ABSTRACT
In another study, Riahi et al. (2009) were investigated the accuracy of the ETA in estimating average deformation demands of low and medium rise steel frames using f-series of ETAFs. In their study an elastic-perfectly-plastic model and also a bilinear material model were considered. It was shown that, although the results of the ETA are not exactly consistent with the results of ground motions analysis, the ETA can clearly identify the structure with a better performance even in the case of structures with a relatively complicated nonlinear behavior. Hariri et al. (2011) were compared ETA and Incremental Dynamic Analysis (IDA) for various steel moment frames. They concluded that ETA is able to estimate general trend of IDA curves with acceptable accuracy and very low computational demands.
