Two methods, nonlinear static procedure （Push-over analysis） and nonlinear dynamic procedure, are used to analyze the ultimate plastic damage and the performance-point plastic damage of a 6-floor based-isolated-steel frame under severe earthquake action, based on process tracking. The story drift, the displacement of isolated floor, and the top-point displacement of structure are analyzed. The results reveal that push-over analysis can be considered as an effective and simple appraisal method about isolated structure under earthquake action. The mean analysis, which is gotten from nonlinear dynamic procedure, such as the story drift, matches those from Push-over analysis to some extent.%以一榀具有集中塑性铰单元模型的基础隔震钢框架为模型,分别采用静力弹塑性分析方法（Push-over）和直接积分的动力弹塑性时程的方法,基于过程追踪,计算了隔震框架各损伤模式首次出现时的层间位移、隔震层位移及框架顶点位移,对比研究了基础隔震结构在地震作用下的损伤.结果表明：Push-over静力弹塑性分析方法可以作为基础隔震结构在地震作用下的结构损伤分析的简化方法;对应于性能点位移的结构动力弹塑性所分析的层间位移等均值结果与静力弹塑性分析结果具有一定的符合程度.
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