Abstract: Systems, methods and apparatuses for analyzing the non-linear effects of a seismic load on a structure are disclosed. A system includes software instructions for enabling a computer to provide a site model, provide a structure model, and provide a site-structure interface model; receive one or more parameters associated with at least one of the site model, the structure model, and the site-structure interface model; generate a combined model based at least in part on the site model, structure model, site-structure interface model and the one or more parameters; and generate a response associated with the combined model based on an external load.