Influence of 3D spatial effect of underground structure on the nonlinear seismic response of subway station based on the comparison of 2D and 3D models
Tunnelling and Underground Space Technology（2023）
Abstract
•Influence of 3D spatial effects of underground structure on its seismic response.•2D model cannot correctly reflect deformation characteristics at 1/2 length of 3D model.•Results of 2D model roughly equivalent to that at 1/4 length of 3D model.•In-plane bending deflection of slabs well reflect structural 3D cooperative work degree.•Conversion coefficients from 2D model to 3D model with 95% probability guarantee.
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Key words
Underground station structure, Dynamic soil-structure interaction (SSI), Structural spatial effects, Earthquake damage, Conversion coefficient, Finite element method
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