The gravity cooling water tank is a remarkable structural feature of third-generation pressurized water reactor nuclear power plant. To investigate the influence of fluid-structure interaction (FSI) on the seismic response of the structure, this study designed two 1 : 50 simplified models of the AP1000 shield building. A series of shaking table tests were conducted to study the seismic responses with and without FSI effect. The natural frequency, acceleration, strain, and hydrodynamic pressure of the two models were analyzed, and the seismic reduction effect of the water tank was evaluated. Moreover, the test data were compared with the results of numerical analysis using the ABAQUS software. The results show that the presence of water and the sloshing of water reduce the natural frequency and seismic response of the model structure. Thus, the gravity cooling water tank has a certain seismic reduction effect. The simplified model of water sloshing can be used to analyze the seismic response of the shield building.

中文翻译：

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考虑流固耦合的AP1000盾构建筑的实验和数值研究

重力冷却水箱是第三代压水堆核电站的显着结构特征。为了研究流固耦合（FSI）对结构地震响应的影响，本研究设计了两个 1:50 的 AP1000 盾构建筑的简化模型。进行了一系列振动台试验来研究有和没有 FSI 效应的地震响应。分析了两种模型的固有频率、加速度、应变和水动力压力，并对水箱的减震效果进行了评价。此外，将测试数据与使用 ABAQUS 软件的数值分析结果进行了比较。结果表明，水的存在和水的晃动降低了模型结构的固有频率和地震响应。因此，重力冷却水箱有一定的减震作用。水晃动简化模型可用于分析盾构建筑物的地震响应。