下部减震层间隔震结构振动台试验研究

层间隔震体系是基础隔震体系的发展与延伸，作为一种复杂结构体系，以往的研究仅限于探讨隔震层参数对地震响应及减震效果的影响，本文首次进行了下部结构附加黏滞阻尼器的层间隔震结构振动台试验研究。设计了1个四层的钢框架模型，首先进行了基础固接及1层顶隔震的振动台试验研究，其次，在1层顶隔震的基础上，在下部结构附加了黏滞阻尼器进行下部减震层间隔震结构的振动台试验研究，测定结构的加速度、层间位移及层剪力系数。试验结果表明，下部减震是在层间隔震基础上进一步提高隔震减震效果，降低结构地震响应行之有效的策略。本文还建立了层间隔震结构的有限元模型，将有限元分析结果与试验结果进行了对比。

Shaking table tests for a mid-story isolation structure with shock absorbers

Mid-story isolation structure is a deverlopment and extension of base isolation structures.Previous studied focused on the effect of parameters of isolation layer on earthquake response and seismic reduction effectiveness.Here,shaking table tests for a mid-story isolation structure with shock absorbers on substructure were conducted.For a four-story steel frame model,the cases of its base fixed and its first story top isolated were firstly tested;secondly,viscous dampers were added on substructure and a shaking table test was done.Acceleration,story displacement and story shear force coefficient were measured respectively.It was shown that based on the case of the top of the first story isolated,adding shock absorbers on substructure can improve seismic reduction effectiveness.The finite element model of a mid-story isolation system was established,and the comparison between the finite element analysis results and test ones was conducted.