This study aimed to understand the optimal characteristics of friction dampers considering sway-rocking (SR) motion in vibration control structures during earthquakes. The nonlinear seismic response was numerically obtained using a six-story reinforced-concrete building model with a friction damper and SR springs and damping elements. The results indicate that the SR case shows a less sensitive response change with increased damper sliding force and shows a higher optimal damper sliding force, compared with the fixed-base (FB) case. Moreover, a reversal phenomenon may occur in the response curve for the average peak story drift against the sliding force between the FB and SR cases. This response reversal phenomenon was further analyzed using experimental data from shake table testing using a specimen with a friction device supported by a SR mechanism. This study contributes to damper optimization and effective design for friction-damped structures considering soil-structure interactions.

本研究旨在了解考虑地震期间振动控制结构中的摇摆（SR）运动的摩擦阻尼器的最佳特性。非线性地震响应是使用带有摩擦阻尼器和 SR 弹簧和阻尼元件的六层钢筋混凝土建筑模型以数值方式获得的。结果表明，与固定基座 (FB) 情况相比，SR 情况随着阻尼器滑动力的增加显示出不太敏感的响应变化，并显示出更高的最佳阻尼器滑动力。此外，在 FB 和 SR 情况下平均峰值楼层漂移对滑动力的响应曲线中可能会出现反转现象。使用带有由 SR 机构支撑的摩擦装置的试样的振动台测试的实验数据进一步分析了这种响应反转现象。本研究有助于考虑土-结构相互作用的摩擦阻尼结构的阻尼器优化和有效设计。