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

作     者：Meysam Fadaee I. Anastasopoulos G. Gazetas M.K. Jafari M. Kamalian 

作者机构：International Institute of Earthquake Engineering and Seismology School of Civil Engineering National Technical University 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2013年第12卷第3期

页      面：473-486页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

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 

主　　题：soil bentonite wall fault rupture soil-structure interaction seismic hazard mitigation tectonic deformation soil-foundation interaction 

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.