© 2020 John Wiley & Sons, Ltd. Experimental research into the seismic performance of buildings with passive oil dampers has so far been restricted to large-scale testing of frames erected on laboratory shaking tables that ignore the foundation soil below. This simplification of the problem falls short of replicating dynamic soil-structure interaction that would occur in the field. This paper presents the first experimental attempt at utilising high gravity dynamic centrifuge testing to replicate the response of a damped building at a reduced model scale. The paper compares the dynamic response of two similar two-degree-of-freedom model sway frames, one control (bare) frame and one frame equipped with miniature oil dampers, both structures founded on shallow raft foundations in dry dense sand. The miniature oil dampers successfully mitigate floor accelerations, drifts, and storey shear forces in the damped frame with minor modification to the frame stiffness. For strong, near resonance motions, global rocking of the undamped frame associated with physical uplifting of the foundation from the soil surface and subsequent yielding of sand beneath has led to floor acceleration levels, which are comparable to those obtained in the damped building fitted with miniature oil dampers. Assessment of the instrumentation installed on the miniature oil dampers reveals a viscoelastic damper behaviour with a dependency on stroke magnitude and on velocity.

中文翻译：

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地震荷载作用下含油阻尼器结构的离心建模

© 2020 John Wiley & Sons, Ltd. 迄今为止，对带有被动油阻尼器的建筑物的抗震性能的实验研究仅限于对安装在实验室振动台上的框架进行的大规模测试，而忽略了下面的地基土壤。问题的这种简化未能复制现场发生的动态土壤-结构相互作用。本文介绍了首次尝试利用高重力动态离心机测试在缩小的模型比例下复制阻尼建筑物的响应。本文比较了两种相似的双自由度模型摇摆框架的动力响应，一种控制（裸）框架和一种装有微型油阻尼器的框架，这两种结构都建立在干密沙浅筏基础上。微型油阻尼器成功地减轻了阻尼框架中的地板加速度、漂移和楼层剪切力，并对框架刚度进行了微小的修改。对于强烈的、接近共振的运动，无阻尼框架的整体摇摆与地基从土壤表面物理抬升以及随后下面沙子的屈服相关联，导致地板加速度水平，这与安装微型结构的阻尼建筑物中获得的水平相当。油阻尼器。对安装在微型油阻尼器上的仪器的评估揭示了粘弹性阻尼器的行为，其依赖于冲程大小和速度。无阻尼框架的整体摇晃与地基从土壤表面物理抬升以及随后下面的沙子屈服相关，导致地板加速度水平，这与在装有微型油阻尼器的阻尼建筑物中获得的水平相当。对安装在微型油阻尼器上的仪器的评估揭示了粘弹性阻尼器的行为，其依赖于冲程大小和速度。无阻尼框架的整体摇晃与地基从土壤表面物理抬升以及随后下面的沙子屈服相关，导致地板加速度水平，这与在装有微型油阻尼器的阻尼建筑物中获得的水平相当。对安装在微型油阻尼器上的仪器的评估揭示了粘弹性阻尼器的行为，其依赖于冲程大小和速度。