Cracks in the brickwork around one of the windows of the Cathedral of the Blessed Sacrament on Barbadoes Street.
Photograph captioned by Fairfax, "Earthquake in Christchurch. A girl sits in a crack in the road near Avonside Drive".
The damaged Cathedral of the Blessed Sacrament, seen from the north side. Large cracks are visible below the dome.
Photo taken Jan 2011 - the cracks in the front of the building get a little bigger with each aftershock.
MPs are pledging not to let politics get in the way of helping rebuild earthquake-devastated Christchurch.
During the 2010/2011 Canterbury earthquakes, several reinforced concrete (RC) walls in multi-storey buildings formed a single crack in the plastic hinge region as opposed to distributed cracking. In several cases the crack width that was required to accommodate the inelastic displacement of the building resulted in fracture of the vertical reinforcing steel. This type of failure is characteristic of RC members with low reinforcement contents, where the area of reinforcing steel is insufficient to develop the tension force required to form secondary cracks in the surrounding concrete. The minimum vertical reinforcement in RC walls was increased in NZS 3101:2006 with the equation for the minimum vertical reinforcement in beams also adopted for walls, despite differences in reinforcement arrangement and loading. A series of moment-curvature analyses were conducted for an example RC wall based on the Gallery Apartments building in Christchurch. The analysis results indicated that even when the NZS 3101:2006 minimum vertical reinforcement limit was satisfied for a known concrete strength, the wall was still susceptible to sudden failure unless a significant axial load was applied. Additionally, current equations for minimum reinforcement based on a sectional analysis approach do not adequately address the issues related to crack control and distribution of inelastic deformations in ductile walls.
A photograph of the earthquake damage to the corner of Woodham Road and Avonside Drive. There are large cracks in the road, and flooding and liquefaction. Wire fencing and road cones have been placed around parts of the road that are unsafe. Two signs reading, "Road closed" and, "No entry" can be seen at the entrance to Avonside Drive.
A photograph of the earthquake damage to the Kenton Chambers Building on Hereford Street. Large cracks have formed in the columns between the building's windows. A section of the bottom storey has collapsed and the bricks have spilled onto the footpath in front. Steel fences have been placed on the street as a cordon. In the distance there are many other earthquake-damaged buildings.
The line that runs across this picture is the subsidence line - everything this side of the line has sunk by about 50 cm.
A worker grinding off the peaks left by the gel injected into the cracks in the James Hight Library walls.
A worker grinding off the peaks left by the gel injected into the cracks in the James Hight Library walls.
A worker grinding off the peaks left by the gel injected into the cracks in the James Hight Library walls.
Photograph captioned by Fairfax, "Sam Bowen (9) and Emmaleigh Bowen (4) play in a crack on Raven Quay in Kaiapoi".
A worker grinding off the peaks left by the gel injected into the cracks in the James Hight Library walls.
Damage to the Kenton Chambers building. Diagonal cracking between the windows shows that the building has suffered major structural damage.
Cracks in the path of a residential property on Hood Avenue in Pines Beach after the September 4th earthquake.
The damaged Excelsior Hotel. Parts of the brick facade has collapsed, and there are large cracks running through what remains.
Large cracks in Avonside Drive, where the road has slumped towards the river. The photographer comments, "Swanns Rd bridge, Avonside".
A man inspects a large crack in a footpath beside the river, where the land has slumped towards the water.
Cracks in the driveway of a residential property on Hood Avenue in Pines Beach after the September 4th earthquake.
Damaged building and the back of Argosy House, seen from behind cordon fencing. Cracks down the walls are clearly visible.
A damaged and abandoned house at 10 Seabreeze Close in Bexley. Weeds are growing through the cracks in the ground.
Cracks in the plaster of the wall of the reception area of the English department at the University of Canterbury.
Photograph captioned by BeckerFraserPhotos, "Extensive slumping and cracking near where Horseshoe Lake joins up with the Avon River".
Dirty water filling a gutter on Bracken Street in Avonside. Weeds can be seen growing in cracks in the pavement.
Cracking along the bottom of a house in Avonside Drive. The house has lifted a few centimetres off its foundations.
Damage to the Kenton Chambers building. Diagonal cracking between the windows shows that the building has suffered major structural damage.
A worker grinding off the peaks left by the gel injected into the cracks in the James Hight Library walls.
A worker grinding off the peaks left by the gel injected into the cracks in the James Hight Library walls.
Damage to two adjoining apartments that have been cordoned off from the public. Cracks are clearly visible on the walls.