Laminated rubber bearings have a large compression stiffness and small tension stiffness and isolation layers show rocking deformation under bending moments. The application of isolation technology is limited in high-rise structures due to the unequal compression and tension stiffnesses. The rocking effect of a high-rise isolated structure was investigated in this work. To do this, a dynamic model of a high-rise isolated structure considering non-linear tension behaviour of the isolator and the stiffness centre offset was established. The limit criterion of the rocking angle and the corresponding input peak ground acceleration of the tension limit, damage limit and collapse limit were determined. A shaking table test of the isolated model was conducted and the aspect ratio was found to have a great influence on the structural rocking response. The response of the large aspect ratio (LAR) model was larger than that of a model with a small aspect ratio. The bearings in the LAR model were more likely to be tensioned. The test results and numerical simulations were close, confirming the accuracy of the proposed dynamic model and the limit criteria. Subsequently, dynamic analysis of frame–shear wall structures was conducted and the influence of aspect ratio and earthquake level was investigated. The proposed theories can be applied for direct predictions of rocking response and the performance state of isolators.

中文翻译：

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高层隔震结构振动台试验及摇摆效应研究

叠层橡胶支座具有较大的压缩刚度和较小的拉伸刚度，隔离层在弯矩作用下表现出摇摆变形。由于压缩和拉伸刚度不均等，隔震技术在高层结构中的应用受到限制。在这项工作中研究了高层隔离结构的摇摆效应。为此，建立了考虑隔振器非线性张力行为和刚度中心偏移的高层隔振结构动力学模型。确定了摇摆角的极限判据和相应的拉力极限、损伤极限和倒塌极限的输入峰值地面加速度。对孤立模型进行了振动台试验，发现纵横比对结构摇摆响应有很大影响。大纵横比 (LAR) 模型的响应大于小纵横比模型的响应。LAR 模型中的轴承更容易受拉。测试结果和数值模拟接近，证实了所提出的动力学模型和限制标准的准确性。随后，对框架-剪力墙结构进行了动力分析，研究了纵横比和地震级别的影响。所提出的理论可用于直接预测摇摆响应和隔振器的性能状态。确认提议的动态模型和限制标准的准确性。随后，对框架-剪力墙结构进行了动力分析，研究了纵横比和地震级别的影响。所提出的理论可用于直接预测摇摆响应和隔振器的性能状态。确认提议的动态模型和限制标准的准确性。随后，对框架-剪力墙结构进行了动力分析，研究了纵横比和地震级别的影响。所提出的理论可用于直接预测摇摆响应和隔振器的性能状态。