Techno Press
You logged in as Techno Press

Computers and Concrete
  Volume 27, Number 1, January 2021 , pages 1-12
DOI: https://doi.org/10.12989/cac.2021.27.1.001
 


Safety assessment of an underground tunnel subjected to missile impact using numerical simulations
Duc-Kien Thai, Duy-Liem Nguyen, Thanh-Tung Pham and Thai-Hoan Pham

 
Abstract
    This work presents a safety assessment of an underground tunnel subjected to a ballistic missile attack employing the numerical approach. For the impact simulation, a box shaped reinforced concrete (RC) structure with a cross section dimension of 8.0x10.0 m under a soil layer that was attacked by a SCUD missile was modeled using finite element (FE) software LS-DYNA. SCUD missile is one of a series of tactical ballistic missiles developed by Soviet Union during the Cold War, which is adopted for a short-range ballistic missile. The developed FE simulation for the penetration depth of the missile impacting into the soil structure was verified from the well-known formula of the penetration prediction. The soil-structure interaction, the soil type, and the impact missile velocity effects on the penetration depth of the missile into the different soil types were investigated. The safety assessment of the underground tunnel was performed with regard to the different depths of the underground tunnel. For each missile velocity and soil type, a specific depth called the unsafe depth was obtained from the analysis results. The structure beneath the soil beyond this depth remains safe. The unsafe depth was found to be increased with the increasing missile velocity.
 
Key Words
    underground tunnel; missile impact; safety assessment; numerical simulation; and dynamic analysis
 
Address
Duc-Kien Thai: Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul, 143-747, Korea
Duy-Liem Nguyen: Department of Civil Engineering and Applied Mechanics, Ho Chi Minh City University of Technology and Education, 1 Vo Van Ngan St., Thu Duc District, Ho Chi Minh City, Vietnam
Thanh-Tung Pham: Department of Concrete Structures, National University of Civil Engineering, 55 Giai Phong, Hanoi, Vietnam
Thai-Hoan Pham: Department of Concrete Structures, National University of Civil Engineering, 55 Giai Phong, Hanoi, Vietnam
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2024 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: info@techno-press.com