Soil bentonite wall protects foundation from thrust faulting: analyses and experiment 被引量：1

Soil bentonite wall protects foundation from thrust faulting: analyses and experiment

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摘要 When seismic thrust faults emerge on the ground surface, they are particularly damaging to buildings, bridges and lifelines that lie on the rupture path. To protect a structure founded on a rigid raft, a thick diaphragm-type soil bentonite wall （SBW） is installed in front of and near the foundation, at sufficient depth to intercept the propagating fault rupture. Extensive numerical analyses, verified against reduced-scale （1 g） split box physical model tests, reveal that such a wall, thanks to its high deformability and low shear resistance, ＂absorbs＂ the compressive thrust of the fault and forces the rupture to deviate upwards along its length. As a consequence, the foundation is left essentially intact. The effectiveness of SBW is demonstrated to depend on the exact location of the emerging fault and the magnitude of the fault offset. When the latter is large, the unprotected foundation experiences intolerable rigid-body rotation even if the foundation structural distress is not substantial. When seismic thrust faults emerge on the ground surface, they are particularly damaging to buildings, bridges and lifelines that lie on the rupture path. To protect a structure founded on a rigid raft, a thick diaphragm-type soil bentonite wall （SBW） is installed in front of and near the foundation, at sufficient depth to intercept the propagating fault rupture. Extensive numerical analyses, verified against reduced-scale （1 g） split box physical model tests, reveal that such a wall, thanks to its high deformability and low shear resistance, ＂absorbs＂ the compressive thrust of the fault and forces the rupture to deviate upwards along its length. As a consequence, the foundation is left essentially intact. The effectiveness of SBW is demonstrated to depend on the exact location of the emerging fault and the magnitude of the fault offset. When the latter is large, the unprotected foundation experiences intolerable rigid-body rotation even if the foundation structural distress is not substantial.

作者 Meysam Fadaee I. Anastasopoulos G. Gazetas M.K. Jafari M. Kamalian

机构地区 International Institute of Earthquake Engineering and Seismology School of Civil Engineering

出处《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2013年第3期473-486,共14页 地震工程与工程振动（英文刊）

基金 the technical and financial support of IIEES under the research project "Evaluation of possible measures to construct in vicinity of active fault" the financial support under the research project "DARE", by the European Research Council’s (ERC) "IDEAS" Programme, in Support of Frontier Research under contract/number ERC–2–9–AdG228254–DARE

关键词 soil bentonite wall fault rupture soil-structure interaction seismic hazard mitigation tectonic deformation soil-foundation interaction soil bentonite wall fault rupture soil-structure interaction seismic hazard mitigation tectonic deformation soil-foundation interaction

分类号 TU435 [建筑科学—岩土工程]

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1Anastasopoulos I, Antonakos G and Gazetas G (2010), “Slab Foundations Subjected to Thrust Faulting: Parametric Analysis and Simplified Design Method,” Soil Dynamics and Earthquake Engineering, 30(10): 912-924.
2Anastasopoulos I and Gazetas G (2005), “Design Against Fault Rupture: Methodology and Applications in Greece,” Proceedings of the 1st Greece - Japan Workshop: Seismic Design, Observation and Retrofit of Foundations, Athens, October 11-12, 2005, pp. 345-366.
3Anastasopoulos I and Gazetas G (2007a), “Foundation-structure Systems over a Rupturing Normal Fault: Part I. Observations after the Kocaeli 1999 Earthquake,” Bulletin of Earthquake Engineering, 5(3): 253—275.
4Anastasopoulos I and Gazetas G (2007b), ’’Behavior of Structure foundation Systems over a Rupturing Normal Fault: Part II. Analysis of the Kocaeli Case Histories,” Bulletin of Earthquake Engineering, 5(3): 277-301.
5Anastasopoulos I and Gazetas G (2010), “Analysis of Cut-and-cover Tunnels against Large Tectonic Deformation,” Bulletin of Earthquake Engineering, 8(2): 283-307.
6Anastasopoulos I, Gazetas G, Bransby F, Davies MCR and El Nahas A (2007), “Fault Rupture Propagation through Sand: Finite Element Analysis and Validation.
7through Centrifuge Experiments,” Journal of Geotechnical and Geo Environmental Engineering, ASCE, 133(8): 943-958.
8Anastasopoulos I, Gazetas G, Bransby MF, Davies MCR and El Nahas A (2009), “Normal Fault Rupture Interaction with Strip Foundations,” Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 135(3): 359-370.
9Anastasopoulos I, Gazetas G, Drosos V, Georgarakos T and Kourkoulis R (2008a), “Design of Bridges against Large Tectonic Deformation,” Earthquake Engineering and Engineering Vibration, 7(4): 345-368.
10Anastasopoulos I, Gerolymos N, Drossos V, Kourkoulis R. Georgarakos P and Gazetas G (2008b), “Behaviour of Deep Immersed Tunnel under Combined Major Fault Rupture and Strong Seismic Shaking,” Bulletin of Earthquake Engineering, 6(2): 213-239.