This paper presents the numerical investigation of the seismic performance of post-tensioned self-centering precast concrete (SCPC) frames with variable friction dampers (VFDs) and hidden corbels (HCs). The VFDs are characterized by the combination of flat and grooved plates, where the friction forces change as the connection deformation increases, which enables designs to meet target seismic performance objectives at different seismic hazard levels. Theoretical and numerical models for the connection are proposed based on connection geometry, and a performance-based seismic design approach for the SCPC frames is outlined to meet target performance objectives at two common seismic hazard levels, the design basis earthquake (DBE) and the maximum considered earthquake (MCE). SCPC frames for a six-story prototype building located in a high seismic zone in California were designed using this procedure. Three frames with HC-VFD-SPSC connections were designed using various methods to mitigate concentration of drifts in the first story, and one frame was designed with conventional constant friction devices (CFDs) for comparison. Nonlinear time-history analyses were performed for these different designs using two sets of ground motions representing the DBE and MCE seismic hazard levels. The analysis results indicate that the frames with the HC-VFD-SCPC connections achieved the target performance objectives. The proposed approaches of modifying post-tensioning and VFD design parameters or column stiffness in the first story were effective in mitigating the concentration of drifts. Additionally, through comparison with the results of the frame with CFDs, it was found that the VFDs are effective in decreasing overall drift demands at the MCE level, as well as mitigating detrimental higher mode effects observed in SCPC frames with CFDs.

本文介绍了具有可变摩擦阻尼器 (VFD) 和隐藏式牛腿 (HC) 的后张自定心预制混凝土 (SCPC) 框架的抗震性能的数值研究。VFD 的特点是平板和凹槽板的组合，其中摩擦力随着连接变形的增加而变化，这使得设计能够满足不同地震危险级别的目标抗震性能目标。基于连接几何结构提出了连接的理论和数值模型，并概述了 SCPC 框架的基于性能的抗震设计方法，以满足两个常见地震危险级别，设计基准地震 (DBE) 和最大地震危险级别的目标性能目标。考虑地震（MCE）。位于加利福尼亚高地震带的六层原型建筑的 SCPC 框架是使用此程序设计的。使用各种方法设计了三个带有 HC-VFD-SPSC 连接的框架，以减轻第一层中漂移的集中，一个框架使用传统的恒定摩擦装置 (CFD) 进行设计以进行比较。使用代表 DBE 和 MCE 地震危险级别的两组地面运动，对这些不同的设计进行了非线性时程分析。分析结果表明，带有 HC-VFD-SCPC 连接的框架达到了目标性能目标。在第一层中修改后张和 VFD 设计参数或柱刚度的建议方法在减轻漂移集中方面是有效的。此外，