Seismic Performance Parameter Analysis of Prefabricated Segmental Hybrid-Connected Double-Column Piers

Due to the unclear seismic mechanism of prefabricated segmental assembled piers and the lack of earthquake damage data, their application in areas prone to strong earthquakes is limited. This study establishes a 3D model of prefabricated segmental hybrid-connected double-column piers using the ABAQUS finite element analysis software to investigate their seismic performance. The study focuses on the influence of prestressing tendon cross-sectional area and prestress magnitude on the structural performance. The results show that increasing the cross-sectional area of prestressing tendons enhances the load-bearing capacity and energy dissipation of the piers while reducing residual displacement after an earthquake. However, its impact on stiffness degradation is relatively limited. Moreover, increasing prestress appropriately not only improves load-bearing capacity and energy dissipation but also effectively reduces residual displacement. Nevertheless, excessive prestress may reduce the ductility factor of the structure, limiting its plastic deformation capacity. The experimental results indicate that rational control of prestress and tendon cross-sectional area is critical for optimizing the seismic design of double-column piers. This research provides theoretical support and design guidance for the practical application of prestressed segmental assembled double-column piers in engineering projects.