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Images for damage; more images...

Images, UC QuakeStudies

Looking in the cordon fence, the damaged Gough House, with windows boarded up and the Vintage Watch store on Hereford Street. On the fence is a sign that says 'Road closed' and another one advertising a Wilson's carpark

Images, UC QuakeStudies

A view of Victoria Street from Mod's Hair where the building and adjoining building have been damaged, and cordoned off with fencing and road cones. Piles of building rubble can be seen outside on the footpath and road.

Images, UC QuakeStudies

The front of Christ Church Cathedral showing its broken tower. Bracing has been placed on the front wall to limit further damage. Security fences have been placed around the cathedral to restrict access. The Wizard of Christchurch stands to the right.

Images, UC QuakeStudies

The Wizard of Christchurch talking to members of the public outside of the damaged Christ Church Cathedral. A walkway from Gloucester Street to the Square was opened up for a few days to allow the public a closer look at the cathedral.

Images, UC QuakeStudies

Looking from the intersection of Worcester Boulevard and Montreal Street. The damaged Arts Centre is in the background with some of its wall boarded up. Going past it is a red Christchurch Sightseeing Tour bus which offers tours of central Christchurch.

Images, UC QuakeStudies

The Citizens' Memorial statue beside the cathedral, with bracing around the neck and waist of the angel to prevent further damage. Taken on a day when a walkway was opened up between Re:Start Mall and Cathedral Square to allow temporary public access.

Images, UC QuakeStudies

A view of Victoria Street from Mod's Hair where the building and adjoining building have been damaged, and cordoned off with fencing and road cones. Piles of building rubble can be seen outside on the footpath and road.

Images, UC QuakeStudies

The Octagon Live Restaurant (formerly Trinity Church) on Worcester Street. Steel bracing has been placed on the tower to limit further damage from aftershocks. Sculptures of a cyclist, bungee jumper, rock climber and kayaker can be seen on the bracing posts.

Images, UC QuakeStudies

Damage to the Victoria Street clock tower which stopped at the time of the 22 February earthquake. Sections of the base have been covered by black plastic sheeting and shipping containers protecting the road from the danger of it falling.

Audio, Radio New Zealand

Work has finally begun dismantling Lancaster Park in Christchurch, six years after it was damaged beyond repair in the February earthquake. It comes at the same time the city's leaders debate what a new stadium could look like and who will pay.

Research papers, University of Canterbury Library

Rapid, reliable information on earthquake-affected structures' current damage/health conditions and predicting what would happen to these structures under future seismic events play a vital role in accelerating post-event evaluations, leading to optimized on-time decisions. Such rapid and informative post-event evaluations are crucial for earthquake-prone areas, where each earthquake can potentially trigger a series of significant aftershocks, endangering the community's health and wealth by further damaging the already-affected structures. Such reliable post-earthquake evaluations can provide information to decide whether an affected structure is safe to stay in operation, thus saving many lives. Furthermore, they can lead to more optimal recovery plans, thus saving costs and time. The inherent deficiency of visual-based post-earthquake evaluations and the importance of structural health monitoring (SHM) methods and SHM instrumentation have been highlighted within this thesis, using two earthquake-affected structures in New Zealand: 1) the Canterbury Television (CTV) building, Christchurch; 2) the Bank of New Zealand (BNZ) building, Wellington. For the first time, this thesis verifies the theoretically- and experimentally validated hysteresis loop analysis (HLA) SHM method for the real-world instrumented structure of the BNZ building, which was damaged severely due to three earthquakes. Results indicate the HLA-SHM method can accurately estimate elastic stiffness degradation for this reinforced concrete (RC) pinched structure across the three earthquakes, which remained unseen until after the third seismic event. Furthermore, the HLA results help investigate the pinching effects on the BNZ building's seismic response. This thesis introduces a novel digital clone modelling method based on the robust and accurate SHM results delivered by the HLA method for physical parameters of the monitored structure and basis functions predicting the changes of these physical parameters due to future earthquake excitations. Contrary to artificial intelligence (AI) based predictive methods with black-box designs, the proposed predictive method is entirely mechanics-based with an explicitly-understandable design, making them more trusted and explicable to stakeholders engaging in post-earthquake evaluations, such as building owners and insurance firms. The proposed digital clone modelling framework is validated using the BNZ building and an experimental RC test structure damaged severely due to three successive shake-table excitations. In both structures, structural damage intensifies the pinching effects in hysteresis responses. Results show the basis functions identified from the HLA-SHM results for both structures under Event 1 can online estimate structural damage due to subsequent Events 2-3 from the measured structural responses, making them valuable tool for rapid warning systems. Moreover, the digital twins derived for these two structures under Event 1 can successfully predict structural responses and damage under Events 2-3, which can be integrated with the incremental dynamic analysis (IDA) method to assess structural collapse and its financial risks. Furthermore, it enables multi-step IDA to evaluate earthquake series' impacts on structures. Overall, this thesis develops an efficient method for providing reliable information on earthquake-affected structures' current and future status during or immediately after an earthquake, considerably guaranteeing safety. Significant validation is implemented against both experimental and real data of RC structures, which thus clearly indicate the accurate predictive performance of this HLA-based method.

Images, eqnz.chch.2010

20130808_2293_1D3-40 New Brighton bridge Still awaiting a repair, but with so many bridges closed or partially closed we are lucky this one had what maybe minor damage. #4074