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王国波, 王垚, 禹海涛, 郑年文, 孙富学. 考虑基础提离的摇摆框架结构地震响应振动台试验研究[J]. 岩土工程学报, 2021, 43(11): 2064-2074. DOI: 10.11779/CJGE202111013
引用本文: 王国波, 王垚, 禹海涛, 郑年文, 孙富学. 考虑基础提离的摇摆框架结构地震响应振动台试验研究[J]. 岩土工程学报, 2021, 43(11): 2064-2074. DOI: 10.11779/CJGE202111013
WANG Guo-bo, WANG Yao, YU Hai-tao, ZHENG Nian-wen, SUN Fu-xue. Shaking table tests on seismic response of rocking frame structure considering foundation uplift[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(11): 2064-2074. DOI: 10.11779/CJGE202111013
Citation: WANG Guo-bo, WANG Yao, YU Hai-tao, ZHENG Nian-wen, SUN Fu-xue. Shaking table tests on seismic response of rocking frame structure considering foundation uplift[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(11): 2064-2074. DOI: 10.11779/CJGE202111013

考虑基础提离的摇摆框架结构地震响应振动台试验研究

Shaking table tests on seismic response of rocking frame structure considering foundation uplift

  • 摘要: 结构基础与地基土发生分离即基础提离的现象在强震时是不可避免的,为此摇摆隔震(Rocking Isolation)的理念逐渐提出。基于此设计了常规基础框架结构模型和摇摆框架结构模型,基于振动台试验数据对比分析了两类结构对场地土以及自身地震响应的影响。结果表明:①由于结构基础发生的提离量及提离范围有限,提离效应对结构频谱特性影响不显著,主要影响结构竖向加速度响应幅值;②地震波类型对结构提离效应影响显著,脉冲型地震波引起的提离量最大,但提离次数最少;③相比较于常规框架结构,摇摆框架结构对场地土地震响应的影响更显著,且其自身响应的高频成分较为丰富。研究成果对探讨摇摆结构地震响应规律有一定的参考意义。

     

    Abstract: The separation of structural foundation and foundation soil, namely the foundation uplift, is inevitable in strong earthquakes, so the concept of rocking isolation is gradually proposed. Based on this idea, two types of models for frame structure are designed: the conventional foundation frame structure and the rocking frame structure. The influence effects of the two types of structures on the site soil and their own seismic responses are compared and analyzed based on the shaking table test data. The test results show that: (1) Due to the limited uplift amount and range of the structural foundation, the uplift effect has no significant influences on the spectral characteristics of the structure, but mainly affects the vertical acceleration response amplitude. (2) The seismic wave type has a significant influence on foundation uplift effect. The impulse seismic wave causes the largest uplift, but the least numbers. (3) Compared with that of the conventional frame structure, the influence of rocking frame structure on the site soil seismic response is more significant, and the high frequency components of its own response are more abundant. The research results have certain reference significance for exploring the seismic response law of rocking structure.

     

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