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|Title||Numerical Modeling of Blast Loads effects on a Reinforced Concrete Structure Using LS-DYNA Software|
|Title in Arabic||نمذجة تاثير احمال الانفجار على مبنى خرساني باستخدام برنامج ls - dyna|
Explosions near buildings can cause catastrophic damages on the building external and internal frames, and most important can cause injuries and loss of life to the occupants of these buildings. Due to these extreme conditions, efforts have been made in the last few decades to develop methods to evaluate the pressure loads generated from explosions and the structural response to these loads and to enhance the design of the structures to withstand it. Experiments on explosions can be very expensive, dangerous and time consuming compared to simulation using finite element analysis software. This study aims at modeling and analyzing a reinforced concrete structure under blast loading using finite element software LS-DYNA. The simulated structure consists of four columns supporting one way ribbed slab, designed to withstand regular loads. It was modeled using LS-Prepost and analyzed using LS-DYNA. The concrete and steel were represented using solid volume elements. The material models of concrete and steel were carefully chosen to represent the actual behavior of both materials. The verification of the developed model was carried out by comparing its deflection and spalling results with those obtained by reliable field experimental tests. The verification process indicated a close agreement between the results of the developed model and those obtained from actual experiments. Consequently, the verified model was utilized to study the effect of blast loading on a 3×3 m single story building, where the blast was in the middle of the building. The model was analyzed for two milliseconds. The blast wave reached the slab first then reached the columns causing deflection. The effect of increasing concrete strength was studied. The deflection of the structure was decreased slightly when higher strength concrete was used, and the concrete withstood higher stresses. The effect of changing the blast location was also investigated.
|Publisher||الجامعة الإسلامية - غزة|
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