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Canterbury Public Library viewed from near the Bridge of Rememberance,
A view of the Medway Street footbridge through a safety fence that is blocking access to it. The bridge links Avonside Drive and River Road. It was damaged in the 4 September 2010 earthquake.
Removal of the earthquake damaged footbridge over the Avon at Medway Street. Tuesday 12 February 2013. File reference: CCL-2013 -02-12-untitled6.bmp From the collection of Christchurch City Libraries.
Removal of the earthquake damaged footbridge over the Avon at Medway Street. Tuesday 12 February 2013. File reference: CCL-2013 -02-12-untitled7.bmp From the collection of Christchurch City Libraries.
Removal of the earthquake damaged footbridge over the Avon at Medway Street. Tuesday 12 February 2013. File reference: CCL-2013 -02-12-untitled8.bmp From the collection of Christchurch City Libraries.
Removal of the earthquake damaged footbridge over the Avon at Medway Street. Tuesday 12 February 2013. File reference: CCL-2013 -02-12-untitled3.bmp From the collection of Christchurch City Libraries.
Removal of the earthquake damaged footbridge over the Avon at Medway Street. Tuesday 12 February 2013. File reference: CCL-2013 -02-12-untitled2.bmp From the collection of Christchurch City Libraries.
Removal of the earthquake damaged footbridge over the Avon at Medway Street. Tuesday 12 February 2013. File reference: CCL-2013 -02-12-untitled5.bmp From the collection of Christchurch City Libraries.
Removal of the earthquake damaged footbridge over the Avon at Medway Street. Tuesday 12 February 2013. File reference: CCL-2013 -02-12-untitled4.bmp From the collection of Christchurch City Libraries.
A car drives across the damaged Dallington bridge. The bridge has visibly moved relative to the road, leaving a large gap, which road cones have been placed in. The photographer comments, "Service pipes snapped as the land sank but the bridge remained".
A car drives across the damaged Dallington bridge. The bridge has visibly moved relative to the road, leaving a large gap, which road cones have been placed in. The photographer comments, "Service pipes snapped as the land sank but the bridge remained".
A man walks towards a damaged house in Dallington. The chimney has fallen, and roofing tiles have shaken loose. In the foreground, the railings of the damaged Dallington Bridge are visible.
People looking at the damage to Cashel mall from the cordon at the Bridge of Remembrance.
Damage to a building on Durham Street. Wire fencing has been placed around the building as a cordon.
A presentation prepared by one of the site engineers restoring the Memorial Arch and Bridge of Remembrance, outlining the damage to the structures, the repair designs and the construction methodologies.
A photograph of a damaged bridge. The photograph is captioned by BeckerFraserPhotos, "Askeaton Drive, Kaiapoi".
A photograph of a damaged bridge. The photograph is captioned by BeckerFraserPhotos, "Askeaton Drive, Kaiapoi".
A photograph of IHC Christchurch Earthquake Reflection Group member Rosanne Parrish looking at the damaged Medway Street Bridge.
A photograph of IHC Christchurch Earthquake Reflection Group member Rosanne Parrish looking at the damaged Medway Street Bridge.
A photograph of a detour sign on Ferry Road.
Photograph captioned by BeckerFraserPhotos, "A view looking south down Colombo Street from the bridge over the River Avon. The road damage in the foreground is where the bridge begins".
A damaged driveway bridge over Dudley Creek has been blocked off with warning tape. The sides of the bridge have slumped, and the driveway surface has buckled and cracked. In the background, the gates to the property are misaligned. The photographer comments, "The bridge to a large mansion on a huge section was displaced by half a metre".
A damaged driveway bridge over Dudley Creek has been blocked off with warning tape. The sides of the bridge have slumped, and the driveway surface has buckled and cracked. In the background, the gates to the property are misaligned. The photographer comments, "The bridge into the mansion in Banks Avenue is as broken as the mansion itself".
A damaged driveway bridge over Dudley Creek has been blocked off with warning tape. The sides of the bridge have slumped, and the driveway surface has buckled and cracked. In the background, the gates to the property are misaligned. The photographer comments, "The bridge to a large mansion on a huge section was displaced by half a metre".
A view down Cashel Street from the Bridge of Remembrance, showing earthquake damage to several buildings along Cashel Mall.
A view down Cashel Street from the Bridge of Remembrance, showing earthquake damage to several buildings along Cashel Mall.
The paper proposes a simple method for quick post-earthquake assessment of damage and condition of a stock of bridges in a transportation network using seismic data recorded by a strong motion array. The first part of the paper is concerned with using existing free field strong motion recorders to predict peak ground acceleration (PGA) at an arbitrary bridge site. Two methods are developed using artificial neural networks (a single network and a committee of neural networks) considering influential parameters, such as seismic magnitude, hypocentral depth and epicentral distance. The efficiency of the proposed method is explored using actual strong motion records from the devastating 2010 Darfield and 2011 Christchurch earthquakes in New Zealand. In the second part, two simple ideas are outlined how to infer the likely damage to a bridge using either the predicted PGA and seismic design spectrum, or a broader set of seismic metrics, structural parameters and damage indices.
A photograph looking south-west along Williams Street, from the Williams Street bridge, in Kaiapoi. In the distance is the rebuilt Blackwell's Department Store. The department store was rebuilt after the previous building was damaged in the 2010 and 2011 Canterbury earthquakes.
A damaged driveway bridge over a stream has visibly moved, scraping up some of the driveway. The photographer comments, "Our neighbour Pam Shadbolt's house, immediately behind our house, on the bank of Dudley Creek. The bridge has broken free from its foundations".
Detail of damage to the twisted Medway Street bridge. The photographer comments, "The twisted footbridge at the Medway St corner".