Disaggregation of Seismic Hazard According to Chinese PSHA Method

Abstract eng:
Probabilistic seismic hazard analysis (PSHA) combines all the possible earthquakes affecting the site, but lost the concept of “real earthquake”. In China, the PSHA is modified to Probabilistic Seismic Hazard Analysis method considering spatially and temporally inhomogeneous seismic activity, but the concept of “real earthquake” is still ignored. To resolve this problem, disaggregation of seismic hazard according to Chinese PSHA method and determination of control earthquake & design earthquake are studied in this article. Finally, the tow principles are established, they are: (1) each design earthquake must have explicit seismogenic structure; and (2) design earthquake spectrum should be equal to the disaggregation target value.

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