Mechanical Behavior and Damage Evolution of a Fabricated Rectangular Tunnel with a Mortise-and-Tenon Joint under Internal Explosion
Publication: Journal of Performance of Constructed Facilities
Volume 37, Issue 1
Abstract
A new mortise-and-tenon joint for a fabricated rectangular tunnel is designed in this study. To explore the damage evolution of a fabricated rectangular tunnel with a mortise-and-tenon joint under internal explosion, a refined numerical model is established by using Abaqus finite element software. The sensitivity of the explosion resistance of a rectangular tunnel to different trinitrotoluene (TNT) equivalents, concrete strength grades, scaled distances, and types of joints is analyzed. The spatiotemporal effect and damage characteristics of the fabricated rectangular tunnel after a central explosion are discussed. Finally, the deformation characteristics of the tunnel corner are quantified by defining a tunnel deformation angle. The results show that the tunnel is more sensitive to the explosion equivalent and less sensitive to the concrete strength grade, and the tunnel roof is highly sensitive to TNT at different distances. The damage of the fabricated rectangular tunnel under an explosion wave has significant spatiotemporal evolution characteristics. The roof and floor of the tunnel are first impacted by explosion, and their reflection on the explosion wave will significantly enhance the explosion effect. The joint of the prefabricated tunnel has small stiffness and large flexibility, and the reflection enhancement effect on the shock wave is weak. The impact of explosive waves results in tensile stresses on the outside of the roof and floor of the tunnel and on the connection of the midpartition, where the explosion resistance is weak. The tunnel deformation angle is used to quantify the deformation damage characteristics of the tunnel. The results show that the safety height of the vehicle in the tunnel should be controlled within 3.8 m. The current research provides some valuable information for the future antiexplosion design and evaluation of the prefabricated frame tunnel.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (52208388), Guangxi Science and Technology Base and Talent Special Project (No. AD21220039), Guangxi Natural Science Foundation (No. 2022GXNSFBA035580), and the Science and Technology Progress and Innovation Plan Project of the Department of Transportation of Hunan Province (No. 202147).
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Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 37 • Issue 1 • February 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Mar 16, 2022
Accepted: Sep 20, 2022
Published online: Nov 16, 2022
Published in print: Feb 1, 2023
Discussion open until: Apr 16, 2023
ASCE Technical Topics:
- Construction engineering
- Construction industry
- Construction management
- Continuum mechanics
- Deformation (mechanics)
- Disaster risk management
- Disasters and hazards
- Dynamics (solid mechanics)
- Engineering mechanics
- Explosions
- Fabrication
- Geotechnical engineering
- Joints
- Man-made disasters
- Materials engineering
- Materials processing
- Offsite construction
- Roofs
- Shock waves
- Solid mechanics
- Structural engineering
- Structural mechanics
- Structural members
- Structural systems
- Tunnels
- Waves (mechanics)
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