Analysis of Seismic Factors to Tunnels in the Earthquake

Abstract:

Underground structures have mechanical characteristics and seismic responses very different from common structures on the ground in the earthquake due to the constraints of the surrounding soil. Tunnel destruction has occurred many times in domestic and international earthquake. In order to study seismic factors and failure mechanism of tunnels in the earthquake, numerical simulation of the seismic responses of the circular shield tunnel is carried on. Harmonic P-waves and S-waves are entered to make the tunnel vibrate and deform. Viscous-spring artificial boundary condition is applied in the numerical simulation to consider the semi-infinity of soil. The elastic modulus of soil, the frequency of harmonic waves and the depth of the tunnel are regarded as the main factors. The seismic responses such as stress and relative displacement are analyzed in different parameters to get the failure mechanism of circular tunnel.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 2182-2189
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.2182
• Online since: May 2012
• Authors: Yan Zou, Li Ping Jing, Hai Feng Sun, Yong Qiang Li
• Keywords: Failure Mode, Seismic Damage, Shear Wave Velocity, Underground Structure, Viscous-Spring Artificial Boundary Condition

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