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Title: A FEM-based numerical study of responses of underground openings subject to plane, cylindrical, compressive and tensile waves
Authors: Liao, ZY
Lam, NM
Zhu, JB
Keywords: Underground opening
Rock Joint
Peak particle velocity
Issue Date: 2016
Publisher: CRC Press, Taylor & Francis Group
Source: In H Li, J Li,, Q Zhang & J Zhao (Eds.), Rock dynamics : from research to engineering : Proceedings of the 2nd International Conference on Rock Dynamics and Applications, p. 355-360. Boca Raton: CRC Press, Taylor & Francis Group, 2016 How to cite?
Abstract: © 2016 Taylor & Francis Group, London.A FEM-based numerical study is carried out to investigate the dynamic responses of underground openings in jointed rock masses. The heterogeneity and damage process of rocks are taken consideration in the numerical study. Effects of joint normal stiffness, joint spacing, joint orientation, amplitude of applied stress wave, cylindrical wave and tensile wave on the measured Peak Particle Velocity (PPV) around the tunnel are addressed. The simulation results show that the existence of joints has great influence on the stability of the underground tunnel. In addition, the cylindrical wave decays quickly due to both geometrical attenuation and joint reflection. The PPVs around the tunnel are highly dependent on the source location of the cylindrical wave and the wave amplitude. Furthermore, the large-amplitude tensile wave is difficult to transmit across the joints, because of the caused opening of joints. However, for the shallow buried tunnel, the reflected tensile waves from the ground surface may still lead to the instability of tunnel.
Description: 2nd International Conference on Rock Dynamics and Applications (RocDyn), May 18-19, 2016, Suzhou, People's Republic of China
ISBN: 978-1-315-47081-8
Appears in Collections:Conference Paper

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