Endurance time method for multi-component analysis of steel elastic moment frames

The endurance time (et) method is a time history-based dynamic analysis procedure whichuses special intensifying acceleration functions for evaluation of the seismic response of structures. one ofthe potential applications of the et method is in the three-dimensional analysis of buildings under multidirectionalexcitations. in this paper, considering horizontal components of excitation, an algorithm forthe multi-component analysis of building structures by the et method is proposed, and results of theet method for various steel moment frames with 1 to 7 stories are compared with results from timehistory analysis with real earthquakes. results show that based on recommendations of structural codesfor bi-directional time history analysis, which requires applying horizontal components of earthquakessimultaneously, the et method can be used to predict the seismic response of structures with appropriateapproximation.