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Research papers, The University of Auckland Library

This thesis describes the strategies for earthquake strengthening vintage clay bricks unreinforced masonry (URM) buildings. URM buildings are well known to be vulnerable to damage from earthquake-induced lateral forces that may result in partial or full building collapse. The 2010/2011 Canterbury earthquakes are the most recent destructive natural disaster that resulted in the deaths of 185 people. The earthquake events had drawn people’s attention when URM failure and collapse caused about 39 of the fatality. Despite the poor performance of URM buildings during the 2010/2011 Canterbury earthquakes, a number of successful case study buildings were identified and their details research in-depth. In order to discover the successful seismic retrofitting techniques, two case studies of retrofitted historical buildings located in Christchurch, New Zealand i.e. Orion’s URM substations and an iconic Heritage Hotel (aka Old Government Building) was conducted by investigating and evaluating the earthquake performance of the seismic retrofitting technique applied on the buildings prior to the 2010/2011 Canterbury earthquakes and their performance after the earthquakes sequence. The second part of the research reported in this thesis was directed with the primary aim of developing a cost-effective seismic retrofitting technique with minimal interference to the vintage clay-bricks URM buildings. Two retrofitting techniques, (i) near-surface mounted steel wire rope (NSM-SWR) with further investigation on URM wallettes to get deeper understanding the URM in-plane behaviour, and (ii) FRP anchor are reported in this research thesis.

Images, UC QuakeStudies

A photograph looking east down Cashel Street towards the intersection of Colombo Street. A section of one of the buildings on the left has collapsed and the rubble has spilled onto the street. A van has been crushed by the fallen rubble. The message, 'clear', has been spray-painted on the windscreen of the van. In the foreground signs from several shops are still on the street. There is also earthquake damage to the building on the right. Sections of this building's facade have crumbled and the bricks have spilled onto the street below, damaging the awning.

Images, UC QuakeStudies

Damage to the Community of the Sacred Name building on Barbadoes Street. The gable ends of the building have collapsed, and bricks have fallen to the footpath below. The building is surrounded by security fencing. The photographer comments, "A bike ride around the CBD. Nunnery, Barbadoes St".

Images, UC QuakeStudies

Damage to the Community of the Sacred Name building on Barbadoes Street. The gable ends of the building have collapsed, and bricks have fallen to the footpath below. The building is surrounded by security fencing. The photographer comments, "A bike ride around the CBD. Nunnery, Barbadoes St".