CFRP composite retrofitting effect on the dynamic characteristics of arch dams |
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| Institution: | 1. Karadeniz Technical University, Department of Civil Engineering, Trabzon, Turkey;2. Gümü?hane University, Department of Civil Engineering, Gümü?hane, Turkey;3. Y?ld?z Technical University, Department of Civil Engineering, Istanbul, Turkey;1. School of Natural and Built Environments, University of South Australia, Adelaide, SA 5095, Australia;2. Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, QLD 4300, Australia;1. School of Natural and Built Environments, University of South Australia, Adelaide, SA 5095, Australia;2. Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, QLD 4300, Australia;1. Applied Physics Department, State University of Campinas, 13083-970, Campinas, SP, Brazil;2. Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA;3. Department of Civil, Environmental and Mechanical Engineering, Laboratory of Bio-Inspired and Graphene Nanomechanics, University of Trento, Via Mesiano, 77, 38123, Trento, Italy;4. Ket Lab, Italian Space Agency, Via del Politecnico snc, 00133, Rome, Italy;5. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, United Kingdom;1. School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom;2. AHDB Potatoes Sutton Bridge Crop Storage Research, East Bank, Sutton Bridge, Spalding P12 9YD, United Kingdom;1. INSA–Lyon, Laboratoire Vibrations-Acoustique (LVA), 25 bis, av. Jean Capelle, F-69621 Villeurbanne Cedex, France;2. GTM – Grup de recerca en Tecnologies Mèdia, La Salle, Universitat Ramon Llull, C/ Quatre Camins 30, 08022 Barcelona, Catalonia, Spain;1. Institute UTINAM, UMR CNRS 6213, University of Franche-Comte, 16 Gray Road, 25030 Besancon cedex, France;2. V.E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences, 1 Akademishian Zuev Square, 634021 Tomsk, Russia;3. National Research Tomsk State University, 36 Lenina Avenue, 634050 Tomsk, Russia |
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| Abstract: | The purpose of this study is to investigate the effect of retrofitting dynamic characteristics of a damaged laboratory arch dam model, subsequently repaired with high-strength structural mortar and strengthened with composite carbon fiber reinforced polymer. This study constructed in laboratory conditions is a prototype arch dam–reservoir–foundation model. Five test cases of ambient vibration on the arch dam model illustrate the changes in dynamic characteristics: natural frequency, mode shape, and damping ratio, before and after retrofitting. The ambient vibration tests collected data from the dam body during vibrations by natural excitations which provided small impacts and response signals from sensitivity accelerometers placed at crest points. Enhanced Frequency Domain Decomposition Method in the frequency domain extracts the experimental dynamic characteristics. At the end of the study, experimentally identified dynamic characteristics obtained from all test cases have been compared with each other. Apparently, after the retrofitting, the natural frequencies of the dam body increased considerably, demonstrating that the retrofitting, including repairing and strengthening is very effective on the flashback of initial dynamic characteristics. |
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| Keywords: | Ambient vibration test Carbon fiber reinforced polymer Dynamic characteristics Enhanced frequency domain decomposition Prototype arch dam–reservoir–foundation model Retrofitting Strengthening |
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