study of the seismic vulnerability of steel moment-resisting frames designed based on the tenth code of the iranian national building regulations using fragility curves

development of new methods in seismic analysis and increasing application of performance based seismic design necessitate the study of the seismic performance of structures designed based on iranian regulations. in this study the seismic performance of steel moment-resisting frames designed based on the tenth code of the iranian national building regulations is investigated. frames are different in number of stories, seismic loads, span length and gravity loads. fragility curves of the frames are depicted for different performance objectives and their seismic vulnerabilities are examined. results indicates that satisfying life safety performance level would ensure the proper performance of frames for other performance levels and also the performance of taller frames is more critical than shorter frames.