Title: Effects of the superficial layer overlying a half-space on the tunnel-soil-RC building dynamical interaction

Authors: Abderrahim Achouri; Mohamed Nadir Amrane

Addresses: Department of Civil Engineering and Hydraulics, Faculty of Sciences and Technology, University of Biskra, BP 415 RP, 7000, Biskra, Algeria ' Department of Mechanical Engineering, Faculty of Sciences and Technology, University of Biskra, BP 415 RP, 7000, Biskra, Algeria

Abstract: In this paper, the material and geometrical flexibility effects of a superficial layer overlying a half-space on the tunnel-soil-RC building dynamical interaction due to surface and underground traffic loads are studied numerically. Finite element Plaxis^2D software© under conditions of plane strain is used successfully. The material and the geometrical flexibility effects of the superficial layer are studied by varying the shear waves and the depth. The present study demonstrates that the tunnel-soil-structure dynamical interaction is clearly influenced by the superficial layer presence and its stiffness, depth and damping. The tendency of this influence is related to the location of the applied dynamical impact, especially for the building response. These results can be taken into consideration in the study and construction of realistic projects, especially sensitive ones. The accuracy of the numerical modelling results is discussed and validated with previous works in literature.

Keywords: tunnel-soil-RC building; dynamical interaction; superficial layer; traffic load; finite element analysis.

DOI: 10.1504/IJSTRUCTE.2021.116522

International Journal of Structural Engineering, 2021 Vol.11 No.3, pp.270 - 293

Received: 03 Oct 2019
Accepted: 01 Aug 2020
Published online: 27 Jul 2021 *

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