Multicomponent Endurance Time Analysis
Homayoon Esmailpur Estekanchi, Hassan A. Vafai · 2021
In this chapter, the extension of Endurance Time analysis to multicomponent response history analysis is explained. The Endurance Time method can be readily extended to multicomponent seismic analysis. Various methods and approaches can be adopted for extending ET analysis to two and three component analyses. Some of these ideas are presented in this chapter. The ET method is evaluated by comparing results of the ET analysis with results of time-history analysis using horizontal components of a set of ground motions applied according to seismic analysis regulations such as the Iranian National Building Code (INBC) and ASCE 7-05. A brief review of basic code regulations on the three-dimensional analysis of buildings is presented. Various building frame structures, which are designed according to the INBC code, are analyzed by both ET and conventional time-history analysis using ground motions. A procedure for code compliant ET analysis is proposed for simultaneous excitation in perpendicular directions of structures. Even though nonlinear two-dimensional analysis results using currently available ET records indicate that reasonable estimates can also be obtained in a nonlinear range, this chapter focuses on linear response history analysis, and nonlinear multicomponent ET analysis is not covered.