As part of the project management of the Auvergne rail restoration plan carried out by the Sociét... more As part of the project management of the Auvergne rail restoration plan carried out by the Société d’études techniques et économiques (SETEC) on behalf of the French Rail Network (SNCFR, Société Nationale des Chemins de Fer Réseau), Diadès was responsible for the diagnosis evaluation of four wrought-iron nineteenth-century viaducts located on the Lavaufranche–Saint-Germain des Fossés line. Once the viaducts’ archived documents had been analysed, a complete diagnostic and investigative programme was carried out, including taking dimensional measurements and samples, conducting detailed inspections, anti-corrosion diagnosis, spectrocolorimetry analysis of the gathered data and recalculation of the fatigue of the structures. These results were then used to create a procedure for the restoration and painting of two viaducts while addressing the problem of the presence of lead in the original paintwork.The works were carried out on the Rouzat Viaduct by Lassarat, managed by Diadès.
HAL (Le Centre pour la Communication Scientifique Directe), Jul 8, 2012
Detecting and assessing the severity of structural damage is one major objective when monitoring ... more Detecting and assessing the severity of structural damage is one major objective when monitoring a bridge. In particular, when some degradation phenomena threaten the bridge safety, the goal can be to assess monitoring critical components, which allows checking a safety threshold is not reached until some repair/rehabilitation actions are performed. This paper describes an overall monitoring-based decision process, illustrated with the case of a suspension bridge in France, the Teil Bridge near Montelimar. Following the sudden fracture of a cable near the anchorage, the bridge was totally closed to traffic. Several investigations were carried out to better understand the reason of the fracture occurrence and assess the performance of other anchorages. The bridge safety was ensured by strengthening each anchorage, starting an acoustic monitoring program (during one year), and defining warning thresholds. Meanwhile, several other experimental investigations (in situ load tests, chemical analysis of concrete samples) were conducted to estimate the residual structural service life and define the bridge repair actions. Finally, a major rehabilitation program with the change of all cables and anchorages was decided. The example of the Teil Bridge illustrates the progress of monitoring information integration in a bridge management system.
Bridge maintenance, safety and management, Jun 21, 2012
Detecting and assessing the severity of structural damage is one major objective when monitoring ... more Detecting and assessing the severity of structural damage is one major objective when monitoring a bridge. In particular, when some degradation phenomena threaten the bridge safety, the goal can be to assess monitoring critical components, which allows checking a safety threshold is not reached until some repair/rehabilitation actions are performed. This paper describes an overall monitoring-based decision process, illustrated with the case of a suspension bridge in France, the Teil Bridge near Montelimar. Following the sudden fracture of a cable near the anchorage, the bridge was totally closed to traffic. Several investigations were carried out to better understand the reason of the fracture occurrence and assess the performance of other anchorages. The bridge safety was ensured by strengthening each anchorage, starting an acoustic monitoring program (during one year), and defining warning thresholds. Meanwhile, several other experimental investigations (in situ load tests, chemical analysis of concrete samples) were conducted to estimate the residual structural service life and define the bridge repair actions. Finally, a major rehabilitation program with the change of all cables and anchorages was decided. The example of the Teil Bridge illustrates the progress of monitoring information integration in a bridge management system.
... Paris, France B. Tonnoir Centre d'Etudes Techniques de l'Equipement Nord-Picardie, ... more ... Paris, France B. Tonnoir Centre d'Etudes Techniques de l'Equipement Nord-Picardie, Lille, France R. Leconte Centre d'Etudes Techniques de l'Equipement de Lyon, Bron, France V. Barbier Centre d'Etudes Techniques de l'Equipement de l'Est, Nancy, France TheVIPP ...
Long-span bridges require specific construction techniques and a constantly renewed design, eithe... more Long-span bridges require specific construction techniques and a constantly renewed design, either due to the evolution of materials, techniques and knowledge, or due to a variable geometry and/or typology that calls for design adaptations.These exceptional structures generally fall outside the existing regulations and classic frameworks for monitoring and maintenance, whatever the country. In that sense, they require, from the moment they are commissioned, a particular expertise and approach for their continuous monitoring, calling in particular for the production of risk analysis matrices, sensitivity analyses (wind, earthquake, assembly fatigue, etc.), exhaustive maintenance manuals adapted to each structure, regular campaigns of targeted non-destructive tests, while having recourse to particular means of access associated with different types of inspection carried out by qualified and experienced inspectors.In order to ensure that these structures behave well over time, they are generally monitored, which requires individualized use of the data acquired by the SHMS, whose program can be adapted a posteriori after a period of learning about the actual functioning of the structure.To complete this monitoring, it is necessary to implement a specific follow-up of the durability of materials and more specifically of reinforced concrete, to carry out updated digital twins associated with adapted management software.All this specific approach is necessary to have a clear and exhaustive vision of the condition of these structures and the follow-up of their good ageing over time, which sometimes differs significantly from what is foreseen at the time of the design; the objective being in particular to ensure the safety of the operation and the users and to engage the maintenance works at the right time and at the least cost, for a durability which must exceed 120 years for these exceptional and unique structures.Through emblematic examples, we propose to present these specific approaches implemented on large structures, whether pathological or not, and the proposed management strategies.
Long-span bridges require specific construction techniques and a constantly renewed design, eithe... more Long-span bridges require specific construction techniques and a constantly renewed design, either due to the evolution of materials, techniques and knowledge, or due to a variable geometry and/or typology that calls for design adaptations.These exceptional structures generally fall outside the existing regulations and classic frameworks for monitoring and maintenance, whatever the country. In that sense, they require, from the moment they are commissioned, a particular expertise and approach for their continuous monitoring, calling in particular for the production of risk analysis matrices, sensitivity analyses (wind, earthquake, assembly fatigue, etc.), exhaustive maintenance manuals adapted to each structure, regular campaigns of targeted non-destructive tests, while having recourse to particular means of access associated with different types of inspection carried out by qualified and experienced inspectors.In order to ensure that these structures behave well over time, they are...
The Corniche Kennedy is an emblematic road of the city of Marseilles in France. Located on the se... more The Corniche Kennedy is an emblematic road of the city of Marseilles in France. Located on the seafront, it was built in the 19th century and widened in the 1960s to create a corbelled pedestrian promenade. Its widening structure, made of slabs resting on corbels anchored in a retaining wall or on crossing structures, has been subjected for more than 60 years to a very aggressive marine environment and presents many damages. After having carried out the diagnosis of the structure, the Infrastructure Department of the Metropole of Aix-Marseille-Provence selected the engineers of the Setec Group to carry out the complete project management for the rehabilitation of the Corniche Kennedy. Between 2018 and 2022, the Corniche Kennedy underwent major rehabilitation work, using modern techniques to prevent and treat the main pathology of the structure, the corrosion. This article presents all the steps of the rehabilitation of the Corniche Kennedy from diagnosis to maintenance of the struct...
As part of the project management of the Auvergne rail plan carried out by the Société d’études t... more As part of the project management of the Auvergne rail plan carried out by the Société d’études techniques et économiques (SETEC) on behalf of the French Rail Network (SNCFR, Société Nationale des Chemins de Fer Réseau), Diadès was responsible for the diagnosis of four wrought-iron nineteenth-century viaducts located on the Lavaufranche–Saint-Germain des Fossés line. The comprehensive studies were carried out on the structural condition of these four Eiffel-type rail viaducts, 145 years after they commenced operation. Once the viaducts’ archives had been analysed, a complete diagnostic and investigative programme was carried out, including taking dimensional measurements and samples, conducting detailed inspections, anti-corrosion diagnosis, spectrocolorimetry, analysis of the gathered data and recalculation of the fatigue of the structures. These results were then used to create a plan for the restoration and painting of two viaducts while addressing the problem of the presence of ...
L'instrumentation des poutres du pont mixte de Saint-Vallier (Drome) a ete mise en place afin... more L'instrumentation des poutres du pont mixte de Saint-Vallier (Drome) a ete mise en place afin d'etudier le comportement d'un assemblage soude sous l'effet d'une surcharge routiere. Les mesures effectuees sont completees par une etude du trafic routier permettant le calcul de l'endommagement a la fatigue de cet assemblage. Par la determination des histogrammes de variations de contraintes dans l'assemblage puis par le calcul de l'endommagement unitaire pour un detail de classe 45 (presence de semelles additionnelles), cette etude a permis d'estimer la duree de vie de l'assemblage instrumente, a partir d'un trafic routier mesure, a 80 ans environ. (Titre en anglais : Estimation of the fatigue lifetime of a welded joint on the Saint-Vallier Bridge (Drome)).
Detecting and assessing the severity of structural damage is one major objective when monitoring ... more Detecting and assessing the severity of structural damage is one major objective when monitoring a bridge. In particular, when some degradation phenomena threaten the bridge safety, the goal can be to assess monitoring critical components, which allows checking a safety threshold is not reached until some repair/rehabilitation actions are performed. This paper describes an overall monitoring-based decision process, illustrated with the case of a suspension bridge in France, the Teil Bridge near Montelimar. Following the sudden fracture of a cable near the anchorage, the bridge was totally closed to traffic. Several investigations were carried out to better understand the reason of the fracture occurrence and assess the performance of other anchorages. The bridge safety was ensured by strengthening each anchorage, starting an acoustic monitoring program (during one year), and defining warning thresholds. Meanwhile, several other experimental investigations (in situ load tests, chemical analysis of concrete samples) were conducted to estimate the residual structural service life and define the bridge repair actions. Finally, a major rehabilitation program with the change of all cables and anchorages was decided. The example of the Teil Bridge illustrates the progress of monitoring information integration in a bridge management system.
This motorway viaduc near Lille is a connection to the Channel Tunnel and supports most of the he... more This motorway viaduc near Lille is a connection to the Channel Tunnel and supports most of the heavy trafic between Paris and Dunkerque. It supports the EC1 ENV classe 1 load model and it is the first experimental application of this load model in France. The structure is a two girder steel-concrete composite bridge. An additionnal bracing makes the structure stronger to resist the loads without increasing the costs too much. The bridge was built in 1999 and opened to trafic during 2000. This report was written for the Mikti Research Project. http://irex-web.pagesperso-orange.fr/mikti.htm
As part of the project management of the Auvergne rail restoration plan carried out by the Sociét... more As part of the project management of the Auvergne rail restoration plan carried out by the Société d’études techniques et économiques (SETEC) on behalf of the French Rail Network (SNCFR, Société Nationale des Chemins de Fer Réseau), Diadès was responsible for the diagnosis evaluation of four wrought-iron nineteenth-century viaducts located on the Lavaufranche–Saint-Germain des Fossés line. Once the viaducts’ archived documents had been analysed, a complete diagnostic and investigative programme was carried out, including taking dimensional measurements and samples, conducting detailed inspections, anti-corrosion diagnosis, spectrocolorimetry analysis of the gathered data and recalculation of the fatigue of the structures. These results were then used to create a procedure for the restoration and painting of two viaducts while addressing the problem of the presence of lead in the original paintwork.The works were carried out on the Rouzat Viaduct by Lassarat, managed by Diadès.
As part of the project management of the Auvergne rail restoration plan carried out by the Sociét... more As part of the project management of the Auvergne rail restoration plan carried out by the Société d’études techniques et économiques (SETEC) on behalf of the French Rail Network (SNCFR, Société Nationale des Chemins de Fer Réseau), Diadès was responsible for the diagnosis evaluation of four wrought-iron nineteenth-century viaducts located on the Lavaufranche–Saint-Germain des Fossés line. Once the viaducts’ archived documents had been analysed, a complete diagnostic and investigative programme was carried out, including taking dimensional measurements and samples, conducting detailed inspections, anti-corrosion diagnosis, spectrocolorimetry analysis of the gathered data and recalculation of the fatigue of the structures. These results were then used to create a procedure for the restoration and painting of two viaducts while addressing the problem of the presence of lead in the original paintwork.The works were carried out on the Rouzat Viaduct by Lassarat, managed by Diadès.
HAL (Le Centre pour la Communication Scientifique Directe), Jul 8, 2012
Detecting and assessing the severity of structural damage is one major objective when monitoring ... more Detecting and assessing the severity of structural damage is one major objective when monitoring a bridge. In particular, when some degradation phenomena threaten the bridge safety, the goal can be to assess monitoring critical components, which allows checking a safety threshold is not reached until some repair/rehabilitation actions are performed. This paper describes an overall monitoring-based decision process, illustrated with the case of a suspension bridge in France, the Teil Bridge near Montelimar. Following the sudden fracture of a cable near the anchorage, the bridge was totally closed to traffic. Several investigations were carried out to better understand the reason of the fracture occurrence and assess the performance of other anchorages. The bridge safety was ensured by strengthening each anchorage, starting an acoustic monitoring program (during one year), and defining warning thresholds. Meanwhile, several other experimental investigations (in situ load tests, chemical analysis of concrete samples) were conducted to estimate the residual structural service life and define the bridge repair actions. Finally, a major rehabilitation program with the change of all cables and anchorages was decided. The example of the Teil Bridge illustrates the progress of monitoring information integration in a bridge management system.
Bridge maintenance, safety and management, Jun 21, 2012
Detecting and assessing the severity of structural damage is one major objective when monitoring ... more Detecting and assessing the severity of structural damage is one major objective when monitoring a bridge. In particular, when some degradation phenomena threaten the bridge safety, the goal can be to assess monitoring critical components, which allows checking a safety threshold is not reached until some repair/rehabilitation actions are performed. This paper describes an overall monitoring-based decision process, illustrated with the case of a suspension bridge in France, the Teil Bridge near Montelimar. Following the sudden fracture of a cable near the anchorage, the bridge was totally closed to traffic. Several investigations were carried out to better understand the reason of the fracture occurrence and assess the performance of other anchorages. The bridge safety was ensured by strengthening each anchorage, starting an acoustic monitoring program (during one year), and defining warning thresholds. Meanwhile, several other experimental investigations (in situ load tests, chemical analysis of concrete samples) were conducted to estimate the residual structural service life and define the bridge repair actions. Finally, a major rehabilitation program with the change of all cables and anchorages was decided. The example of the Teil Bridge illustrates the progress of monitoring information integration in a bridge management system.
... Paris, France B. Tonnoir Centre d'Etudes Techniques de l'Equipement Nord-Picardie, ... more ... Paris, France B. Tonnoir Centre d'Etudes Techniques de l'Equipement Nord-Picardie, Lille, France R. Leconte Centre d'Etudes Techniques de l'Equipement de Lyon, Bron, France V. Barbier Centre d'Etudes Techniques de l'Equipement de l'Est, Nancy, France TheVIPP ...
Long-span bridges require specific construction techniques and a constantly renewed design, eithe... more Long-span bridges require specific construction techniques and a constantly renewed design, either due to the evolution of materials, techniques and knowledge, or due to a variable geometry and/or typology that calls for design adaptations.These exceptional structures generally fall outside the existing regulations and classic frameworks for monitoring and maintenance, whatever the country. In that sense, they require, from the moment they are commissioned, a particular expertise and approach for their continuous monitoring, calling in particular for the production of risk analysis matrices, sensitivity analyses (wind, earthquake, assembly fatigue, etc.), exhaustive maintenance manuals adapted to each structure, regular campaigns of targeted non-destructive tests, while having recourse to particular means of access associated with different types of inspection carried out by qualified and experienced inspectors.In order to ensure that these structures behave well over time, they are generally monitored, which requires individualized use of the data acquired by the SHMS, whose program can be adapted a posteriori after a period of learning about the actual functioning of the structure.To complete this monitoring, it is necessary to implement a specific follow-up of the durability of materials and more specifically of reinforced concrete, to carry out updated digital twins associated with adapted management software.All this specific approach is necessary to have a clear and exhaustive vision of the condition of these structures and the follow-up of their good ageing over time, which sometimes differs significantly from what is foreseen at the time of the design; the objective being in particular to ensure the safety of the operation and the users and to engage the maintenance works at the right time and at the least cost, for a durability which must exceed 120 years for these exceptional and unique structures.Through emblematic examples, we propose to present these specific approaches implemented on large structures, whether pathological or not, and the proposed management strategies.
Long-span bridges require specific construction techniques and a constantly renewed design, eithe... more Long-span bridges require specific construction techniques and a constantly renewed design, either due to the evolution of materials, techniques and knowledge, or due to a variable geometry and/or typology that calls for design adaptations.These exceptional structures generally fall outside the existing regulations and classic frameworks for monitoring and maintenance, whatever the country. In that sense, they require, from the moment they are commissioned, a particular expertise and approach for their continuous monitoring, calling in particular for the production of risk analysis matrices, sensitivity analyses (wind, earthquake, assembly fatigue, etc.), exhaustive maintenance manuals adapted to each structure, regular campaigns of targeted non-destructive tests, while having recourse to particular means of access associated with different types of inspection carried out by qualified and experienced inspectors.In order to ensure that these structures behave well over time, they are...
The Corniche Kennedy is an emblematic road of the city of Marseilles in France. Located on the se... more The Corniche Kennedy is an emblematic road of the city of Marseilles in France. Located on the seafront, it was built in the 19th century and widened in the 1960s to create a corbelled pedestrian promenade. Its widening structure, made of slabs resting on corbels anchored in a retaining wall or on crossing structures, has been subjected for more than 60 years to a very aggressive marine environment and presents many damages. After having carried out the diagnosis of the structure, the Infrastructure Department of the Metropole of Aix-Marseille-Provence selected the engineers of the Setec Group to carry out the complete project management for the rehabilitation of the Corniche Kennedy. Between 2018 and 2022, the Corniche Kennedy underwent major rehabilitation work, using modern techniques to prevent and treat the main pathology of the structure, the corrosion. This article presents all the steps of the rehabilitation of the Corniche Kennedy from diagnosis to maintenance of the struct...
As part of the project management of the Auvergne rail plan carried out by the Société d’études t... more As part of the project management of the Auvergne rail plan carried out by the Société d’études techniques et économiques (SETEC) on behalf of the French Rail Network (SNCFR, Société Nationale des Chemins de Fer Réseau), Diadès was responsible for the diagnosis of four wrought-iron nineteenth-century viaducts located on the Lavaufranche–Saint-Germain des Fossés line. The comprehensive studies were carried out on the structural condition of these four Eiffel-type rail viaducts, 145 years after they commenced operation. Once the viaducts’ archives had been analysed, a complete diagnostic and investigative programme was carried out, including taking dimensional measurements and samples, conducting detailed inspections, anti-corrosion diagnosis, spectrocolorimetry, analysis of the gathered data and recalculation of the fatigue of the structures. These results were then used to create a plan for the restoration and painting of two viaducts while addressing the problem of the presence of ...
L'instrumentation des poutres du pont mixte de Saint-Vallier (Drome) a ete mise en place afin... more L'instrumentation des poutres du pont mixte de Saint-Vallier (Drome) a ete mise en place afin d'etudier le comportement d'un assemblage soude sous l'effet d'une surcharge routiere. Les mesures effectuees sont completees par une etude du trafic routier permettant le calcul de l'endommagement a la fatigue de cet assemblage. Par la determination des histogrammes de variations de contraintes dans l'assemblage puis par le calcul de l'endommagement unitaire pour un detail de classe 45 (presence de semelles additionnelles), cette etude a permis d'estimer la duree de vie de l'assemblage instrumente, a partir d'un trafic routier mesure, a 80 ans environ. (Titre en anglais : Estimation of the fatigue lifetime of a welded joint on the Saint-Vallier Bridge (Drome)).
Detecting and assessing the severity of structural damage is one major objective when monitoring ... more Detecting and assessing the severity of structural damage is one major objective when monitoring a bridge. In particular, when some degradation phenomena threaten the bridge safety, the goal can be to assess monitoring critical components, which allows checking a safety threshold is not reached until some repair/rehabilitation actions are performed. This paper describes an overall monitoring-based decision process, illustrated with the case of a suspension bridge in France, the Teil Bridge near Montelimar. Following the sudden fracture of a cable near the anchorage, the bridge was totally closed to traffic. Several investigations were carried out to better understand the reason of the fracture occurrence and assess the performance of other anchorages. The bridge safety was ensured by strengthening each anchorage, starting an acoustic monitoring program (during one year), and defining warning thresholds. Meanwhile, several other experimental investigations (in situ load tests, chemical analysis of concrete samples) were conducted to estimate the residual structural service life and define the bridge repair actions. Finally, a major rehabilitation program with the change of all cables and anchorages was decided. The example of the Teil Bridge illustrates the progress of monitoring information integration in a bridge management system.
This motorway viaduc near Lille is a connection to the Channel Tunnel and supports most of the he... more This motorway viaduc near Lille is a connection to the Channel Tunnel and supports most of the heavy trafic between Paris and Dunkerque. It supports the EC1 ENV classe 1 load model and it is the first experimental application of this load model in France. The structure is a two girder steel-concrete composite bridge. An additionnal bracing makes the structure stronger to resist the loads without increasing the costs too much. The bridge was built in 1999 and opened to trafic during 2000. This report was written for the Mikti Research Project. http://irex-web.pagesperso-orange.fr/mikti.htm
As part of the project management of the Auvergne rail restoration plan carried out by the Sociét... more As part of the project management of the Auvergne rail restoration plan carried out by the Société d’études techniques et économiques (SETEC) on behalf of the French Rail Network (SNCFR, Société Nationale des Chemins de Fer Réseau), Diadès was responsible for the diagnosis evaluation of four wrought-iron nineteenth-century viaducts located on the Lavaufranche–Saint-Germain des Fossés line. Once the viaducts’ archived documents had been analysed, a complete diagnostic and investigative programme was carried out, including taking dimensional measurements and samples, conducting detailed inspections, anti-corrosion diagnosis, spectrocolorimetry analysis of the gathered data and recalculation of the fatigue of the structures. These results were then used to create a procedure for the restoration and painting of two viaducts while addressing the problem of the presence of lead in the original paintwork.The works were carried out on the Rouzat Viaduct by Lassarat, managed by Diadès.
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