In this study, damage assessment model of curved steel–concrete–steel (CSCS) sandwich shells subjected to impact loads was investigated. A numerical simulation method was applied to obtain failure modes of CSCS sandwich shells under impact load by changing the impact velocity as well as the mass and diameter of the hammer. From the 108 finite element (FE) models, three failure modes were found: local deformation, top steel plate fracture, and penetration. The failure mechanism for each failure mode was analyzed based on numerical simulation results, such as impact force and displacement-time histories, varying internal energy, and deformation modes of the structures. The law of failure mode distribution of the CSCS sandwich shell was also summarized. Moreover, the impact force–displacement relationship was obtained using an analytical method, and the FE results were in acceptable agreement with experiments. Finally, damage assessment model of the CSCS sandwich shells was obtained by comparing the hammer initial kinetic energy with the maximum absorbed energy of the CSCS sandwich shell. This model can be used as a quick tool to judge the failure status of the CSCS sandwich shell. The work presented in this paper is of significance and can fill the gap of the damage assessment model of CSCS sandwich shells subjected to impact loads.
Numerical and Theoretical Study on Failure Characteristics and Damage Assessment Model of Curved Steel-Concrete-Steel Sandwich Shells Subjected to Impact Load
KSCE J Civ Eng
KSCE Journal of Civil Engineering ; 27 , 10 ; 4274-4287
2023-10-01
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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