Analytical solution for longitudinal seismic response of tunnel portal section subjected to SH waves considering wedge topography effect

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2025-04-13 DOI:10.1016/j.soildyn.2025.109448

Gong Chen , Haitao Yu

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Abstract

An analytical solution is proposed to evaluate the seismic response of tunnel portal section under horizontal incident shear waves. To obtain the solution, the ground topography near the portal is simplified to an infinite wedge elastic body, and the wedge diffraction theory is used. The formulas of the displacements and bending moment of tunnel structures under the incident wave is presented based on the elastic foundation-beam approach. The validation of the analytical solution is examined by comparing its results with those from finite element method. Results show that the responses of the liner near the tunnel portal are significantly amplified compared to those of deeply buried section far from the portal section. Parametric analyses are conducted to further investigate the effect of the incident angle and frequency of seismic input waves on the bending moment response of the liner in portal section. Moreover, the definition of the influence range of the portal section is presented, and its relationship to the slope angle and wave frequency is also discussed.

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来源期刊

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.