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Three-Dimensional Centrifuge and Numerical Modeling of Underground Structures Subjected to Normal Faulting
Earthquake-induced faulting may cause severe damage to adjacent underground structures such as pile foundations and tunnels. A reasonable distance to the free-field fault rupture outcrop is important for the safe design of pile foundations. Identifying the potential damage zone for a tunnel crossing a fault is also crucial. In this paper, three-dimensional centrifuge and numerical modeling of piles and tunnels subjected to normal faulting are reported and discussed. Propagation of fault rupture and induced pile displacements in centrifuge tests were captured and analyzed by the particle image velocimetry technique. The performance of a single pile, a pile group and a tunnel was monitored. A series of three-dimensional numerical back-analyses were performed using a strain-softening Mohr–Coulomb model in FLAC3D. Moreover, a numerical parametric study was conducted to examine the distance from the pile foundation to the free-field fault rupture outcrop. Furthermore, the effects of tunnel depth on the behavior of the tunnel were investigated by comparing two different tunnel depths. New insights from the centrifuge tests and numerical analyses are revealed and three characteristic zones namely safe, transition and translational can be identified.
Three-Dimensional Centrifuge and Numerical Modeling of Underground Structures Subjected to Normal Faulting
Earthquake-induced faulting may cause severe damage to adjacent underground structures such as pile foundations and tunnels. A reasonable distance to the free-field fault rupture outcrop is important for the safe design of pile foundations. Identifying the potential damage zone for a tunnel crossing a fault is also crucial. In this paper, three-dimensional centrifuge and numerical modeling of piles and tunnels subjected to normal faulting are reported and discussed. Propagation of fault rupture and induced pile displacements in centrifuge tests were captured and analyzed by the particle image velocimetry technique. The performance of a single pile, a pile group and a tunnel was monitored. A series of three-dimensional numerical back-analyses were performed using a strain-softening Mohr–Coulomb model in FLAC3D. Moreover, a numerical parametric study was conducted to examine the distance from the pile foundation to the free-field fault rupture outcrop. Furthermore, the effects of tunnel depth on the behavior of the tunnel were investigated by comparing two different tunnel depths. New insights from the centrifuge tests and numerical analyses are revealed and three characteristic zones namely safe, transition and translational can be identified.
Three-Dimensional Centrifuge and Numerical Modeling of Underground Structures Subjected to Normal Faulting
Springer Transactions in Civil and Environmental Engineering
Sitharam, T.G. (Herausgeber:in) / Jakka, Ravi (Herausgeber:in) / Kolathayar, Sreevalsa (Herausgeber:in) / Ng, Charles Wang Wai (Autor:in) / Cai, Qipeng (Autor:in) / Baghbanrezvan, Sina (Autor:in)
Latest Developments in Geotechnical Earthquake Engineering and Soil Dynamics ; Kapitel: 2 ; 11-40
02.07.2021
30 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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