Abstract
Arches have been widely used in infrastructures such as bridges. This paper presents an experimental investigation of the out-of-plane dynamic instability of shallow circular arches under an in-plane central concentrated harmonic load owing to parametric resonance. The effects of central concentrated weight and the amplitude of the periodic load on the out-of-plane dynamic instability of arches are also investigated. It is found that as the weight increases, the bandwidth of the critical frequency region for out-of-plane dynamic instability decreases. It is also found that the bandwidth of the critical frequency region increases with an increase of the amplitude of the harmonic load. It is shown that the curve of the excitation frequency vs. amplitude of out-of-plane resonance bends toward the low frequency region and that the “traction” out-of-plane instability may occur owing to the “amplitude” perturbation.
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Acknowledgements
This investigation was sponsored by National Natural Science Foundation of China through a Research Project (No. 51578166) awarded to the first author, by Guangzhou government through a Yangcheng Fellowship (No. 1201541551), and by Technology Planning Project of Guangdong Province (No. 2016B050501004) awarded to the first author.
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Liu, A., Lu, H., Pi, YL., Huang, Y., Li, J. (2018). Out-of-Plane Parametric Resonance of Arches Under an In-Plane Central Harmonic Load. In: Bian, X., Chen, Y., Ye, X. (eds) Environmental Vibrations and Transportation Geodynamics. ISEV 2016. Springer, Singapore. https://doi.org/10.1007/978-981-10-4508-0_4
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DOI: https://doi.org/10.1007/978-981-10-4508-0_4
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