Study of Anti-blasting Ability of Damaged Underground Arch Structure after Earthquake

doi:10.3969/j.issn.1000-1093.2017.09.010

Abstract

Abstract: The evaluation of anti-blasting ability of underground structures has become a new research subject since earthquake can seriously damage the underground structures. A semicircular arch structure with radius of arch of 3.0 m and height of side wall of 3.0 m is simulated, and seven kinds of cracks at different locations are presumed. TrueGrid is used to construct a mesh model, and then the anti-blasting ability of underground arch structure is numerically simulated by LS-DYNA. The results show that the anti-blasting ability of underground arch structure with a crack is dropped by more than 50%. The anti-blasting ability of underground arch structure is affected by the location of cracks. The cracks between floor and side wall have the greatest effects on its anti-blasting ability and the cracks in arch crown have the least effects on its anti-blasting ability. The anti-blasting ability of arch structure with multi-cracks is not obviously different to that of arch structure with a single crack, and the anti-blasting ability is equal to the least value of anti-blasting ability when the cracks exist singly. Key

Key words: explosionmechanics, earthquake, undergroundstructure, numericalsimulation

CLC Number:

TANG Ting, ZHOU Jian-nan. Study of Anti-blasting Ability of Damaged Underground Arch Structure after Earthquake[J]. Acta Armamentarii, 2017, 38(9): 1736-1744.

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第38卷
第9期2017 年9月兵工学报ACTA
ARMAMENTARIIVol.38No.9Sep.2017

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