This paper presents a new three‐directional isolator and a new prediction model for base isolation method of buildings to improve the comfort of occupants under subway‐induced environmental vibration. The mechanical properties of the isolator were tested in a laboratory. The results indicated that the stiffness values can satisfy the isolation requirements for environmental vibrations by increasing the thickness of rubber layers, and the sliding bottom is beneficial for protecting the new isolator from instability failures under earthquakes. The suppression effectiveness of the new isolator for three‐directional subway‐induced environmental vibrations was then investigated via field experiments with a full‐scale building. Further, the tri‐axial comfort of occupants inside the building is enhanced significantly. Finally, using the measured data from the field experiments as an input, the new prediction model was proven to be effective for evaluating the vertical vibration levels of the base‐isolated building. As the new prediction model only includes a few of the most influential floor slabs, the modeling workload and computational cost of the prediction analysis are eased. Therefore, the new isolator and the prediction model are beneficial for improving the service performances of the base isolation method, especially for the buildings near subway transportation and in seismic areas.

中文翻译：

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地铁引起的环境振动的建筑物基础隔离：现场试验和半分析预测模型

本文提出了一种新的三向隔离器和一种新的建筑物基础隔离方法的预测模型，以提高地铁在环境振动下居住者的舒适度。隔离器的机械性能在实验室中进行了测试。结果表明，通过增加橡胶层的厚度，刚度值可以满足环境振动的隔离要求，滑动底部有利于保护新型隔离器免受地震作用下的失稳破坏。然后，通过对一栋大型建筑物进行现场试验，研究了新型隔振器对地铁三向环境振动的抑制效果。此外，建筑物内部居住者的三轴舒适性得到了显着提高。最后，使用现场实验的测量数据作为输入，新的预测模型被证明可有效地评估基础隔离建筑物的垂直振动水平。由于新的预测模型仅包含一些最具影响力的楼板，因此减轻了预测分析的建模工作量和计算成本。因此，新的隔离器和预测模型有利于提高基础隔离方法的服务性能，特别是对于地铁附近和地震地区的建筑物。减轻了预测分析的建模工作量和计算成本。因此，新的隔离器和预测模型有利于提高基础隔离方法的服务性能，特别是对于地铁附近和地震地区的建筑物。减轻了预测分析的建模工作量和计算成本。因此，新的隔离器和预测模型有利于提高基础隔离方法的服务性能，特别是对于地铁附近和地震地区的建筑物。