In this paper, the seismic behaviors of precast bridge columns connected with grouted corrugated-metal duct (GCMD) were investigated through the biaxial quasi-static experiment and numerical simulation. With a geometric scale ratio of 1:5, five specimens were fabricated, including four precast bridge columns connected with GCMD and one cast-in-place (CIP) bridge column. A finite element analysis model was also established by using OpenSees and was then calibrated by using the experimental results for parameter analysis. The results show the biaxial seismic performance of the precast bridge columns connected with GCMD was similar to the CIP bridge columns regarding ultimate bearing capacity and hysteresis energy, and further, that it could meet the design goal of equivalent performance. The seismic performance of the precast bridge columns connected with GCMD deteriorated more significantly under bi-directional load than under uni-directional load. A proper slenderness ratio (e.g., 7.0–10.0) and longitudinal reinforcement ratio could significantly improve the energy dissipation capacity and deformation capacity of the precast bridge columns, while the axial load ratio and concrete strength had little influence on the above properties. The research results could bring insights to the development of the seismic design of precast bridge columns connected with GCMD.

本文通过双轴准静态试验和数值模拟研究了与灌浆金属波纹管（GCMD）连接的预制桥柱的抗震性能。以 1:5 的几何比例尺制作了 5 个试件，包括 4 个与 GCMD 连接的预制桥柱和 1 个现浇 (CIP) 桥柱。还利用OpenSees建立了有限元分析模型，然后利用实验结果进行参数分析进行标定。结果表明，GCMD连接的预制桥柱的双轴抗震性能在极限承载力和滞回能方面与CIP桥柱相似，并且能够满足等效性能的设计目标。与GCMD连接的预制桥柱在双向荷载作用下的抗震性能比在单向荷载作用下恶化更显着。适当的长细比（如7.0~10.0）和纵向配筋率可以显着提高预制桥柱的耗能能力和变形能力，而轴荷比和混凝土强度对上述性能影响不大。研究结果可为GCMD连接的预制桥柱抗震设计的发展带来启示。0)和纵向配筋率可显着提高预制桥柱的耗能能力和变形能力，而轴荷比和混凝土强度对上述性能影响不大。研究结果可为GCMD连接的预制桥柱抗震设计的发展带来启示。0)和纵向配筋率可显着提高预制桥柱的耗能能力和变形能力，而轴荷比和混凝土强度对上述性能影响不大。研究结果可为GCMD连接的预制桥柱抗震设计的发展带来启示。