Damage characteristics and evaluation investigation of rigid projectiles penetrating steel-concrete-steel composite targets based on AHP-TOPSIS method

Abstract

The steel-concrete-steel (SCS) structures are widely used in construction engineering with its excellent load-bearing capacity. To investigate the damage characteristics and anti-penetration performance of the SCS targets, rigid projectile penetration tests were conducted. In this study, the macroscopic measurement and 3D scanning imaging techniques were used to record SCS target damage parameters. Strain and accelerometer sensors were used to investigate the dynamic response parameters of the target. A comprehensive AHP-TOPSIS evaluation model was constructed based on the damage parameters to evaluate the effect of structural configuration on the anti-penetration capability of the SCS targets. The results indicated that the deformation of the steel plate, the dimensions of the impact crater and the dynamic response were proportional to the impact velocity of the projectile. Moreover, the most severe damage to the backside occurred when the projectile velocity was lower than the perforation velocity. The damage modes of the target at three typical impact velocities were also summarized based on the damage characteristics. Furthermore, the weights of each damage index and the closeness of different SCS targets to the evaluation indexes were obtained using the established AHP-TOPSIS evaluation model. Finally, it was determined that the SCS target in the structure form of F2R5 had the best anti-penetration performance. The results of this paper provide a reference for the design and performance evaluation of the SCS structures.