MATEC Web Conf.
Volume 206, 20182018 The 3rd International Conference on Civil Engineering and Materials Science (ICCEMS 2018)
|Number of page(s)
|Civil and Structural Engineering
|19 September 2018
Influence of Dip Angle on Non-Anti-Symmetry Response of Tunnels in Bedding Rock Mass Due to Seismic qSV Wave Propagation
Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
2 School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
3 School of Transportation and Logistics, Southwest Jiaotong University, Chengdu, 610031, China
4 National Railway Train Diagram Research and Training Center, Southwest Jiao Tong University, Chengdu, 610031, China
By considering the transverse isotropic constitutive law of the bedding rock mass and using the wave method to analyze a high-speed railway tunnel in a bedding rock mass, we studied the influence of dip angle on non-anti-symmetry response of tunnels in bedding rock mass due to seismic qsv wave propagation. The results show that the non-anti-symmetry of tunnel seismic response does not obey linear relationship with the change of rock dip, and the variation law is segmental; the moment of seismic response is anti-symmetric strictly when the rock layer is vertical or horizontal, and it is non-anti-symmetrical when the rock layer is inclined; within each segmented interval, the non-anti-symmetry of seismic response increases first and then decreases with the increase of dip angle. This indicates that the influence of dip angle on the non-anti-symmetry of tunnel seismic response is significant.
© The Authors, published by EDP Sciences, 2018
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