The purpose of this paper is to use probabilistic methods to evaluate the seismic reliability of steel building. This study includes: (1) modelling of earthquake ground motions; (2) structural response analysis in the inelastic range, (3) risk analysis of limit states in terms of the probability of exceedance of story drift ratio. Two 8-story steel buildings are designed according to the Taiwan Building Code. DRAIN-2D program is used for response analysis of the structure for a wide range of ground acceleration which represent realization of ground motion in the future. Risk analysis is carried out to determine the probability of maximum story drift of the structure. The results provide a basis for comparison between the reliability of Taiwan code with those of other countries can be made.
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