Energy-related facilities in waterfront area are required to have seismic performance to continue energy supply after large-scale earthquakes in the near future. Since marine oil terminals with pile-type dolphins have loading arms and piping connected to the reservoir on the land side, it is necessary to suppress the response acceleration and displacement of the pier deck and damage to the piles during earthquakes.
To propose a reinforcement method that satisfies these requirements, a shake table test for a pile-type dolphin using supplemental damping devices was carried out. The dolphin has additional structures having high rigidity with inclined piles on both sides of the pier and supplemental damping devices between the pier and the additional structures. As a result of the shake table test, it was found that the response acceleration and displacement of the surface of the pier are reduced and the damage to the piles is suppressed by absorption of the energy during the shake by the supplemental damping devices. Moreover, it was also found that seismic response reduction of loading arms on the pier is expected.
Furthermore, seismic response analysis for model-scale was carried out and confirmed the reproducibility of the shake table test results. It was found that the reinforcement has a large damping effect even under conditions close to the actual structure.

Key Words: Pile-type dolphin, supplemental damping device, seismic retrofit, shake table test, seismic response analysis