Performance of buried tunnels subjected to surface blast incorporating fluid structure interaction

Koneshwaran, Sivalingam, Thambiratnam, David P., & Gallage, Chaminda (2014) Performance of buried tunnels subjected to surface blast incorporating fluid structure interaction. Journal of Performance of Constructed Facilities.

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Abstract

This paper uses finite element techniques to investigate the performance of buried tunnels subjected to surface blasts incorporating fully coupled Fluid Structure Interaction and appropriate material models which simulate strain rate effects. Modelling techniques are first validated against existing experimental results and then used to treat the blast induced shock wave propagation and tunnel response in dry and saturated sands. Results show that the tunnel buried in saturated sand responds earlier than that in dry sand. Tunnel deformations decrease with distance from explosive in both sands, as expected. In the vicinity of the explosive, the tunnel buried in saturated sand suffered permanent deformation in both axial and circumferential directions, whereas the tunnel buried in dry sand recovered from most of the axial deformation. Overall, response of the tunnel in saturated sand is more severe for a given blast event and shows the detrimental effect of pore water on the blast response of buried tunnels. The validated modelling techniques developed in this paper can be used to investigate the blast response of tunnels buried in dry and saturated sands.

Impact and interest:

2 citations in Scopus
2 citations in Web of Science®
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30 since deposited on 10 Mar 2014
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ID Code: 68158
Item Type: Journal Article
Refereed: Yes
Keywords: explosion, tunnel, Fluid Structure Interaction, strain rate effects, centrifuge test, saturated sand, Finite Element modelling
DOI: 10.1061/(ASCE)CF.1943-5509.0000585
ISSN: 1943-5509
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > Schools > School of Earth, Environmental & Biological Sciences
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 the American Society of Civil Engineers
Deposited On: 10 Mar 2014 00:15
Last Modified: 13 Mar 2015 05:19

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