A staff member cleaningup fallen jars and packets from the floor of Piko Wholefoods.
Second floor of the library, cleaned up and ready to use after the earthquake.
The recent earthquakes in Christchurch have made it clear that issues exist with current RC frame design in New Zealand. In particular, beam elongation in RC frame buildings was widespread and resulted in numerous buildings being rendered irreparable. Design solutions to overcome this problem are clearly needed, and the slotted beam is one such solution. This system has a distinct advantage over other damage avoidance design systems in that it can be constructed using current industry techniques and conventional reinforcing steel. As the name suggests, the slotted beam incorporates a vertical slot along part of the beam depth at the beam-column interface. Geometric beam elongation is accommodated via opening and closing of these slots during seismically induced rotations, while the top concrete hinge is heavily reinforced to prevent material inelastic elongation. Past research on slotted beams has shown that the bond demand on the bottom longitudinal reinforcement is increased compared with equivalent monolithic systems. Satisfying this increased bond demand through conventional means may yield impractical and economically less viable column dimensions. The same research also indicated that the joint shear mechanism was different to that observed within monolithic joints and that additional horizontal reinforcement was required as a result. Through a combination of theoretical investigation, forensic analysis, and database study, this research addresses the above issues and develops design guidelines. The use of supplementary vertical joint stirrups was investigated as a means of improving bond performance without the need for non-standard reinforcing steel or other hardware. These design guidelines were then validated experimentally with the testing of two 80% scale beam-column sub-assemblies. The revised provisions for bond within the bottom longitudinal reinforcement were found to be adequate while the top longitudinal reinforcement remained nominally elastic throughout both tests. An alternate mechanism was found to govern joint shear behaviour, removing the need for additional horizontal joint reinforcement. Current NZS3101:2006 joint shear reinforcement provisions were found to be more than adequate given the typically larger column depths required rendering the strut mechanism more effective. The test results were then used to further refine design recommendations for practicing engineers. Finally, conclusions and future research requirements were outlined.
A soft drink cup and napkins lie on the floor of an abandoned McDonalds.
The contents of shelves fallen on the floor in an office in the Registry Building.
Photograph captioned by BeckerFraserPhotos, "Ground floor column of the BDO building, Victoria Street".
Volunteers painting sheets of wood for the dance floor of Gap Filler's "Dance-O-Mat".
Volunteers painting sheets of wood for the dance floor of Gap Filler's "Dance-O-Mat".
Clothing litters the floor of Just Jeans in Cashel Mall, abandoned since 22 February 2011.
Volunteers painting sheets of wood for the dance floor of Gap Filler's "Dance-O-Mat".
Fallen files and equipment in an office on the fifth floor of the Registry building.
Fallen files and equipment in an office on the fifth floor of the Registry building.
Fallen files and equipment in an office on the fifth floor of the Registry building.
Photograph captioned by BeckerFraserPhotos, "Wendy's, Hereford Street. Reduced from six floors to one".
Fallen files and equipment in an office on the fifth floor of the Registry building.
Fallen files and equipment in an office on the fifth floor of the Registry building.
Fallen files and equipment in an office on the fifth floor of the Registry building.
Two monitors fallen flat and papers on the floor in an office in the Registry Building.
Members of the recovery team climbing the stairs on the first floor of the Registry Building.
A worker sawing insulation to fit into the floor of a classroom in the Oval Villlage.
Members of the recovery team climbing the stairs on the first floor of the Registry Building.
Workers laying tiles on the floor of the Undercroft, a new eating area under the library.
Workers laying insulation into the floor of one of the temporary classrooms in the Ilam Oval.
A photograph of the interior of a shop on Lichfield Street. Fallen stock litters the floor.
A photograph captioned by BeckerFraserPhotos, "Hotel Grand Chancellor. Structural damage on the ground floor".
Plaster, dust and offcuts of wood scattered on the floor of the Durham Street Methodist Church.
A volunteer painting sheets of wood for the dance floor of Gap Filler's "Dance-O-Mat".
A staff member cleaning up fallen jars and burst bags from the floor of Piko Wholefoods.
One landscape colour digital photograph taken on 19 May 2011 showing the partial demolition of the old Lyttelton Harbour Board Offices on the corner of Oxford Street and Norwich Quay. The photograph shows the upper floor of the original part of the building being removed and a temporary roof being constructed over the ground floor. At the time o...
Draw contents fallen on the floor along with the draw in an office in the Registry Building.