This paper evaluates seismic performance of a three-span high-speed railway (HSR) simply supported bridge-track system equipped with multi-joints rotational friction damper (MRFD) using pseudodynamic hybrid simulation. In hybrid simulation, a simplified nonlinear model based on the reference of high-speed railway model is used as a numerical substructure. The experimental substructure is a rotational friction damper (RFD) specimen consisting of two rotational joints. The feedback-force of the RFD specimen is multiplied in different multiples to consider the different clamping force of MRFD with more rotational joints. Results of cyclic tests indicate that the RFD specimen has a good ability to mitigate seismic damage of bridge-track system. Then, pseudodynamic hybrid simulations were performed in the longitudinal direction of the bridge to examine the seismic performance of MRFD. The effect of various ground motions and the influence of different clamping forces of MRFD were investigated. Test results confirmed the applicability of MRFD in HSR bridge-track system.

中文翻译：

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具有旋转摩擦阻尼器的高速铁路桥轨系统拟动力混合仿真

本文使用拟动力混合仿真评估了配备多关节旋转摩擦阻尼器 (MRFD) 的三跨高速铁路 (HSR) 简支桥轨系统的抗震性能。在混合仿真中，以高速铁路模型为参考的简化非线性模型作为数值子结构。实验子结构是一个由两个旋转接头组成的旋转摩擦阻尼器 (RFD) 试样。RFD试样的反馈力以不同的倍数相乘以考虑具有更多旋转接头的MRFD的不同夹持力。循环试验结果表明，RFD试件具有良好的减轻桥轨系统地震破坏的能力。然后，在桥梁的纵向方向上进行了伪动力混合模拟，以检查 MRFD 的抗震性能。研究了各种地震动的影响以及MRFD不同夹持力的影响。测试结果证实了MRFD在高铁桥轨系统中的适用性。