In this study, sacrificial components were incorporated into self-centering railway bridge piers to improve the lateral stiffness. The seismic response of this new detail was investigated. First, the method to compute the initial uplift moment of the self-centering pier is given. In addition, shaking table tests were conducted on a free-rocking pier without sacrificial components, which was used to validate a two-spring numerical model. Good agreement was obtained between the numerical results and experimental data. Furthermore, the validated model was employed to investigate the influence of sacrificial components on the seismic response of rocking piers. For this purpose, two models were developed, with and without sacrificial components. Nonlinear response history analysis was then performed on both models under three historical motions. The results showed that compared to the one without sacrificial components, the rocking pier with sacrificial components has comparable displacement at the top of the pier, and maximum uplift moment at high amplitude motion. Therefore, incorporating sacrificial components into the rocking pier can increase the lateral stiffness at service load and low amplitude frequent earthquakes but can produce comparable response at high seismic excitation. These results provide support for performance-based seismic design of self-centering rocking piers.

在这项研究中，牺牲组件被合并到自定心的铁路桥墩中以提高侧向刚度。研究了这个新细节的地震响应。首先，给出了计算自定心墩的初始抬升力矩的方法。此外，在没有牺牲部件的自由摇摆码头上进行了振动台试验，该试验用于验证两弹簧数值模型。数值结果与实验数据吻合良好。此外，使用验证的模型来研究牺牲成分对摇摆墩的地震响应的影响。为此，开发了两个模型，带有和不带有牺牲组件。然后在三个历史运动下对两个模型进行了非线性响应历史分析。结果表明，与没有牺牲成分的岩壁相比，具有牺牲成分的岩壁墩在其顶部具有相称的位移，并且在高振幅运动下具有最大的上升力矩。因此，将牺牲性构件结合到摇摆墩中可以增加工作载荷和低振幅频繁地震时的侧向刚度，但在高地震激励下可以产生可比的响应。这些结果为自定心摇摆墩基于性能的抗震设计提供了支持。将牺牲性构件合并到摇摆墩中可以增加工作载荷和低振幅频繁地震时的侧向刚度，但在高地震激励下可以产生可比的响应。这些结果为自定心摇摆墩基于性能的抗震设计提供了支持。将牺牲性构件合并到摇摆墩中可以增加工作载荷和低振幅频繁地震时的侧向刚度，但在高地震激励下可以产生可比的响应。这些结果为自定心摇摆墩基于性能的抗震设计提供了支持。