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Title |
Nonlinear Seismic Performance Evaluation of an Operating TBM(Tunnel Boring Machine) Tunnel
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Authors |
최병일(Byoung-Il Choi) ; 이동하(Dong-Ha Lee) ; 정진우(Jin-Woo Jung) ; 박시현(Si-Hyun Park) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.5.1 |
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Keywords |
지하수위; 연계해석; 재료 비선형; 내진성능평가; HS Small strain Stiffness 모델 Segment lining; Janssen model; Nonlinear model; Coupled analysis; Seismic performance evaluation |
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Abstract |
Recently, the TBM tunnel construction method has been in the spotlight as tunnel excavation under urban areas such as the Metropolitan Rapid Transit (GTX) has been actively carried out. Although the construction cost of the TBM tunnel is high, it is relatively free from noise and vibration compared to the NATM tunnel method, so it is well known to be a suitable construction method for application to the lower part of urban areas. In particular, when the stratum passes through the shallow section, it can have a great impact on existing upper structures and obstacles, so accurate numerical analysis considering various variables is required when designing the TBM tunnel. Unlike other tunnel construction methods, TBM tunnels build linings by assembling factory-made segments. Unlike NATM tunnels, segment lining has connections between segments, so how to the connection status between segments is reflected can have a significant impact on securing the reliability of analysis results. Therefore, in this paper, a segment joint model(Janssen Model) was applied to the lining for seismic analysis of the TBM tunnel, and the tunnel's behavioral characteristics were analyzed after numerical analysis using nonlinear models according to urban railway seismic design standards.
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