Re-Levelling & Base Isolation Retrofit of the Christchurch Art Gallery

Abstract eng:
In the aftermath of the 2011 Canterbury Earthquakes, higher building performances were demanded by building owners in order to protect non-structural components and building contents, which many times can be valued more than the building itself. In the case of the Christchurch Art Gallery, the building structurally performed well and was used as the emergency operations center for the New Zealand Civil Defense and the Canterbury Earthquake Recovery Authority (CERA) after the 22 Feb 2011 earthquake. However, damage did occur, in the terms of deep liquefaction which caused the Gallery to experience differential settlement and damage to some of the art collection due the high acceleration experienced inside the building. This paper presents the drivers, benefits and methods of an in-ground solution of re-levelling the Art Gallery and subsequent retrofitting base isolation to the Gallery’s super-structure. This solution was desired by the Christchurch City Council in order to ensure the future safety of the valuable art collection and the Art Gallery’s ability to continue to serve as the center of art and culture in Christchurch and the wider Canterbury. When completed in December 2015, this will be the first base isolation retrofit on South Island.

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