Browsing by Author "Chataigner, Sylvain"
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Item Development and application of FASSTbridge solution to Jarama bridge (fast and effective solution for steel bridges lifetime extension)(International Association for Bridge and Structural Engineering (IABSE), 2018) Chataigner, Sylvain; Benzarti, Karim; Foret, Gilles; Caron, Jean François; Quiertant, Marc; Zalbide, Maria; Garcia, David; Calderon, Inigo; Pinero, Ignacio; Gemignani, Gianluca; Birtel, Veit; Lehmann, Frank; Wahbeh, Mazen; Boundouki, Rami; Martin, Elena; Sopena, Luis; Weidemueller, Mark; Fischer, Michael; Iborra, Concepcion; E&I SEGURAS Y RESILIENTES; Tecnalia Research & InnovationOne of the goals of sustainable development applied to bridge infrastructure is to provide bridge owners with strengthening solutions that may lead to an increase of existing structures service life. In the case of steel bridges, the assessment of the remaining service life is most often linked to the determination of the structural deterioration caused by corrosion and fatigue. Damage caused by fatigue is very difficult to assess before crack initiation, and is more bound to occur in old structures, for which the phenomenon was not taken into account in design before 1970. In addition, old steel materials present a more brittle behavior. In answer to these challenges, the FASSTbridge project, financed through European Infravation call, aimed at developing a pre-cracking fatigue assessment and strengthening methodology for steel bridges based on the technology of adhesively bonded composite. The proposed article presents some of the results of this project.Item Fasstbridge methodology and strengthening system: The Jarama Bridge experience(International Institute for FRP in Construction (IIFC), 2018) García-Sánchez, David; Wabeh, Mazen; Fischer, Michael; Chataigner, Sylvain; Sopeña, Luis; Birtel, Veit; Ferrier, Emmanuel; Benzarti, Karim; Caron, Jean-Francois; E&I SEGURAS Y RESILIENTESSteel bridges present frequent fatigue problems that reduce their load-carrying capacity and residual life. The increase of traffic flows and loads in the last decades has enhanced this problem, especially on ageing structures. This phenomenon is very dangerous because a conventional structural stress analysis might result in misleading conclusions about safety. In Europe, 15% of the 300 000 bridges are made of steel or concrete-steel composite structures, and approximately 68% of them need structural interventions. In the USA, figures are quite similar. Having this in mind, in November 2015, the ERA-NET Plus project FASSTBRIDGE was launched aiming at developing a complete methodology including a calculation method for assessing the remaining life of steel bridge in terms of fatigue, a designing and applying method for the strengthening intervention, and a strengthening system relying on the use of adhesively bonded CFRP (Carbon Fiber Reinforced Polymer). The paper presents the FASSTbridge methodology and strengthening system, which have been designed to work with codes based on The American Association of State Highway and Transportation Officials (AASHTO) or the European Union's Eurocode and its implementation in Jarama Bridge (Madrid, Spain).Item Preventive Fatigue Strengthening of Steel Structures with Bonded CFRP—Efficiency Demonstration on a Real Bridge(Springer Science and Business Media Deutschland GmbH, 2023) Benzarti, Karim; Chataigner, Sylvain; Wahbeh, Mazen; Boundouki, Rami; Martin, Elena; Sopena, Luis; Zalbide, Maria; Garcia-Sanchez, David; Birtel, Veit; Lehmann, Frank; Gemignani, Gianluca; Benmokrane, Brahim; Mohamed, Khaled; Farghaly, Ahmed; Mohamed, Hamdy; E&I SEGURAS Y RESILIENTESAn important objective of sustainable development applied to bridge infrastructure is to develop and deploy effective strengthening solutions, with a view to increasing the service life of existing structures. Steel bridges are prone to fatigue and their remaining service life can be evaluated after careful diagnosis of induced structural damages. However, it is generally difficult to assess the extend of damage caused by fatigue at an early stage before crack initiation. Besides, old structures are particularly vulnerable to fatigue as old steels exhibit a rather brittle behavior, but most design codes did not take into account fatigue effects before the 1970s. To address these issues, an assessment method and a preventive strengthening solution based on the use of adhesively bonded UHM (Ultra-High Modulus) CFRP (Carbon Fiber Reinforced Polymer) plates were developed and applied to an existing bridge for validation (Jarama bridge owned by the Community of Madrid in Spain). Strain measurement collected during load tests was analyzed to verify that the reinforcement works according to theoretical expectations, and different parameters were studied such as the influence of low traffic during CFRP installation. In the end, this field demonstration provided clear evidence of the efficiency of the developed solution.