Ground Motions for Earthquake Simulator Qualification of Electrical Substation Equipment

Abstract

Thirty five three-component ground motions recorded in 18 earthquakes were analyzed and the records were cross-compared based on several parameters. The “best candidate” for the input motion was selected and modified by time-domain spectral matching procedure. The resulting strong motion time history preserves the nonstationary behavior of the real earthquake record while its response spectra envelope the IEEE target response spectra in a broad range of natural frequencies as required by the standard. The resulting strong motion time history is intended for use for equipment qualification testing, and will be considered for inclusion in a future revision to IEEE 693. Additional requirements for the input motion specification and generation procedure in the IEEE 693-1997 are recommended.