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现有的空冷支架结构抗震设计方法没有明确考虑设备在地震中的使用安全性,不符合“投资效益”准则。通过空冷支架结构的抗震性能试验研究,给出适合该类结构-设备耦合体系在地震作用下的性能水平,提出考虑设备使用安全性的空冷支架结构抗震性能目标量化值,并建立一种适用于该类结构体系的基于位移的抗震设计方法和步骤。最后,以某1 000 MW空冷支架结构为例进行基于位移的抗震设计,并采用非线性动力时程分析对提出的基于位移的设计方法进行验证。结果表明,提出的基于位移的抗震设计方法较为合理。
The existing methods of aseismic design of air-cooled scaffolding do not explicitly consider the safety of equipment used in earthquakes and do not meet the criteria of “investment benefit”. Based on the experimental study of the seismic performance of the air-cooled scaffolding structure, the performance level of this kind of structure-equipment coupling system under earthquake action is given, and the quantification of the seismic performance of the air-cooled scaffold structure considering the safety of equipment is proposed. Displacement-based seismic design methods and procedures for such structural systems. Finally, the seismic displacement design based on a 1 000 MW air-cooled scaffolding structure is taken as an example. The proposed displacement-based design method is verified by nonlinear dynamic time history analysis. The results show that the proposed displacement-based seismic design method is more reasonable.