Seismic hazard analysis and rock ground motions for a site in dubai

The seismic design criteria for a new bridge in Dubai require that the bridge satisfies an operational performance for the 475-year return period earthquake, and life safety performance for the 2475-year return period earthquake. The site is located at Dubai Creek on the west coast of the United Arab Emirates at 25 12’ 47” latitude and 55 20’ 48” longitude. Ground motions for use in time history dynamic analysis of the structure were developed for the two seismic hazards on the basis of site specific seismic hazard analysis that considered all the seismic sources. The probabilistic seismic hazard analysis (PSHA) indicated that the peak ground acceleration for the 475-year return period earthquake is 0.17g and 0.33g for the 2475-year return period earthquake. This paper summarizes the PSHA and the development of the rock ground motions.