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Evaluation of the EDR performance in seismic control of steel structures using endurance time method
, Article Scientia Iranica ; Volume 23, Issue 3 , 2016 , Pages 827-841 ; 10263098 (ISSN) ; Estekanchi, H. E ; Sharif University of Technology
Sharif University of Technology
Abstract
The Energy Dissipating Restraint (EDR) is a friction device which can be used to dissipate the energy introduced to a structure by a seismic event. In this paper, the performance of the structures which are equipped with the EDR is investigated in several intensity levels by using a novel seismic analysis method, namely the Endurance Time (ET) method. By reasonably estimating the response of structures over the entire range of the desired intensity levels through each time-history analysis, this method can effectively reduce the computational cost, offering an appropriate procedure for performance-based design of structures. The EDR performance in the seismic control of steel frames is...
Application of rigid-perfectly plastic spectra in improved seismic response assessment by endurance time method
, Article Engineering Structures ; Volume 111 , 2016 , Pages 24-35 ; 01410296 (ISSN) ; Estekanchi, H. E ; Sharif University of Technology
Elsevier Ltd
Abstract
The Endurance Time (ET) method is a dynamic analysis procedure in which structures are subjected to predesigned accelerograms that increase their intensity in time. The main advantage of the ET method over the standard time-history analysis, which uses ground motions as excitation, is its reduced computational effort. In this paper, the nonlinear rigid-perfectly plastic (RPP) spectra, instead of linear elastic spectra, are used to correlate the seismic hazard return period and the time in the ET analysis. Several elastic-perfectly plastic SDOF systems as well as two three-story steel frames-namely a moment-resisting frame and a frame equipped with friction dampers-are analyzed. The response...