Since 2003, policies and practices related to the reduction of CO2 gas emission from ships has been discussing by the International Maritime Organization. The representative emission index and indicator are the EEDI (Energy Efficiency Design Index) for the new ships and EEOI (Energy Efficiency Operational Indicator) during the voyage. In this paper a water tank test and procedure development are introduced for the purpose of improving EEDI. The results showed good agreement explaining the characteristics properly.

This study conducted seismic performance evaluation of externally reinforced water tank using shaking table test. From the shaking table test result, externally reinforced system shows sufficient stiffness for water tanks and high natural frequency over 8Hz. The test result also showed safety result of induced maximum stress of water tank shown in the allowable stress.