In equipment–structure systems, the soil–structure interaction and connection types between the equipment and structure significantly affect the seismic response. To understand this effect, in this study, the motion equation of an equipment–structure–soil system was derived, and energy balance equations for each part of the coupled system were obtained. Further, the effects of the soil on the energy response were analyzed based on the results of shaking table tests of an equipment–structure system and real‐time substructure shaking table tests of equipment–structure–soil systems with different connection types. The energy response of the equipment–structure system with a rigid ground was compared with that of the equipment–structure–soil systems. The analysis results showed that the energy response of the equipment–structure–soil system with different connections was quite different from that of the system with a rigid ground. The soil decreased the total energy input to the equipment and structure and significantly changed the time distribution characteristics of the input energy. Additionally, the soil weakened the energy consumption of the connections. Therefore, the influence of the soil should be considered in the design of equipment–structure systems with connections.

中文翻译：

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土壤对设备与结构之间不同连接类型的设备-结构系统的能量响应的影响

在设备-结构系统中，设备与结构之间的土壤-结构相互作用和连接类型会显着影响地震响应。为了理解这种影响，在本研究中，推导了设备-结构-土壤系统的运动方程，并获得了耦合系统各部分的能量平衡方程。此外，根据设备-结构系统的振动台测试结果和具有不同连接类型的设备-结构-土壤系统的实时子结构振动台测试结果，分析了土壤对能量响应的影响。将具有刚性地面的设备-结构系统的能量响应与设备-结构-土壤系统的能量响应进行了比较。分析结果表明，具有不同连接的设备-结构-土壤系统的能量响应与具有刚性地面的系统的能量响应有很大不同。土壤减少了输入到设备和结构的总能量，并显着改变了输入能量的时间分布特性。另外，土壤削弱了连接的能耗。因此，在设计带连接的设备-结构系统时应考虑土壤的影响。