Combined effects of penetration and explosion on damage characteristics of a mass concrete target

Abstract

Abstract. With the development of the precision guidance technology, the earth-penetrating weapon (EPW) is a huge threat to infrastructures. The objective of this research is to investigate the damage characteristics of mass concrete targets under the combined action of penetration and explosion. The validity of the penetration model is discussed by reproducing a previous experimental test reported in the literature. Meanwhile, a field test about the internal explosion in a concrete cube is conducted to verify the validity of the internal explosion model. Subsequently, damage characteristics of a mass concrete target from the upper part of a concrete gravity dam are discussed when subjected to the combined action of the penetration and explosion. In order to improve the structural performance of the mass concrete target to penetration and explosion loadings, high strength concrete material is selected as a preventive measure. Penetration processes and damage patterns of the mass target with normal and high strength concrete material are compared. Then, three internal explosion models are presented to investigate the influence of the initial penetration damage on the failure characteristics of the mass concrete target. The results show that the resistance of the mass target to the combined action of the penetration and explosion can be enhanced significantly by using the high strength concrete material. The initial penetration damage has a significant influence on the damage processes of the mass concrete target subjected to internal blast loading.

Structures under Synergetic Effects of Combined Blast and Impact Loads: A State‐of‐the‐Art Review

“…Also, the researchers [19][20][21][22][23][24][25] studied combined blastimpact loading scenario on different panels with composites and laminates. Furthermore, the combined effect of aforementioned loading scenario was also investigated on mass concrete by some researchers including [4,26,27].…”

“…Yang et al [4] characterized damage modes of mass concrete target by simulating tip edge of concrete gravity dam when subjected to combined blast and impact loads. With the help of a nonlinear FEA packaged computational program (AUTODYN), the authors proposed three internal explosion models for the sake of computing effect of initial penetration processes and respective failures of a high-velocity projectile motion effects on damage modes of a specimen (mass concrete target).…”

“…Researchers anticipated that synergetic e ects of combined blast-impact (or impact-blast) loading scenario could happen in another di erent conditions. One example is a cased explosive material with large scaled distances detonates on which the fragments from the case hit a given structure prior to blast induced shock wave; another example is the case on which vehicles and vessels carrying explosive materials crashed with a barrier (structure) leading a rst impact load followed by explosion from the cargo points which may also be combined loading cases of impact-blast [4,5].…”

“…Moreover the papers [3,[16][17][18] numerically studied combined effects of blast and fragment loading on walls whereas researchers [19][20][21][22][23][24][25] investigated combined blast-impact loading scenario on different plates, panels, and decks. Furthermore, combined effect of aforementioned loading scenario was also investigated on mass concrete [4,26,27].…”

Study on Rock Damage Mechanism for Lateral Blasting under High In Situ Stresses

“…The minimum damaged residual strain (ε m p ) can be determined by the calibration of the physical model test. The remaining model parameters in this study, which are not sensitive to the numerical results, are referred to the cemented sand parameters in the literatures [28,29]. The determined RHT parameters are listed in Table 2.…”