TY - JOUR ID - 2376 TI - Application of damage spectra as seismic intensity measures in endurance time method for steel moment-resisting frames JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Maleki-Amin, M.J. AU - E. Estekanchi, H. AD - Department of Civil Engineering, Sharif University of Technology (SUT), Tehran, P.O. Box 11155-9313, Iran Y1 - 2017 PY - 2017 VL - 24 IS - 1 SP - 53 EP - 64 KW - damage spectra KW - Endurance Time method KW - steel moment frame KW - damage indices KW - seismic resistant design DO - 10.24200/sci.2017.2376 N2 - In seismic resistant design of moment frames, the structure behavior under earthquakes has to be examined, considering various damage criteria. Damage indices can be estimated by using endurance time (ET) method with minimum computational effort. The quality of this estimation can be improved in different ways. In this paper, the graphs of a certain damage index versus natural period of the structure, called damage spectra, are produced applying intensifying ET records and scaled ground motions (GM). Then the excitation duration of ET acceleration functions (target time) is modified in order to reach acceptable consistency between ET and GM damage spectra. Moreover, various damage indices of a steel moment frame at two hazard levels are evaluated via nonlinear time-history analyses of the structure under scaled earthquakes and ET records. It is observed that the frame damage estimation can be improved by modifying the target time of ET records based on damage spectra; in addition, in most cases, there are negligible discrepancies between values of frame damage indices corresponding to ground motions and ET acceleration functions with the damage-based target time. UR - https://scientiairanica.sharif.edu/article_2376.html L1 - https://scientiairanica.sharif.edu/article_2376_351534b5154c45d8757c9fb7e644e220.pdf ER -