Seismic performance and vulnerability analysis for bifurcated tunnels in soft soil

Jiang, Jiawei; Tao, Ran; Hesham El Naggar, M.; Liu, Hen; Du, Xiuli

doi:10.1016/j.compgeo.2024.106065

Cited by 13 publications

(1 citation statement)

References 40 publications

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“…In the case of tunnels, even if they do not collapse completely in an earthquake, extensive damage that affects their use may be difficult to repair [15]. Therefore, it is important to consider the seismic performance of tunnels [15][16][17] to ensure their safety and to meet the seismic requirements of shield tunnels in modern society.…”

Section: Introductionmentioning

confidence: 99%

Correlation Analysis of Tunnel Deformation and Internal Force in the Earthquake Based on Tunnel Inclination

Yang,

Liu,

Chen

2024

Buildings

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An increasing number of studies have shown that the seismic response of shield tunnels differs from that of aboveground structures. While the seismic response of aboveground structures is mainly influenced by the peak acceleration and frequency of the earthquake, the seismic response of shield tunnels is more influenced by the ground displacement due to the surrounding soil layers. In this study, it is not appropriate to follow the seismic concept of aboveground structures. Dynamic time-history analysis is a powerful and effective method to study the seismic response of tunnels in the typical subway in this paper. The analysis results show that the overall levelling of the tunnel will not affect the tunnel too much, and the seismic response of the tunnel is mainly related to the relative displacement of the ground around the tunnel. The analysis results show that the internal force of the tunnel and the tunnel inclination have a good linear relationship, and the tunnel inclination can be used to measure the magnitude of the seismic response of the tunnel. In the seismic design of shield tunnels, the inclination of the tunnel can be taken into account to evaluate the change in the internal forces of the tunnel during earthquakes, which avoids the need for complex dynamic time-history analysis and greatly improves the efficiency of the seismic design of shield tunnels.

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