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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Performance of geotechnical seismic isolation system using rubber-soil mixtures in centrifuge testing
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Performance of geotechnical seismic isolation system using rubber-soil mixtures in centrifuge testing

机译：橡胶土混合物在离心机测试中的岩土地震隔离系统的性能

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摘要

Geotechnical seismic isolation (GSI) system involves the dynamic interaction between structure and low-modulus foundation material, such as rubber-soil mixtures (RSM). Whilst numerical studies have been carried out to demonstrate the potential benefits of GSI-RSM system, experimental research is indispensable for confirming its isolation mechanism and effectiveness in reducing structural demand. In this regard, centrifuge modelling with an earthquake shaker under an acceleration field of 50 g adopted in this study can mimic the actual nonlinear dynamic response characteristics of RSM and subsoil in a coupled soil-foundation-structure system. This is the first time the performance of GSI-RSM system was examined in a geotechnical centrifuge. It was found that an average of 40-50% reduction of structural demand can be achieved. The increase in both the horizontal and rotation responses of the foundation was also evidenced. The unique augmented rocking mechanism with reversible foundation rotation was highlighted.
机译：岩土地震隔离（GSI）系统涉及结构和低模量基础材料之间的动态相互作用，例如橡胶 - 土壤混合物（RSM）。虽然已经进行了数值研究以证明GSI-RSM系统的潜在益处，但实验研究对于确认其隔离机制和减少结构需求的有效性是必不可少的。在这方面，在本研究采用的50克的加速场下与地震振动器与地震振动器的离心建模可以模拟RSM和底层在耦合的土对基础结构系统中的实际非线性动态响应特性。这是第一次在岩土内离心机中检查GSI-RSM系统的性能。发现可以实现平均40-50％的结构需求降低。还证明了基础的水平和旋转响应的增加。突出了具有可逆基础旋转的独特增强摇摆机制。

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