GENERATION AND APPLICATION OF THE UNIFORM HAZARD SPECTRUM AND THE CONDITIONAL MEAN SPECTRUM BASED ON GROUND MOTION SIMULATION

A method is proposed to generate the uniform hazard spectrum (UHS) and the conditional mean spectrum (CMS) based on ground motion simulation. This method adopts the hybrid source model including the AB95_BC point source model and the stochastic finite fault model to generate artificial ground motions. Then the response spectra of the artificial ground motions are used for statistics and the UHS and the CMS are developed for the concerned region. To illustrate the presented method, the region in terms of Memphis TN in US is selected as the concerned region, and the possible ground motions occurring in 1000 years are simulated. Then the UHS with the exceedance probability of 2% in 50 years and the corresponding CMS were generated. Finally, some ground motion records are selected based on the generated CMS in combination with the greedy optimization algorithm with the consideration of different scaling methods and different matching targets: the mean and the standard deviation.