Dynamic response of underground tunnel to explosive loading from penetration weapons in the critical collapse distance

Feng Hui-ping; Liu Hong-bing; Zuo Xing; Hui Lang-lang

doi:10.11883/1001-1455(2014)05-0539-08

Volume 34 Issue 5

Dec. 2014

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Feng Hui-ping, Liu Hong-bing, Zuo Xing, Hui Lang-lang. Dynamic response of underground tunnel to explosive loading from penetration weapons in the critical collapse distance[J]. Explosion And Shock Waves, 2014, 34(5): 539-546. doi: 10.11883/1001-1455(2014)05-0539-08

Citation:

Feng Hui-ping, Liu Hong-bing, Zuo Xing, Hui Lang-lang. Dynamic response of underground tunnel to explosive loading from penetration weapons in the critical collapse distance[J]. Explosion And Shock Waves, 2014, 34(5): 539-546. doi: 10.11883/1001-1455(2014)05-0539-08

Citation:

Feng Hui-ping, Liu Hong-bing, Zuo Xing, Hui Lang-lang. Dynamic response of underground tunnel to explosive loading from penetration weapons in the critical collapse distance[J]. Explosion And Shock Waves, 2014, 34(5): 539-546. doi: 10.11883/1001-1455(2014)05-0539-08

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Dynamic response of underground tunnel to explosive loading from penetration weapons in the critical collapse distance

doi: 10.11883/1001-1455(2014)05-0539-08

School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China

Received Date: 2013-03-27
Rev Recd Date: 2013-05-22
Publish Date: 2014-09-25

Abstract

Abstract

Based on ANSYS/LS＿DYNA, the multi-material fluid-solid coupling method was adopted to numerically simulate the dynamic responses of an underground straight-wall-arch tunnel to the penetration and explosion of a guided bomb GBU-28.The explosion of the guided bomb GBU-28was initiated at the critical collapse distance of the straight-wall-arch tunnel.The criterions were obtained for evaluating the dynamic stability of the surrounding rock and the dynamic strength of the lining concrete.The obtained criterions were used to analyze the simulated results and explore the interaction between the tunnel lining and the surrounding rock.When the guided bomb explodes at the critical collapse distance of the straight-wall-arch tunnel, the investigated results display the followings:(1)the surrounding rock is in the critical damage state, and the concrete lining is stable and safe; (2)the effective stress peak at the vault is obvious, and under the strip charge condition, the effective stress in the near field of the explosion is higher than that under the group charge condition; (3)the spandrel takes on a stress concentration phenomenon; (4)at the characteristic positions, the interaction pressures between the surrounding rock and the concrete lining are coupled with the vibration speeds of the particles.
- mechanics of explosion,
- dynamic response,
- multi-material fluid-solid coupling,
- straightwall-arch tunnel,
- concrete lining,
- surrounding rock,
- explosive loading

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References(18)

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