目前基于性能的抗震评估主要考虑结构的最大位移反应,而忽略了滞回耗能对其造成的影响,不能全面反应地震损伤的根本机理。该文基于非线性振动理论,结合地震波的关键性特征参数,得到计算SDOFS滞回耗能的解析方法。在此基础上,根据MDOFS结构与等效SDOFS结构之间最大变形和滞回耗能的近似转换关系,采用Park-Ang模型对结构整体抗震性能作出合理评估。该方法能反应地震损伤的根本机理,且精度较高,具有广泛的工程应用前景。 At present, the performance-based seismic evaluation mainly considers the maximum displacement response of the structure, ignoring the impact of hysteresis on its energy consumption, and can not fully reflect the fundamental mechanism of earthquake damage. Based on the nonlinear vibration theory and the key characteristic parameters of seismic waves, an analytical method for calculating hysteresis energy of SDOFS is obtained. Based on this, Park-Ang model is used to evaluate the overall seismic performance of the structure based on the approximate transformation between the maximum deformation and the hysteresis energy dissipation between the MDOFS structure and the equivalent SDOFS structure. The method can reflect the fundamental mechanism of earthquake damage and has high accuracy and wide application prospects in engineering.