Assessment of Response and Stiffness of Two-way Reinforced Concrete Slab against explosion using Genetic Algorithm and Response Surface Method

Conventional Analysis of Reinforced Concrete Slabs under blast load requires a long process. This process, in addition to being time consuming, does not determine the extent to which the geometric parameters of the slab are loaded. To overcome this problem, in this study, by Analyzing 351 different concrete slabs under blast load by LS-DYNA software, the maximum Deflection, its corresponding arrival time and Slab Stiffness were recorded. Then, by using the genetic algorithm method, by processing the data related to the maximum Deflection and its time, a direct relationship between the calculation of these parameters was extracted. Considering the nature of the relationship extracted from the Response Surface Method, the coefficients of the relationship variables presented for stiffness determined the importance of each variable in the stiffness of the slab. Finally, the cosine amplitude method has been used to determine the maximum sensitivity of the slab to geometric parameters and loading. The results of this study show that the explosive distance parameter (R) has the most effect and the cross-sectional variable of steel (AS) has the least effect on the maximum slab deflection. It has the maximum effect at the time of reaching the maximum deflection.