UNIFORM-HAZARD RESPONSE SPECTRA - AN ALTERNATIVE APPROACH

An alternative method is presented for generating uniform-hazard respo nse spectra making use of a seismic hazard curve expressing annual pro bability of exceedance as a function of Peak Ground Acceleration (PGA) , a set of normalized (PGA = 1g) mean response spectra, and a coeffici ent-of-variation function for the random normalized spectral values in terms of period T. The practice of using mean + 1sigma normalized res ponse spectra, scaled to specified PGA levels, is discussed and associ ated mean return periods are evaluated.