Within the diploma thesis, the effect of explosions on the structure is described. 6 arch bridges on the Adriatic coast were analyzed and the necessary amount of explosion for the demolition of the pillars of these bridges were calculated. The required amount of explosive is shown in tirnitrotoluen and plastic explosive. Calculations have been made for both complete demolition of columns and outbreak of concrete (where possible). A new bridge on the mainland was also analyzed, and that is the bridge in the vicinity of Slatina, desegned according to the current codes. A calculation of the demolition of the bridge was made to see where the explosives needed to be placed, with the best performance. Calculations were made for the demolition of the lower structure (columns) and the upper structure (pavement slab). The answer is given to the question where it is best to place the explosive. Based on the calculation, the demolition of reinforced concrete slabs was carried out. The demolition of reinforced concrete slabs was compared to the demolition of reinforced concrete columns that took place in 2019. and it was concluded which element required more explosives and which element was more difficult to demolish.