Civil Engineering and Architecture Vol. 14(1), pp. 331 - 355
DOI: 10.13189/cea.2026.140121
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Dynamic Numerical Analysis of the Safety of Pedestrian Bridges in the Influence Zone of Metro Stations

Ke Ji , Boi-Yee Liao ^*
Department of Engineering, International College, Krirk University, Thailand

ABSTRACT

With the rapid development of urban rail transit, the impact of subway station construction on the structural safety of adjacent pedestrian bridges has garnered significant attention. Existing studies often focus on single aspects like dynamic monitoring or finite element simulation, lacking a comprehensive framework. This study aims to address the gap by proposing an integrated technical framework combining "three-dimensional finite element dynamic simulation – support structure optimization – on-site real-time monitoring." Using the Memorial Hall Station of Metro Line 13 as a case study, a composite support system was designed for specific strata (argillaceous siltstone, fully weathered silty clay), capable of withstanding vertical and horizontal pressures of 113.84 kPa and 78.81 kPa, respectively. A refined 3D finite element model was established using Midas Gen 2022. Results demonstrate that the optimized support system effectively controls deformation: maximum foundation displacements in X, Y, and Z directions were 1.6 mm, 2.5 mm, and 39.6 mm, respectively, and the maximum bending moment change in the steel box girder was ≤14.9 kN·m/m, all within code limits. The "pre-support pipe shed + step-by-step excavation" method limited differential settlement to 2.1 mm, far below the specification limit of 127 mm. On-site monitoring data showed 92% consistency with simulation results. This integrated framework ensures pedestrian bridge safety during subway construction, providing a technical reference for similar urban underground projects near existing structures.

KEYWORDS
Rail Transit Impact, Simulation Technique, Pedestrian Bridge, Structural Mechanics

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Ke Ji , Boi-Yee Liao , "Dynamic Numerical Analysis of the Safety of Pedestrian Bridges in the Influence Zone of Metro Stations," Civil Engineering and Architecture, Vol. 14, No. 1, pp. 331 - 355, 2026. DOI: 10.13189/cea.2026.140121.

(b). APA Format:
Ke Ji , Boi-Yee Liao (2026). Dynamic Numerical Analysis of the Safety of Pedestrian Bridges in the Influence Zone of Metro Stations. Civil Engineering and Architecture, 14(1), 331 - 355. DOI: 10.13189/cea.2026.140121.