Abstract
AbstractThe low-velocity impact performance of curved steel–concrete-steel (CSCS) sandwich shells was investigated. Experimental results including impact force history, displacement history and permanent deformation were analyzed to reveal the influences of concrete thickness, steel plate thickness and spacing of shear connectors on the impact performances of CSCS shells. The impact process consisted of three stages, i.e., inertial stage, loading stage and unloading stage. The presence of bolt connectors was proven to be an effective way to prevent the detachment of steel plates from concrete core. Moreover, Finite Element (FE) method was used to simulate the CSCS shells subjected to impact load. The accuracy of the FE model was verified by comparing the impact load history, displacement history and failure mode obtained from FE simulations with test results. It turned out that the concrete core was the main part to dissipate impact energy, followed the by top steel plate and bottom steel plate.KeywordsCurved steel–concrete-steel shellImpact loadingFailure mechanismAnalytical model
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