Deformation Characteristics and Damage Assessment of Prefabricated Frame Tunnels after Central and External Explosions

Zhen Huang, Zhaojian Hu, Chenlong Zhang (), Zhijun Pan, Jie Hu and Xinpeng Chen
Additional contact information
Zhen Huang: Key Laboratory of Disaster Prevention and Structural Safety, School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
Zhaojian Hu: Key Laboratory of Disaster Prevention and Structural Safety, School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
Chenlong Zhang: Key Laboratory of Disaster Prevention and Structural Safety, School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
Zhijun Pan: Guangxi Road Construction Engineering Group Co., Ltd., Nanning 530001, China
Jie Hu: Guangxi Road Construction Engineering Group Co., Ltd., Nanning 530001, China
Xinpeng Chen: Guangxi Road Construction Engineering Group Co., Ltd., Nanning 530001, China

Sustainability, 2022, vol. 14, issue 16, 1-21

Abstract: The urban social environment is complex and changeable, and there are accidental and non-accidental explosion risks in tunnels. Performance analysis and assessment after tunnel explosions has become important work. In this study, a prefabricated frame structure (single-layer and double-layer) for urban road tunnels was designed. A three-dimensional refined dynamic response numerical model of a frame tunnel considering the joint effect was established, and the reliability of the modeling method was verified by a full-scale explosion test. Considering factors such as the explosion equivalent (100, 200, 300, and 400 kg), explosion distance (3, 6, 9, and 12 m), and central and external explosions, the deformation characteristics and damage evolution law of the prefabricated frame tunnel after the explosions were explored. The deformation failure mode of the prefabricated frame tunnel was analyzed. The study shows that the roof of a single-layer tunnel and the mid-partition of a double-layer tunnel are weak components of a prefabricated frame tunnel with steel column joints under a central explosion load. The deformation and damage at tunnel joints are greater than those at other positions. Under an external explosion load, the closer the explosion point is, the greater the damage and deformation of the prefabricated frame tunnel lining are. Furthermore, showing a high degree of locality. With the equal amplitude increase of the detonation distance (3–6 m, 6–9 m, 9–12 m), the lining displacement is relatively reduced by about 75.7%, 39.9%, and 10.0%, respectively, and the lining deformation is mainly represented by the overall bending deformation.

Keywords: prefabricated frame tunnel; deformation characteristic; damage assessment; explosion; numerical model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/16/9942/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/16/9942/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:16:p:9942-:d:885833

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().