Research on the damage to bridge structure and deck target by penetratingexplosive warhead

DOI:	10.11809/bqzbgcxb2023.11.002
Keywords:	penetrating explosive warhead; bridge target; numerical simulation; damage assessment
Abstract:	In order to obtain the law of influence of terminal ballistic parameters of penetrating explosive warhead on the damage effect of bridge and deck target, a nonlinear dynamic simulation model of the whole process of warhead penetration and detonation of bridge is established, and the crack, structural failure distribution and the propagation law of bridge deck shock wave are analyzed under different penetration velocity and different detonation delay. The results show that the flexural capacity of the damaged bridge is calculated based on the failure distribution of the bridge. When the penetration speed is 800 m/s, the delayed detonation of 1.95 ms to 2.95 ms can minimize the flexural capacity of the box girder. The detonation time delay of 14.95 ms can make the maximum length of concrete pier collapse with the lowest bearing capacity. Based on the damage criterion of shock wave overpressure to the target, when the penetration speed is 800 m/s, the delayed detonation of about 0.95 ms can seriously injure or kill the personnel on the bridge deck within 3 m radius of detonation, and the armored vehicle is slightly or moderately damaged. The research results can provide a reference for the reasonable setting of penetration speed and detonation time of the invading warhead and for increasing the damage degree of the bridge.
Issue:	Vol. 44 No. 11 (2023)
Published:	2023-11-28
PDF HTML