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Seismic Response Spectrum

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I was given seismic design criteria for an overseas project that is not typical of what is used in the IBC code.  The design criteria given to me is:


Peak Horizontal Ground Acceleration:


0.17(g) - 10% over 10 years.

0.28(g) - 10% over 100 years.


I was wondering how this information can be utilized in an equivalent static force analysis.  IBC uses an acceleration response spectrum having a 2 percent probability of exceedance within a 50 year period.  Seems to me I’m mixing apples and oranges with this criterion.  My seismic texts don’t show a method for taking raw data like this and translating it into an equivalent static force system.  Is it possible?