the use of improved risk targeting approach in seismic hazard assessment of makran region

In this paper, seismic risk in subduction zones is taken into account in a new way compared to probabilistic seismic hazard analysis (psha). as a new approach, seismic design maps that define risk-targeted ground motions (rtgm) such that buildings designed according to these maps will have explicit quantification of the limit-state (ls) objective, are developed. as used in (asce, 2017), 1% probability of exceedance (poe) of collapse-ls in 50 years is brought. these maps are developed using by iterative risk calculation, wherein a generic building collapse fragility curve is convolvedwith hazard curve until target risk criteria are satisfied under the framework of performance-based earthquake engineering (pbee) (luco et al., 2007). the paper also explores the difficulties in implementing risk-targeting (rt) approach. it is shown that this current approach may be incorrect at locations where the tectonic environment is much different than thatused to develop the hazard curve with the limited number of return periods (rp) using the psha.