Seismic Response of Cross Interchange Subway Stations in Soft Soil: Effects of Intersecting Structures and Inhomogeneous Deformation

ABSTRACT

Seismic response of cross interchange subway stations in soft soil is studied through dynamic time history analysis. The inhomogeneous deformation and internal forces of the structure are examined under moderate earthquakes, considering intersecting effects and ground motion frequency. Findings indicate that the intersecting part of two-story and three-story sections creates a rigid connection, increasing stiffness and unique deformation patterns. This leads to an abrupt distribution of internal forces and significantly affects lateral drift ratio, requiring careful consideration in seismic design. Low-frequency ground motions demonstrate distinct heterogeneity in racking deformation distribution. Insights contribute to improved seismic design of soft soil subway stations.

KEYWORDS:

• Seismic response
• cross interchange subway station
• numerical simulation
• inhomogeneous distribution
• seismic design

Acknowledgments

We would like to acknowledge financial support from National Natural Science Foundation of China (No. 42277163). There are no relevant financial or non-financial competing interests to report.

Disclosure Statement

No potential conflict of interest was reported by the author(s).

Data Availability Statement

Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request https://dataverse.harvard.edu/api/access/datafile/7036501.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (No. 42277163).