MODELLING OF REINFORCED CONCRETE SLABS UNDER IMPACT LOADING

摘要

This paper describes work conducted by the Canadian Nuclear Safety Commission (CNSC). Non-linear dynamic behavior of reinforced concrete slabs under impact loading by "hard" and "soft" missiles was analyzed using commercial Finite Element code LS-DYNA. FE predictions based on Winfrith concrete material model were compared with tests conducted by VTT Technical Research Centre (Finland) together with CNSC. Concrete reinforcement was modeled using beam FE coupled with 3-D concrete FE at coincident nodes. Two different test cases resulting in (a) flexural and (b) punching with perforation slab responses were simulated. The FE predictions were in good agreement with both test results. This modelling was part of the large International benchmark of numerical simulations of projectile impacts on reinforced concrete (RC) slabs that has been launched by OECD/NEA (The Organization for Economic Cooperation and Development/Nuclear Energy Agency) research program under the acronym IRIS_2012. The brief description of IRIS_2012 objectives, results and the place of the CNSC team modelling efforts were also discussed.