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As a result of the ever increasing threat of terrorist activity, countless effort has been made to mitigate blast effect on structures so that they can withstand more severe explosion accidents without catastrophic failure, thus to reduce the number of human casualties. Indirect means such as using blast barrier to protect vulnerable infrastructures and people inside them are widely used. However, several recent terrorist attacks suggested that such indirect methods cannot effectively prevent attacks initiated by suicide bombers or suitcase bombs. Therefore, there is an urgent need to directly enhance the blast-resistance of important structures through using new structural types or new materials.Recently, concrete-filled steel tubes, as a relatively new steel-concrete composite structure, have attracted tremendous amount of attention in the civil engineering filed due to their high strength and excellent durability. A concrete filled double-skin steel tube (CFDST) is normally constructed by filling concrete in-between two concentrically placed steel tubes. The main advantage of this structural type is its passive confining pressure on the concrete filler resulted from the steel tubes. Due to the confining pressure, the strength and ductility of the concrete filler can be significantly enhanced whilst the buckling of steel tubes can be delayed, if not completely prevented, by the concrete filler.
In this simulation Johnson-Cook plasticity and damage criteria for steel squares ,for concrete Holmquist-Johnson material model was used to observe damage which happen on the concrete beam. You can see a figure about the parts and assembly at below
Dynamic explicit is appropriate for this analysis. To model blast load,CONWEP procedure was used to define air blast automatically. During the analysis the middle point has experience large deformation and you can see some figures of this simulation at below
You can provide CAE ,INP,and English video files of this simulation here. The cost of these files is Thirty Euros. you can click on the bellow bottom to beginning process
You can purchase the tutorial through a PayPal account, a Visa, or a Master card, just before payment,send me an email to this address: karampourp@gmail.com
