Nonlinear time-history analysis (NLTHA) owes much of the quality of its results to the selected record set. This article explains step by step how 11 earthquake records are chosen.
01 Target spectrum and compatibility
Records are selected and scaled to match the design target spectrum within a defined period range; the key principle is that the mean spectrum should not fall below the target.
02 Selection and scaling
The record pool is narrowed by considering fault mechanism, magnitude, and distance criteria; the set is then brought into alignment with the target through amplitude scaling.
