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首页> 外文期刊>Bulletin of earthquake engineering >Centrifuge modelling of normal fault-foundation interaction
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Centrifuge modelling of normal fault-foundation interaction

机译：正常断层-基础相互作用的离心机建模

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摘要

Earthquake fault ruptures may emerge at the ground surface causing large differential movements. When fault ruptures emerge at or adjacent to the position of existing foundations, significant damage can be caused. However, the study of recent faulting events revealed that in some circumstances the fault-rupture emergence is deflected by the presence of buildings leaving the buildings intact. A centrifuge modelling study has been conducted to investigate how normal faults interact with strip foundations which run parallel to the strike direction. The study confirms that fault rupture may be deviated by the presence of the foundation so that the foundation is protected from the most serious differential movements. However, whilst the fault propagates to the soil surface the foundation has to withstand initial movements before the final fault rupture emergence mechanism is activated. The centrifuge results suggest that it is the bearing pressure of the foundation which causes the deviation of the fault rather than the kinematic restraint of the foundation. The interaction between the earthquake fault and the shallow foundation depends on the foundation bearing pressure, foundation width, soil depth and position of the fault relative to the foundation and these aspects should be considered in design. Results from the tests are used to validate a series of finite element analyses as reported in an accompanying paper.
机译：地震断层破裂可能会出现在地面上，从而引起较大的差异运动。当断层破裂出现在现有地基的位置或附近时，会造成重大损坏。但是，对最近的断层事件的研究表明，在某些情况下，断层的出现是由于建筑物的存在而使建筑物完好无损的。进行了离心模型研究，以研究正常断层如何与平行于走向的条形基础相互作用。研究证实，地基的存在可能会导致断层破裂，从而保护地基免受最严重的差异运动的影响。但是，当断层传播到土壤表面时，在最终断层破裂出现机制启动之前，地基必须承受初始运动。离心结果表明，是基础的承压导致断层的偏离，而不是基础的运动学约束。地震断层与浅层地基之间的相互作用取决于地基承载力，地基宽度，土壤深度和断层相对于地基的位置，在设计时应考虑这些方面。测试结果用于验证一系列有限元分析，如随附论文中所述。

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