Generating Code-Compatible Floor Response Spectra for Nuclear Power Plants

In the present study, an effective analysis framework is developed for generating the floor response spectra (FRS) of nuclear power plants based on the explicit time-domain method (ETDM), an efficient approach recently proposed for nonstationary random vibration analysis of large-scale complex structures. The FRS obtained by the present approach are fully consistent with the code-specified ground response spectra (GRS), and the problems encountered in the traditional time-history method and direct spectra-to-spectra method can be completely avoided. The FRS of a real nuclear power plant are generated to demonstrate the feasibility of the proposed method to engineering practice.