Analysis of Reinforced Concrete Buildings Using Multipath Lidar

Philippe Guéguen 1 Matthieu Valla 2 Béatrice Augère 2 Didier Goular 2
1 ISTerre - Institut des Sciences de la Terre
2 Chatillon - ONERA - The French Aerospace Lab
Abstract : This paper compares the modal analysis of reinforced-concrete buildings obtained using sensitive velocimeters and coherent LIDAR. Ambient vibrations are recorded by these two systems and processing using operative modal analysis method for getting building frequency and mode shapes. Real-scale trials applied to five buildings located at Grenoble (France) are presented. The efficiency and reliability of the Lidar is discussed and the modal parameters measured by Lidar at a range of 200m and by in-situ velocimeters are compared. The results are in good agreement and allow us to conclude on the ability of the coherent Lidar to assess modal parameters of existing buildings at long range and without any retroreflectors placed on the structures. The results open new perspectives for remotely testing buildings, without getting inside, facilitating dynamic analysis of buildings for earthquake engineering applications.
Keywords : Sensor systems and networks Civil engineering SHM applications Modal analysis
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Communication dans un congrès
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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Philippe Guéguen, Matthieu Valla, Béatrice Augère, Didier Goular. Analysis of Reinforced Concrete Buildings Using Multipath Lidar. Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014. 〈hal-01021064〉

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