Estimation of oil overflow due to sloshing from oil storage tanks subjected to a possible Nankai Trough earthquake in Osaka bay area

Fully nonlinear sloshing simulations, using an in-house GPU computing code based on the explicit MPS method, are performed for a large-size oil storage tank installed with a floating roof by imposing the estimated strong ground motion of Nankai Trough earthquake as the external oscillation. As a result, significant amount of oil flows onto the floating roof and large amount of oil overflow from the tank is confirmed. The numerical result suggests the entire fire is one of major concerns for the assumed earthquake scenario. Finally sloshing simulations are repeated for small- and medium-size tanks, and then the total amount of outflow oil is estimated for the industrial complex of interest in the estimated Nankai Trough earthquake.