A combination of physical model tests and numerical analyses was utilized to study the effects of an explosion on an underground tunnel, located below a body of water. Strains induced on the tunnel because of the explosion were measured in centrifuge model tests conducted at 70 g. Three-dimensional numerical analyses using an explicit dynamic hydrocode were also conducted. The results of the numerical analyses showed favorable comparison with those from centrifuge model tests. The results indicated that, for the same mass of explosives, the damage to the tunnel increased with increasing height of water up to a certain maximum height. When the water level was increased beyond this height, the magnitude of damage remained relatively unchanged and did not appear to increase further.
展开▼
