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A Novel Vibration-based Structure Health Monitoring Approach for the Shallow Buried Tunnel

Biao Zhou1,2,3, Xiong yao Xie1,2, Yeong Bin Yang4, Jing Cai Jiang3
Key Laboratory of Geotechnical & Underground Engineering, Ministry of Education, Tongji University, Shanghai 200092, China
Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
Department of civil Engineering, Tokushima University, Tokushima 770-8501, Japan
Department of civil Engineering, National Taiwan University, Taipei 10617, Taiwan, R.O. China

Computer Modeling in Engineering & Sciences 2012, 86(4), 321-348. https://doi.org/10.3970/cmes.2012.086.321

Abstract

The vibration-based SHM (Structure Health Monitoring) system has been successfully used in bridge and other surface civil infrastructure. However, its application in operation tunnels remains a big challenge. The reasons are discussed in this paper by comparing the vibration characteristics of the free tunnel structure and tunnel-soil coupled system. It is revealed that all the correlation characteristics of the free tunnel FRFs (Frequency Response Function spectrum) will vanish and be replaced by a coupled resonance frequency when the tunnel is surrounded by soil. The above statement is validated by field measurements. Moreover, the origin of this phenomenon is investigated by dispersion analysis based on a novel simulation model termed as TTMM (Timoshenko beam-Transfer Matrix Method). It is proved that the coupled resonance frequency occurs at the intersection of soil and free tunnel flexible wave mode dispersion curves. A simplified method is developed to determine the relationship between the tunnel Young's modulus and the coupled resonance frequency, which can be employed as an index for quantifying the tunnel global stiffness.

Keywords

Structure Health Monitoring, Timoshenko beam-Transfer Matrix Method Frequency Response Function spectrum free tunnel, tunnel-soil coupled system

Cite This Article

Zhou, B., Xie, X. Y., Yang, Y. B., Jiang, J. C. (2012). A Novel Vibration-based Structure Health Monitoring Approach for the Shallow Buried Tunnel. CMES-Computer Modeling in Engineering & Sciences, 86(4), 321–348.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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