RELIABILITY-BASED DETERMINATION OF DESIGN EARTHQUAKE GROUND MOTIONS FOR PERFORMANCE-BASED SEISMIC ENGINEERING

Performance-based seismic design of structures has been widely recognized as useful design concept, in which required performance such as safety, serviceability and others are explicitly described, and the required level of the performance are quantitatively specified. The required level has often been expressed in terms of return periods of earthquake ground motion intensities such as PGA or spectral acceleration, all of which do not fully represent ground motion time histories. Recent advancements on theoretical as well as semi-empirical fault models in engineering seismology should be incorporated to meet the required performance levels of structures. Therefore, this paper proposes a new reliability- based methodology for determination of source parameters of the fault model which correspond to the return period specified by design requirement.