comparison of alternative methods for incremental dynamic analysis

the conventional incremental dynamic analysis (ida) -a parametric method- is a collection of time history analyses under ground motion records which is scaled to different intensity levels. this range is selected so that can cover all structural behavior. finally, the results are illustrated in one or more diagrams known as ida curves. based on recent studies, a few alternative methods to gain the ida curves have been proposed. in this essay, the proposed methods are discussed and compared. then the comparison and advantageous of different methods are discussed for a moment-resisting frame (mrf) under a certain earthquake record.