Innovative computing environment for fast and accurate prediction of approximate IDA curves

Abstract

A web-based methodology for the prediction of approximate IDA curves, which was recently developed within ICE4RISK project, and demonstrated with the web application (http://ice4risk.slo-projekt.info/WIDA), is briefly summarized in this chapter and its applicability is presented by means of an example of a fourstorey wall-equivalent dual system. The proposed methodology consists of two independent processes. The result of the first process is a response database of the single-degree-of-freedom model, whereas the second process involves the prediction of approximate IDA curves from the response database by using n-dimensional linear interpolation. The web application utilizes a response database of IDA curves, which was calculated for thirty ground motion records and the discrete values of the six parameters, which describe the period, damping and the force-displacement relationship of a building’s pushover curve. The web application enables quadrilinear idealization of the pushover curve, including strength degradation. Structural collapse capacity can therefore also be estimated. Very good agreement between the computed and the approximated IDA curves was observed if the error is measured in terms of peak ground or spectral acceleration which caused selected limit state.