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Images, eqnz.chch.2010

Christchurch's old central city police station building will now be demolished on Sunday by implosion. Another one of Christchurch recognisable buildings to be given a death sentence following the earthquakes of 2010/2011. Photo by Geoff Trotter at www.dreamdreams.co.nz

Research papers, University of Canterbury Library

The seismic performance and parameter identification of the base isolated Christchurch Women’s Hospital (CWH) building are investigated using the recorded seismic accelerations during the two large earthquakes in Christchurch. A four degrees of freedom shear model is applied to characterize the dynamic behaviour of the CWH building during these earthquakes. A modified Gauss-Newton method is employed to identify the equivalent stiffness and Rayleigh damping coefficients of the building. The identification method is first validated using a simulated example structure and finally applied to the CWH building using recorded measurements from the Mw 6.0 and Mw 5.8 Christchurch earthquakes on December 23, 2011. The estimated response and recorded response for both earthquakes are compared with the cross correlation coefficients and the mean absolute percentage errors reported. The results indicate that the dynamic behaviour of the superstructure and base isolator was essentially within elastic range and the proposed shear linear model is sufficient for the prediction of the structural response of the CWH Hospital during these events.

Images, UC QuakeStudies

A photograph of the former site of Westende Jewellers and Alva Rados, on the corner of Manchester Street and Worcester Street. The building was badly-damaged in the 4 September earthquake and was demolished soon afterwards. A two-storey building was built on the site and completed in July 2012. The building then had to be removed when the decision was made to widen Manchester Street as part of the draft transport plan for central Christchurch. The photograph was modelled after an image taken by Ian McGregor from Fairfax Media in September 2010.

Images, UC QuakeStudies

A photograph of the former site of Westende Jewellers and Alva Rados, on the corner of Manchester Street and Worcester Street. The building was badly-damaged in the 4 September earthquake and was demolished soon afterwards. A two-storey building was built on the site and completed in July 2012. The building then had to be removed when the decision was made to widen Manchester Street as part of the draft transport plan for central Christchurch. The photograph was modelled after an image taken by Ian McGregor from Fairfax Media in September 2010.