Structural Health Monitoring of a Smart Composite Bridge Using Guided Waves and Acoustic Emission Techniques

Abstract : This paper is dealing with the development of a structural health monitoring (SHM) system implemented on a composite footbridge during the regional project ÒPays de la Loireî called DECID2. The SHM system was made out of complementary techniques: strain sensors based on optical fibers (out of concern in this present work) and ultrasonic techniques that are presented in this document. Due to the huge size of the composite bridge (20 m * 3 m), only its most critical areas are monitored as the assembling parts and the most solicited areas. To access the structural integrity of the footbridge, two complementary monitoring strategies were presented in this paper: a real-time acoustic emission monitoring system to detect fibre breaks and a monitoring system using guided waves to evaluate the resin degradation. Both of these SHM systems use the same miniature ultrasonic patches that are used alternately as acoustic emission sensors and as ultrasonic guided waves actuators. The first step of this work was to develop these patches, and then to set up each monitoring systems and characterize their damage sensitivity. Finally, two composite footbridges were built at the EMC2 Technocampus and IFSTTAR in France to serve as demonstrators.
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Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014
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Nicolas Terrien, Fethi Dhamene, Hasnae Zejli, Monssef Drissi Habti. Structural Health Monitoring of a Smart Composite Bridge Using Guided Waves and Acoustic Emission Techniques. Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014. 〈hal-01021218〉

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