Coupling beams are used in double-column high-pier bridges to improve the integrity of the two piers. The stiffness of coupling beams has a significant effect on the seismic performance of double-column piers. The seismic behavior of a double-column pier with triple-coupled beams was investigated by cyclic loading test. The failure mode and cyclic response, as well as the shear deformation of a double-column bridge pier, were analyzed to investigate its seismic behavior. The test results, especially after a drift ratio of 1/83, indicated the presence of non-uniform damage characteristics between the coupling beams. Finite element models were developed and parametric analysis was carried out after validation. The focus was on the effects of the variable stiffness of the coupling beam along its height. By analyzing the bearing capacity, ductility, and damage of the double-column piers, the upper flexible and lower rigid coupling beam is a more reasonable arrangement principle. The research results can provide a reference for the innovation design ideas of similar bridge piers.

双柱高墩桥采用连梁，以提高两桥墩的整体性。连梁刚度对双柱桥墩的抗震性能影响显着。通过循环加载试验研究了三连梁双柱墩的抗震性能。对双柱桥墩的破坏模式、循环响应以及剪切变形进行了分析，以研究其抗震性能。测试结果，特别是在漂移比为 1/83 后，表明连梁之间存在不均匀的损伤特征。开发了有限元模型，并在验证后进行了参数分析。重点是连梁沿其高度的可变刚度的影响。通过对双柱桥墩的承载力、延性及损伤情况分析，上柔下刚性连梁是较为合理的布置原则。研究成果可为同类桥墩的创新设计思路提供参考。