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Research papers, The University of Auckland Library

Seismic retrofitting of unreinforced masonry buildings using posttensioning has been the topic of many recent experimental research projects. However, the performance of such retrofit designs in actual design level earthquakes has previously been poorly documented. In 1984 two stone masonry buildings within The Arts Centre of Christchurch received posttensioned seismic retrofits, which were subsequently subjected to design level seismic loads during the 2010/2011 Canterbury earthquake sequence. These 26 year old retrofits were part of a global scheme to strengthen and secure the historic building complex and were subject to considerable budgetary constraints. Given the limited resources available at the time of construction and the current degraded state of the steel posttension tendons, the posttensioned retrofits performed well in preventing major damage to the overall structure of the two buildings in the Canterbury earthquakes. When compared to other similar unretrofitted structures within The Arts Centre, it is demonstrated that the posttensioning significantly improved the in-plane and out-of-plane wall strength and the ability to limit residual wall displacements. The history of The Arts Centre buildings and the details of the Canterbury earthquakes is discussed, followed by examination of the performance of the posttension retrofits and the suitability of this technique for future retrofitting of other historic unreinforced masonry buildings. http://www.aees.org.au/downloads/conference-papers/2013-2/

Images, UC QuakeStudies

A photograph of the wall of a street football arena built by Student Volunteer Army volunteers. The wall has a sign attached acknowledging the support of Resene, and is painted with the words, 'Red zone timber'.

Images, UC QuakeStudies

Photograph captioned by BeckerFraserPhotos, "People at the cordon on the corner of Durham and St Asaph Street, soldiers watching by. In the background is the Environment Court building at 83 Armagh Street, formerly the Canterbury Society of Arts. This building was added to the CERA demolitions list on 5 March 2012".

Images, UC QuakeStudies

A photograph of a paste-up depicting Roger Sutton, the CEO of CERA, with a band-aid over his mouth; Warwick Isaacs, the Deputy Chief Executive of CERA, with hearing protection over his ears; and Jerry Brownlee, Minister for Canterbury Earthquake Recovery, with a blindfold over his eyes. The paste-up has been stuck on a bus stop timetable.

Images, UC QuakeStudies

A photograph of a paste-up depicting Roger Sutton, the CEO of CERA, with a band-aid over his mouth; Warwick Isaacs, the Deputy Chief Executive of CERA, with hearing protection over his ears; and Jerry Brownlee, Minister for Canterbury Earthquake Recovery, with a blindfold over his eyes. The paste-up has been stuck on a wall.

Images, UC QuakeStudies

A photograph of a paste-up depicting Roger Sutton, the CEO of CERA, with a band-aid over his mouth; Warwick Isaacs, the Deputy Chief Executive of CERA, with hearing protection over his ears; and Jerry Brownlee, Minister for Canterbury Earthquake Recovery, with a blindfold over his eyes. The paste-up has been stuck on a sign board attached to a cordon fence.