Abstract Model tests are carried out in this research to investigate the dynamic behavior of multi-section cut-and-cover subway tunnels in the transverse direction by seismic motion, which has not been fully investigated up to now. Multi-section model and general single-track box-section model tunnels are installed in a soil vessel, and it is found that the sectional force corresponds to that obtained in the tunnel design. Then, L2 earthquake motion (Spectrum II), based on the design standard for railway structures, is applied to the soil vessel. The test results show that the bending moment and shear force are comparatively large in the center wall, although the tendency is different in the loading direction. Moreover, the results of a 3D dynamic finite element analysis for an evaluation of the model tests show approximately the same situation. This research provides various findings for establishing a seismic analysis method for multi-section cut-and-cover subway tunnels.

中文翻译：

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地铁隧道横向不均匀多节段地震动力特性研究

摘要 本研究通过模型试验研究了多节段明挖隧道地下隧道的横向动力特性，目前尚未对其进行充分研究。将多断面模型和一般单轨箱形断面模型隧道安装在土容器中，发现截面力与隧道设计中得到的截面力相对应。然后，将基于铁路结构设计标准的 L2 地震运动（频谱 II）应用于土壤容器。试验结果表明，尽管在加载方向上趋势不同，但中心壁的弯矩和剪力较大。此外，用于评估模型测试的 3D 动态有限元分析结果显示了大致相同的情况。