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Images, UC QuakeStudies

Photograph captioned by BeckerFraserPhotos, "The machinery used in the demolitions keeps getting more sophisticated as the taller buildings are dealt with. This is the large crane put in place to work on the deconstruction and demolition of the BNZ Building".

Images, UC QuakeStudies

Photograph captioned by BeckerFraserPhotos, "The machinery used in the demolitions keeps getting more sophisticated as the taller buildings are dealt with. This is the large crane put in place to work on the deconstruction and demolition of the BNZ Building".

Research papers, The University of Auckland Library

The Catholic Cathedral of the Blessed Sacrament is a category 1 listed heritage building constructed largely of unreinforced stone masonry, and was significantly damaged in the recent Canterbury earthquakes. The building experienced ground shaking in excess of its capacity leading to block failures and partial collapse of parts of the building, which left the building standing but still posing a significant hazard. In this paper we discuss the approach to securing the building, and the interaction of the structural, heritage and safety demands involved in a dynamic seismic risk environment. We briefly cover the types of failures observed and the behaviour of the structure, and investigate the performance of both strengthened and un-strengthened parts of the building. Seismic strengthening options are investigated at a conceptual level. We draw conclusions as to how the building performed in the earthquakes, comment on the effectiveness of the strengthening and securing work and discuss the potential seismic strengthening methods.