Previous studies have proven that CFST (concrete-filled steel tube) battened built-up columns (CFST-BBCs) exhibit good hysteresis energy dissipation capacity and deformation capacity under lateral cyclic repeated loading. To further understand the elastoplastic seismic response characteristics of such composite structures under strong earthquakes, two pseudo-dynamic tests of 1/8-scaled CFST-BBC pier specimens were first performed. The acceleration records obtained in the 1995 Kobe Earthquake and the 2008 Wenchuan Earthquake were used to investigate how ground motion intensity, ground motion characteristics, and aftershocks affect the seismic response of the CFST-BBC pier. Meanwhile, an extensive time-history analysis of 17 fiber-based finite element models (FFEMs) under 20 different ground motions was performed to reveal the influence of the ground motion intensity, the same-intensity aftershock, and the main structural parameters on the elastoplastic seismic response of the CFST-BBC pier. Finally, a two-stage checking method suitable for the seismic performance of the CFST-BBC pier under the E1-level frequent earthquake and the E2-level rare earthquake was proposed. Verified by experimental and FFEM analysis results, the proposed checking method can accurately and effectively evaluate the strength and deformation capacity of the CFST-BBC piers under strong earthquakes.

先前的研究证明，CFST（钢管混凝土）板条固定柱（CFST-BBC）在横向循环反复荷载下具有良好的滞后耗能能力和变形能力。为了进一步了解这种复合结构在强地震下的弹塑性地震响应特征，首先对1/8比例CFST-BBC墩标本进行了两次拟动力试验。利用1995年神户地震和2008年汶川地震获得的加速度记录，研究地震动强度，地震动特征和余震如何影响CFST-BBC墩的地震响应。同时，在20种不同的地面运动下，对17种基于纤维的有限元模型（FFEM）进行了广泛的时程分析，以揭示地面运动强度，相同强度的余震以及主要结构参数对弹塑性地震响应的影响CFST-BBC码头。最后，提出了一种适用于CFST-BBC墩在E1级地震和E2级罕见地震下的抗震性能的两阶段检验方法。通过实验和FFEM分析结果验证，所提出的检查方法可以准确有效地评估强震作用下CFST-BBC墩的强度和变形能力。提出了一种适用于CFST-BBC墩在E1级地震和E2级罕见地震下的抗震性能的两阶段检验方法。通过实验和FFEM分析结果验证，所提出的检查方法可以准确有效地评估强震作用下CFST-BBC墩的强度和变形能力。提出了一种适用于CFST-BBC墩在E1级地震和E2级罕见地震下的抗震性能的两阶段检验方法。通过实验和FFEM分析结果验证，所提出的检查方法可以准确有效地评估强震作用下CFST-BBC墩的强度和变形能力。