Scattering effect of twin tunnels on adjacent monuments subjected to far-field earthquakes

Azadmanesh, Meysam; Vosoughifar, Hamidreza; Amelsakhi, Masoud; Razmkhah, Arash; Alielahi, Hamid

doi:10.22075/ijnaa.2024.36112.5348

Scattering effect of twin tunnels on adjacent monuments subjected to far-field earthquakes

Articles in Press

Document Type : Research Paper

Authors

Meysam Azadmanesh ¹

Hamidreza Vosoughifar ¹

Masoud Amelsakhi ²

Arash Razmkhah ¹

Hamid Alielahi ³

¹ Department of Civil Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

² Department of Civil Engineering, Qom University of Technology, Qom, Iran

³ Department of Civil Engineering, Zanjan Branch, Islamic Azad University, Zanjan, Iran

10.22075/ijnaa.2024.36112.5348

Abstract

The majority of previous research stated that the seismic response of structures adjacent to tunnels during an earthquake might differ from that of structures further away from tunnels. However, this issue is not addressed in the relevant codes for process design. This study used Hankel functions to evaluate the seismic response of structures adjacent to tunnels subjected to far-field earthquakes. The authors of this paper used MATLAB to create a new model called FESCAM. A set of Bessel function transform theories and numerical analyses was applied to design numerical solutions in the proposed model. An integrated approach can accomplish the analysis of plane pressure waves (P-waves) in twin circular tunnels in terms of scattering waves. The case study was selected as the Karim Khan Citadel and adjacent subway tunnels. The numerical simulation was conducted in two distinct scenarios: with and without twin tunnels. The results indicate that the maximum scattering occurred when the incoming wave angle was α=30°, and the tunnel angle was θ=90°. The overall results suggest no statistically significant difference between the two case study scenarios. When considering the citadel with and without twin tunnels, the horizontal and total displacements varied between 2.2-33.7% and 2.1-23.7 percent, respectively.

Keywords

Scattering waves

Twin tunnels

Monuments

Far-field Earthquake

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