INCORPORATION OF REAL-TIME RECURRENCE PROBABILITIES,SITE RESPONSE EFFECTS, AND RUPTURE DIRECTIVITY EFFECTSIN SITE-SPECIFIC RESPONSE SPECTRA, UTAH STATE CAPITOL,SALT LAKE CITY, UTAH

摘要

We performed probabilistic and deterministic seismic hazard analyses to develop site-specific horizontaland vertical response spectra for use in the seismic renovation program for the Utah State Capitol. Weconsidered a range of earthquake source parameters, recurrence data, and Poissonian, real-time, and faultslip rate models to characterize the potential occurrence of large earthquakes on the nearby Wasatch fault.Both firm soil and soft rock attenuation relationships were used in the analysis. The rock results weremodified for the firm soil site conditions using region-specific soil amplification factors. Near-fieldeffects were incorporated from consideration of alternative rupture geometries.