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Real-time dynamic hybrid testing for soil-structure interaction analysis

机译：土-结构相互作用实时动态混合试验

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摘要

Simulating dynamic soil-structure interaction (SSI) problems is a challenge when using a shaking table because of the semi-infinity of soil foundations. This paper develops real-time dynamic hybrid testing (RTDHT) for SSI problems in order to consider the radiation damping effect of the semi-infinite soil foundation using a shaking table. Based on the substructure concept, the superstructure is physically tested and the semi-infinite foundation is numerically simulated. Thus, the response of the entire system considering the dynamic SSI is obtained by coupling the numerical calculation of the soil and the physical test of the superstructure. A two-story shear frame on a rigid foundation was first tested to verify the developed RTDHT system, in which the top story was modeled as the physical substructure and the bottom story was the numerical substructure. The RTDHT for a two-story structure mounted on soil foundation was then carried out on a shaking table while the foundation was numerically simulated using a lumped parameter model. The dynamic responses, including acceleration and shear force, were obtained under soft and hard soil conditions. The results show that the soil-structure interaction should be reasonably taken into account in the shaking table testing for structures.
机译：使用振动台时，由于土壤基础的半无限性，模拟动态土壤-结构相互作用（SSI）问题是一个挑战。为了研究半无限大地基的振动衰减效应，本文针对SSI问题开发了实时动态混合试验（RTDHT）。基于子结构概念，对上部结构进行了物理测试，并对半无限基础进行了数值模拟。因此，通过结合土壤的数值计算和上部结构的物理测试，可以获得考虑了动态SSI的整个系统的响应。首先测试了在刚性基础上的两层剪切框架，以验证已开发的RTDHT系统，其中顶层被建模为物理子结构，底层被建模为数值子结构。然后在振动台上对安装在土壤基础上的两层结构进行RTDHT，同时使用集总参数模型对基础进行数值模拟。在软土和硬土条件下都可获得动力响应，包括加速度和剪切力。结果表明，结构振动台试验应合理考虑土与结构的相互作用。

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  • 来源
    《Soil Dynamics and Earthquake Engineering》 |2011年第12期|p.1690-1702|共13页
  • 作者

    Qiang Wang; Jin-Ting Wang; Feng Jin; Fu-Dong Chi; Chu-Han Zhang;

  • 作者单位

    State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 PR China Department of Science Technology and Environmental Protection China Huaneng Croup Beijing 100031 PR China;

    State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 PR China;

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