Behavior of precast segmental utility tunnel under ground surface Explosion: A numerical study

Qian, H; Li, J; Zong, Z; Wu, C; Pan, Y

Behavior of precast segmental utility tunnel under ground surface Explosion: A numerical study

Qian, H Li, J

Zong, Z Wu, C

Pan, Y

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Tunnelling and Underground Space Technology, 2021, 115, pp. 1-17
Issue Date:: 2021-09-01

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Field	Value	Language
dc.contributor.author	Qian, H
dc.contributor.author	Li, J https://orcid.org/0000-0003-2457-1994
dc.contributor.author	Zong, Z
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Pan, Y
dc.date.accessioned	2022-03-07T03:04:22Z
dc.date.available	2022-03-07T03:04:22Z
dc.date.issued	2021-09-01
dc.identifier.citation	Tunnelling and Underground Space Technology, 2021, 115, pp. 1-17
dc.identifier.issn	0886-7798
dc.identifier.issn	0886-7798
dc.identifier.uri	http://hdl.handle.net/10453/155006
dc.description.abstract	Over the past few decades, a large number of precast segmental utility tunnels have been constructed. Intensive research efforts have been devoted to understanding their performance under service and seismic loads. However, the vulnerability of precast segmental utility tunnels against accidental blast loads is seldom discussed. The present study performs a comprehensive numerical investigation on precast segmental utility tunnels against ground surface explosion. The numerical model is verified against testing data based on buried RC structures and semi-analytical equations in TM 5–855-1. Three types of precast tunnel connections are investigated, i.e., connection without shear keys, connection with trapezoid-shaped shear keys, and connection with wedge-shaped shear keys. The effects of detonation location and prestressing conditions are evaluated. The performances of precast segmental utility tunnels under low-level, medium-level and high-level threat explosions are obtained and compared with those of the conventional monolithic utility tunnel. Discussions on the dynamic responses and energy dissipation (ED) of different precast segmental utility tunnels are made. The influences of energy dissipating (ED) bar, shear link and burial depth on the dynamic responses of the precast segmental utility tunnel are also investigated numerically.
dc.language	English
dc.publisher	Elsevier
dc.relation.ispartof	Tunnelling and Underground Space Technology
dc.relation.isbasedon	10.1016/j.tust.2021.104071
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Behavior of precast segmental utility tunnel under ground surface Explosion: A numerical study
dc.type	Journal Article
utslib.citation.volume	115
utslib.for	0905 Civil Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-03-07T03:04:15Z
pubs.publication-status	Published
pubs.volume	115

Abstract:

Over the past few decades, a large number of precast segmental utility tunnels have been constructed. Intensive research efforts have been devoted to understanding their performance under service and seismic loads. However, the vulnerability of precast segmental utility tunnels against accidental blast loads is seldom discussed. The present study performs a comprehensive numerical investigation on precast segmental utility tunnels against ground surface explosion. The numerical model is verified against testing data based on buried RC structures and semi-analytical equations in TM 5–855-1. Three types of precast tunnel connections are investigated, i.e., connection without shear keys, connection with trapezoid-shaped shear keys, and connection with wedge-shaped shear keys. The effects of detonation location and prestressing conditions are evaluated. The performances of precast segmental utility tunnels under low-level, medium-level and high-level threat explosions are obtained and compared with those of the conventional monolithic utility tunnel. Discussions on the dynamic responses and energy dissipation (ED) of different precast segmental utility tunnels are made. The influences of energy dissipating (ED) bar, shear link and burial depth on the dynamic responses of the precast segmental utility tunnel are also investigated numerically.

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http://hdl.handle.net/10453/155006