Spectral matching between the design spectrum and the response spectrum of a selected ground motion record is required in most codes. However, the period range for spectral matching varies among different codes provisions. For example:
ASCE7-05: (0.2T1) to (1.5T1)
Eurocode 8: (0.2T1) to (2T1)
where: T1 is the fundamental period of the structure.
So, how about for Japanese code requirement for spectral matching just like in ASCE7-05 and Eurocode mentioned above?