A series of centrifuge shaking table tests were performed on a new type of foundation, the composite caisson-piles foundation (CCPF) which is recently suggested for the cross-sea bridge or offshore engineering, to investigate its seismic response. The CCPF model with 2 × 2 and 3 × 3 pile groups embedded in homogeneous clayey silt or layered soil consisting of dry sand underlain by clayey silt were employed, these being representative of different pile configurations and soil conditions respectively, with the superstructure simplified as lumped mass and connecting column. The horizontal acceleration and lateral displacement of the soil and superstructure, as well as bending moment of piles were recorded during seismic shaking. Due to the complex soil-CCPF-structure interaction, the composite caisson-piles foundation with the two type pile groups in homogeneous or layered soil exhibited quite different behaviors under earthquake loading. These centrifuge test results indicated that both soil condition and pile configuration played an important role in the seismic response of the CCPF, and future studies combining experimental and numerical simulation should be conducted to investigate more factors influencing the seismic behavior of the composite caisson-piles foundation.

在新型基础上进行了一系列的离心振动台试验，最近提出了用于跨海桥梁或海上工程的复合沉箱基础（CCPF），以研究其地震响应。采用2×2和3×3桩群的CCPF模型嵌入均质黏土淤泥或由黏土淤泥下的干砂组成的层状土中，分别代表不同的桩型和土壤条件，上部结构简化为集总质量和连接柱。在地震晃动过程中，记录了土体和上部结构的水平加速度，横向位移以及桩的弯矩。由于复杂的土壤-CCPF-结构相互作用，均质或层状土壤中具有两种桩基的复合沉箱基础在地震荷载下表现出截然不同的行为。这些离心机测试结果表明，土壤条件和桩构型在CCPF的地震响应中都起着重要作用，应结合实验和数值模拟进行进一步研究，以研究更多影响复合沉箱基础抗震性能的因素。 。