Pressure distribution and dynamic response of a submerged tunnel under explosion loading

DU Chuang; ZHANG Jiangpeng; ZHUANG Tieshuan; WU Jun; XU Wenxuan; ZHANG Tao

doi:10.11883/bzycj-2023-0255

Volume 44 Issue 5

May 2024

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DU Chuang, ZHANG Jiangpeng, ZHUANG Tieshuan, WU Jun, XU Wenxuan, ZHANG Tao. Pressure distribution and dynamic response of a submerged tunnel under explosion loading[J]. Explosion And Shock Waves, 2024, 44(5): 053202. doi: 10.11883/bzycj-2023-0255

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Pressure distribution and dynamic response of a submerged tunnel under explosion loading

doi: 10.11883/bzycj-2023-0255

1.
School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China
2.
Institute of Defense Engineering, Academy of Militory Science of PLA, Luoyang 471023, Henan, China

Received Date: 2023-07-20
Rev Recd Date: 2024-03-22

Available Online: 2024-03-22

Publish Date: 2024-05-08

Abstract

Abstract

In order to study the load distribution and dynamic response of tunnel structures under underwater explosion, a 1/10 scaled tunnel model was designed and manufactured, and underwater explosion tests were conducted for three times.The pressure, impulse, and displacement of the tunnel model were studied. The results show that the shock wave produces a significant water surface truncation effect in the shallow water area, which reduces the impulse near the water surface. The experimental value of the peak pressure of the free field shock wave is in good agreement with the theoretical value, and the error is within 20%. The peak pressure on the front surface of the circular cross-section tunnel is about 1.626－1.716 times that of the free field, the peak pressure on the top surface is about 55.4%－65.2% of the free field, and the peak pressure on the back surface is about 25.5%－31.3% of the free field. The impulse time history curve under the action of underwater explosion shows a clear step shape, and each bubble pulsation is accompanied by a corresponding increase in impulse.The displacement analysis shows that the underwater explosion causes the vibration of the tunnel structure. The vibration process can be divided into three stages: the rapid deformation of the tunnel structure, the large amplitude vibration of the tunnel structure, and the tremor of the tunnel structure. The maximum displacement of the tunnel structure occurs during the large amplitude vibration of the tunnel structure.
- submerged tunnel,
- underwater explosion,
- peak pressure,
- dynamic response,
- scaled model test

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References

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