estimation of railway bridges?.
Structure and Infrastructure Engineering
Vitenskapelig artikkel
-
Svendsen, Bjørn Thomas;
Øiseth, Ole Andre;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2022)
A hybrid structural health monitoring approach for damage detection in steel bridges under simulated environmental conditions using numerical and experimental data.
Structural Health Monitoring
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Nåvik, Petter Juell;
Rønnquist, Anders.
(2022)
Assessment of pantograph-catenary interaction in a railway overlap section via a novel optical-based method.
Mechanism and Machine Theory
Vitenskapelig artikkel
-
Zakharenko, Maria;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2022)
Train Classification Using a Weigh-in-Motion System and Associated Algorithms to Determine Fatigue Loads.
Sensors
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Rønnquist, Anders;
Song, Yang;
Frøseth, Gunnstein Thomas;
Nåvik, Petter Juell.
(2022)
A detailed investigation of uplift and damping of a railway catenary span in traffic using a vision-based line-tracking system.
Journal of Sound and Vibration
Vitenskapelig artikkel
2021
-
Song, Yang;
Jiang, Tengjiao;
Rønnquist, Anders;
Nåvik, Petter Juell;
Frøseth, Gunnstein Thomas.
(2021)
The Effects of Spatially Distributed Damping on the Contact Force in Railway Pantograph-Catenary Interactions
.
IEEE Transactions on Instrumentation and Measurement
Vitenskapelig artikkel
-
Petersen, Øyvind Wiig;
Frøseth, Gunnstein Thomas;
Øiseth, Ole Andre.
(2021)
Design and deployment of a monitoring system on a long-span suspension bridge.
Proceedings of the International Conference on Structural Health Monitoring of Intelligent Infrastructure
Vitenskapelig artikkel
-
Svendsen, Bjørn Thomas;
Petersen, Øyvind Wiig;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2021)
Improved finite element model updating of a full-scale steel bridge using sensitivity analysis.
Structure and Infrastructure Engineering
Vitenskapelig artikkel
-
Svendsen, Bjørn Thomas;
Frøseth, Gunnstein Thomas;
Øiseth, Ole Andre;
Rønnquist, Anders.
(2021)
A data-based structural health monitoring approach for damage detection in steel bridges using experimental data.
Journal of Civil Structural Health Monitoring (JCSHM)
Vitenskapelig artikkel
2020
-
Svendsen, Bjørn Thomas;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2020)
Damage Detection Applied to a Full-Scale Steel Bridge Using Temporal Momens.
Shock and Vibration
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Nåvik, Petter Juell;
Rønnquist, Anders.
(2020)
Operational Displacement Estimations of Railway Catenary Systems by Photogrammetry and the Integration of Acceleration Time Series.
The international Journal of railway technology
Vitenskapelig artikkel
-
Petersen, Øyvind Wiig;
Øiseth, Ole Andre;
Frøseth, Gunnstein Thomas.
(2020)
Design of a monitoring system for a long-span suspension bridge: optimal sensor placement.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Zakharenko, Maria;
Frøseth, Gunnstein Thomas;
Rønnquist, Nils Erik Anders.
(2020)
HOW CONSERVATIVE IS THE NORWEGIAN FATIGUE LOAD MODEL FOR SERVICE LIFE ESTIMATION OF RAILWAY BRIDGES?.
Proceedings of the International Conference on Structural Dynamic , EURODYN
Sammendrag/abstract
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders;
Fagerholt, Egil.
(2020)
A robust line-tracking photogrammetry method for uplift measurements of railway catenary systems in noisy backgrounds.
Mechanical systems and signal processing
Vitenskapelig artikkel
2019
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2019)
Load model of historic traffic for fatigue life estimation of Norwegian railway bridges.
Engineering structures
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2019)
Evolution of load conditions in the Norwegian railway network and imprecision of historic railway load data.
Structure and Infrastructure Engineering
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2019)
Finding the train composition causing greatest fatigue damage in railway bridges by Late Acceptance Hill Climbing.
Engineering structures
Vitenskapelig artikkel
2018
-
Svendsen, Bjørn Thomas;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2018)
Inspection of steel bridges by modal hammer from bridge deck only.
CRC Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Svendsen, Bjørn Thomas;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2018)
Damage detection of steel bridge by numerical simulations and measurements.
CRC Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2017
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders;
Cantero, Daniel;
Øiseth, Ole.
(2017)
Influence line extraction by deconvolution in the frequency domain.
Computers & structures
Vitenskapelig artikkel
2016
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders;
Øiseth, Ole.
(2016)
Operational modal analysis and model updating of Riveted steel bridge.
Conference Proceedings of the Society for Experimental Mechanics Series
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Nåvik, Petter Røe;
Rønnquist, Anders.
(2016)
Close Range Photogrammetry for Measuring the Response of a Railway Catenary System.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2015
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2015)
System Reliability Analysis of Steel Railway Bridge Based on Historic Rolling Stock Records.
Tampere University of Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Tidsskriftspublikasjoner
-
Lu, Ziyue;
Jiang, Tengjiao;
Slavič, Janko;
Frøseth, Gunnstein Thomas.
(2025)
A multilevel bridge corrosion detection method by transformer-based segmentation in a stitched view.
Journal of Civil Structural Health Monitoring (JCSHM)
Vitenskapelig artikkel
-
Kaviani, Nadia;
Rønnquist, Nils Erik Anders;
Frøseth, Gunnstein Thomas;
Lau Leong Lee, Albert;
Ricci, Stefano;
Rizzetto, Luca.
(2024)
Detecting lateral track irregularities by onboard measurements of lateral acceleration and displacements and machine learning algorithms.
Ingegneria Ferroviaria
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Wang, Shaorui;
Petersen, Øyvind Wiig;
Rønnquist, Anders.
(2024)
A 6-DOF camera motion correction method using IMU sensors for photogrammetry and optical measurements.
Mechanical systems and signal processing
Vitenskapelig artikkel
-
Chen, Shaoyao;
Frøseth, Gunnstein Thomas;
Derosa, Stefano;
Lau, Albert;
Rønnquist, Anders.
(2024)
Railway Catenary Condition Monitoring: A Systematic Mapping of Recent Research.
Sensors
Vitenskapelig oversiktsartikkel/review
-
Dederichs, Anno Christian;
Frøseth, Gunnstein Thomas;
Øiseth, Ole Andre.
(2024)
Experimental comparison of three automatic operational modal analysis algorithms on suspension and floating bridges.
Mechanical systems and signal processing
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders;
Kong, Xuan;
Deng, Lu.
(2024)
A visual inspection and diagnosis system for bridge rivets based on a convolutional neural network.
Computer-Aided Civil and Infrastructure Engineering
Vitenskapelig artikkel
-
Aursand, Mads;
Frøseth, Gunnstein Thomas;
Haagensen, Per Jahn;
Skallerud, Bjørn Helge.
(2024)
Crack growth in high strength mooring line steel under variable amplitude loading.
Marine Structures
Vitenskapelig artikkel
-
Zakharenko, Mariia;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2024)
Imprecise structural reliability analysis of steel railway bridges using p-boxes and a fatigue probabilistic approach.
Structure and Infrastructure Engineering
Vitenskapelig artikkel
-
Hu, Zhicheng;
Lau, Albert;
Dai, Jian;
Frøseth, Gunnstein Thomas.
(2024)
Identification of optimal accelerometer placement on trains for railway switch wear monitoring via multibody simulation.
Frontiers in Built Environment
Vitenskapelig artikkel
-
Luo, Kui;
Kong, Xuan;
Wang, Xiuyan;
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2023)
Cable vibration measurement based on broad-band phase-based motion magnification and line tracking algorithm.
Mechanical systems and signal processing
Vitenskapelig artikkel
-
Song, Yang;
Wang, Hongrui;
Frøseth, Gunnstein Thomas;
Nåvik, Petter Juell;
Liu, Zhigang;
Rønnquist, Anders.
(2023)
Surrogate modelling of railway pantograph-catenary interaction using deep Long-Short-Term-Memory neural networks.
Mechanism and Machine Theory
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2023)
A robust bridge rivet identification method using deep learning and computer vision.
Engineering structures
Vitenskapelig artikkel
-
Zakharenko, Maria;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2022)
How conservative is the Norwegian fatigue load model for service life estimation of railway bridges?.
Structure and Infrastructure Engineering
Vitenskapelig artikkel
-
Svendsen, Bjørn Thomas;
Øiseth, Ole Andre;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2022)
A hybrid structural health monitoring approach for damage detection in steel bridges under simulated environmental conditions using numerical and experimental data.
Structural Health Monitoring
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Nåvik, Petter Juell;
Rønnquist, Anders.
(2022)
Assessment of pantograph-catenary interaction in a railway overlap section via a novel optical-based method.
Mechanism and Machine Theory
Vitenskapelig artikkel
-
Zakharenko, Maria;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2022)
Train Classification Using a Weigh-in-Motion System and Associated Algorithms to Determine Fatigue Loads.
Sensors
Vitenskapelig artikkel
-
Jiang, Tengjiao;
Rønnquist, Anders;
Song, Yang;
Frøseth, Gunnstein Thomas;
Nåvik, Petter Juell.
(2022)
A detailed investigation of uplift and damping of a railway catenary span in traffic using a vision-based line-tracking system.
Journal of Sound and Vibration
Vitenskapelig artikkel
-
Song, Yang;
Jiang, Tengjiao;
Rønnquist, Anders;
Nåvik, Petter Juell;
Frøseth, Gunnstein Thomas.
(2021)
The Effects of Spatially Distributed Damping on the Contact Force in Railway Pantograph-Catenary Interactions
.
IEEE Transactions on Instrumentation and Measurement
Vitenskapelig artikkel
-
Petersen, Øyvind Wiig;
Frøseth, Gunnstein Thomas;
Øiseth, Ole Andre.
(2021)
Design and deployment of a monitoring system on a long-span suspension bridge.
Proceedings of the International Conference on Structural Health Monitoring of Intelligent Infrastructure
Vitenskapelig artikkel
-
Svendsen, Bjørn Thomas;
Petersen, Øyvind Wiig;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2021)
Improved finite element model updating of a full-scale steel bridge using sensitivity analysis.
Structure and Infrastructure Engineering
Vitenskapelig artikkel
-
Svendsen, Bjørn Thomas;
Frøseth, Gunnstein Thomas;
Øiseth, Ole Andre;
Rønnquist, Anders.
(2021)
A data-based structural health monitoring approach for damage detection in steel bridges using experimental data.
Journal of Civil Structural Health Monitoring (JCSHM)
Vitenskapelig artikkel
-
Svendsen, Bjørn Thomas;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2020)
Damage Detection Applied to a Full-Scale Steel Bridge Using Temporal Momens.
Shock and Vibration
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Nåvik, Petter Juell;
Rønnquist, Anders.
(2020)
Operational Displacement Estimations of Railway Catenary Systems by Photogrammetry and the Integration of Acceleration Time Series.
The international Journal of railway technology
Vitenskapelig artikkel
-
Zakharenko, Maria;
Frøseth, Gunnstein Thomas;
Rønnquist, Nils Erik Anders.
(2020)
HOW CONSERVATIVE IS THE NORWEGIAN FATIGUE LOAD MODEL FOR SERVICE LIFE ESTIMATION OF RAILWAY BRIDGES?.
Proceedings of the International Conference on Structural Dynamic , EURODYN
Sammendrag/abstract
-
Jiang, Tengjiao;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders;
Fagerholt, Egil.
(2020)
A robust line-tracking photogrammetry method for uplift measurements of railway catenary systems in noisy backgrounds.
Mechanical systems and signal processing
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2019)
Load model of historic traffic for fatigue life estimation of Norwegian railway bridges.
Engineering structures
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2019)
Evolution of load conditions in the Norwegian railway network and imprecision of historic railway load data.
Structure and Infrastructure Engineering
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2019)
Finding the train composition causing greatest fatigue damage in railway bridges by Late Acceptance Hill Climbing.
Engineering structures
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders;
Cantero, Daniel;
Øiseth, Ole.
(2017)
Influence line extraction by deconvolution in the frequency domain.
Computers & structures
Vitenskapelig artikkel
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders;
Øiseth, Ole.
(2016)
Operational modal analysis and model updating of Riveted steel bridge.
Conference Proceedings of the Society for Experimental Mechanics Series
Vitenskapelig artikkel
Del av bok/rapport
-
Petersen, Øyvind Wiig;
Øiseth, Ole Andre;
Frøseth, Gunnstein Thomas.
(2020)
Design of a monitoring system for a long-span suspension bridge: optimal sensor placement.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Svendsen, Bjørn Thomas;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2018)
Inspection of steel bridges by modal hammer from bridge deck only.
CRC Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Svendsen, Bjørn Thomas;
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2018)
Damage detection of steel bridge by numerical simulations and measurements.
CRC Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Frøseth, Gunnstein Thomas;
Nåvik, Petter Røe;
Rønnquist, Anders.
(2016)
Close Range Photogrammetry for Measuring the Response of a Railway Catenary System.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Frøseth, Gunnstein Thomas;
Rønnquist, Anders.
(2015)
System Reliability Analysis of Steel Railway Bridge Based on Historic Rolling Stock Records.
Tampere University of Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Undervisning
Emner
Formidling
2018
-
Vitenskapelig foredragRønnquist, Anders; Frøseth, Gunnstein Thomas; Svendsen, Bjørn Thomas. (2018) Hell Bridge Test Arena - Sensor Testing, Damage Detection and Inspections of Steel Bridges; Challenges and Opportunities. MAC XXXVI - Conference and Exposition on Structural Dynamics 2018-02-12 - 2018-02-15
-
Vitenskapelig foredragRønnquist, Anders; Svendsen, Bjørn Thomas; Frøseth, Gunnstein Thomas. (2018) Steel Bridge Test Arena exploring sensor supported inspections; Challenges and Opportunities. 20th Nordic Seminar on Railway Technology 2018-06-12 - 2018-06-13
-
Vitenskapelig foredragRønnquist, Anders; Frøseth, Gunnstein Thomas; Svendsen, Bjørn Thomas. (2018) Hell Bridge Test Arena – Improve monitoring and damage detection in sensor assisted inspections of steel bridges. Railways 2018 2018-07-03 - 2018-07-09
2017
-
Vitenskapelig foredragFrøseth, Gunnstein Thomas; Rønnquist, Anders; Øiseth, Ole. (2017) Prediction error in strain response in finite element simulations with moving load formulation of train passages of open deck steel bridges. First International Conference on Rail Transportation 2017-07-10 -
2016
-
Vitenskapelig foredragFrøseth, Gunnstein Thomas; Nåvik, Petter Røe; Rønnquist, Anders. (2016) Close Range Photogrammetry for Measuring the Response of a Railway Catenary System. Civil-Comp Press THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE , Sardinia 2016-04-05 - 2016-04-08
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IntervjuFrøseth, Gunnstein Thomas; Rønnquist, Anders. (2016) Forskere skal få den gamle brua på Hell til å kollapse. Adressavisen Adressavisen [Avis] 2016-06-29
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IntervjuFrøseth, Gunnstein Thomas; Rønnquist, Anders. (2016) BrupåHell. Stjørdalsnytt Stjørdalsnytt [Avis] 2016-06-29
2015
-
Vitenskapelig foredragFrøseth, Gunnstein Thomas; Rønnquist, Anders. (2015) System Reliability Analysis of Steel Railway Bridge Based on Historic Rolling Stock Records. Tampere University of Technology 13th Nordic Steel Construction Conference , Tampere 2015-09-23 - 2015-09-25