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The response of Rock Tunnel When Subjected to Blast Loading: Finite Element Analysis
  • Mohammad Zaid,
  • Md. Sadique
Mohammad Zaid
Aligarh Muslim University Faculty of Engineering and Technology
Author Profile
Md. Sadique
Aligarh Muslim University Faculty of Engineering and Technology
Author Profile

Abstract

Tunnels had been undergone accidental and intentional blast in the past. An analysis of a rock tunnel when subjected to internal blast loading has been presented in this paper. A three-dimensional finite element model of a huge rock mass comprising the tunnel has been developed in Abaqus/CAE. Diameter of the tunnel has been kept constant to a two-lane transportation tunnel. However, liner thickness of the concrete, overburden pressure on the tunnel has been varied to observe the response in different possible conditions. To incorporate the elastoplastic response of rock mass, Mohr-Coulomb constitutive material model has been considered. For modelling of trinitrotoluene (TNT), Jones-Wilkins-Lee material model has been adopted. Concrete Damage Plasticity material model has been adopted for tunnel lining. For the blast loading, Coupled-Eulerian-Lagrangian (CEL) model has been considered. Results highlight the importance of tunnel lining thickness and overburden depth while designing the tunnel in rocks. Under any amount of explosive, deep tunnels have been found to be safer than shallow tunnel.

Peer review status:Published

31 Jan 2020Submitted to Engineering Reports
04 Feb 2020Submission Checks Completed
04 Feb 2020Assigned to Editor
24 Apr 2020Reviewer(s) Assigned
27 May 2020Editorial Decision: Reject & Resub
18 Jul 20201st Revision Received
20 Jul 2020Assigned to Editor
20 Jul 2020Submission Checks Completed
24 Jul 2020Reviewer(s) Assigned
18 Aug 2020Editorial Decision: Revise Minor
30 Aug 20202nd Revision Received
30 Aug 2020Submission Checks Completed
30 Aug 2020Assigned to Editor
01 Sep 2020Editorial Decision: Accept
23 Sep 2020Published in Engineering Reports. 10.1002/eng2.12293