This paper investigates the effectiveness of a new hybrid passive control system on the seismic response of an existing steel cable-stayed bridge considering the pounding effect. The proposed hybrid passive control system comprises a seismic isolator and a metallic damper. The bridge is located in a high seismic zone and has suffered several damages including the earthquake-induced pounding damage during the 1988 earthquake. Thereby, the proposed hybrid passive control system was investigated for seismic retrofitting of the bridge to mitigate the seismic damages due to future earthquakes. The hybrid control system was placed at the bridge ends and the tower–deck connection. A detailed three-dimensional finite element model of the bridge was created and validated with the earlier experimental results. A comparative analysis was performed through a series of nonlinear dynamic time-history analyses on the bridge equipped with the proposed and other control systems. The results showed that the hybrid control system reduced the bridge’s longitudinal seismic displacement, mitigated the pounding of the bridge with abutments and improved the overall seismic performance of the bridge.

本文研究了一种新的混合被动控制系统在考虑冲击效应的情况下对现有钢斜拉桥的地震响应的有效性。所提出的混合被动控制系统包括一个地震隔离器和一个金属阻尼器。这座桥位于高地震带，遭受了多次破坏，包括 1988 年地震期间地震引起的撞击损坏。因此，研究了所提出的混合被动控制系统，用于桥梁的抗震改造，以减轻未来地震造成的地震破坏。混合控制系统放置在桥端和塔台连接处。创建了桥梁的详细三维有限元模型，并使用早期的实验结果进行了验证。通过一系列非线性动力时程分析，对配备了建议系统和其他控制系统的桥梁进行了比较分析。结果表明，混合控制系统减少了桥梁的纵向地震位移，减轻了桥台的冲击，提高了桥梁的整体抗震性能。