Underwater Explosion near a gravity dam

In this case, the damage prediction of concrete gravity dams subjected to two underwater explosion shock loading is presented through a practical tutorial. The concrete dam is modeled as a three-dimensional solid part. The TNT, water, and air are modeled as an Eulerian part. The rock foundation is modeled as a three-dimensional solid part. Blasting loads have come to be forefront of attention in recent years due to the great number of accidental explosions, intentional events, or terrorist bombing attacks that affected the safety and stability of some important infrastructures such as government buildings, embassy buildings, bridges, and high dams. The damage prediction of important infrastructures under blast loads is crucial in structural engineering, which has gained importance in recent years. Dams are an important lifeline of engineering that have contributed to the development of civilization for a long time. Due to their significant political and economic benefits, they are possible targets for terrorist attacks or intentional explosions. The possible failure of dams retaining large quantities of water can cause the most undesirable impact on the downstream populated area, along with a considerable amount of devastation, clearly indicating that it is essential to protect dam structures against explosions. This enlightens the importance for researchers and structural engineers to gain a better understanding of dams’ response to explosive loads. The Concrete Damaged Plasticity model is selected for the dam under blast load to represent the tension and compression damage. The ideal gas equation of state is used to model the air's behaviour. The Us-Up EOS is also used to model the water material model. The JWL equation of state for both TNT parts is selected to demonstrate the true behaviour of the explosive charge. The Johnson-Holmquist material model through code is considered for the rock foundation to observe the damage and failure of that.