Umut Akguzel Photograph 419

Images, UC QuakeStudies

A photograph of a crane and building rubble on a Tuam Street site, next to John Bull Cycles.

Umut Akguzel Photograph 418

Images, UC QuakeStudies

A photograph of the back of the badly-damaged John Bull Cycles building on the corner of Colombo Street and Tuam Street.

Umut Akguzel Photograph 417

Images, UC QuakeStudies

A photograph of the back of the badly-damaged John Bull Cycles building on the corner of Colombo Street and Tuam Street.

Umut Akguzel Photograph 416

Images, UC QuakeStudies

A close-up photograph of a broken window of the John Bull Cycles building on the corner of Colombo Street and Tuam Street.

Udder Photograph 1

Images, UC QuakeStudies

A photograph of a group of people examining Michael Parekowhai's bull sculptures. In the background is the street art installation 'Udder'.

Umut Akguzel Photograph 420

Images, UC QuakeStudies

A photograph of the badly-damaged John Bull Cycles building on the corner of Colombo Street and Tuam Street. Windows are broken and most of the bottom facade has been removed.

Umut Akguzel Photograph 421

Images, UC QuakeStudies

A photograph of the badly-damaged John Bull Cycles building on the corner of Colombo Street and Tuam Street. Windows are broken and most of the bottom facade has been removed.

Umut Akguzel Photograph 415

Images, UC QuakeStudies

A photograph of the badly-damaged John Bull Cycles building on the corner of Colombo Street and Tuam Street. Windows are broken and most of the bottom facade has been removed.

Umut Akguzel Photograph 413

Images, UC QuakeStudies

A photograph of the badly-damaged John Bull Cycles building on the corner of Colombo Street and Tuam Street. Most of the building's facade has fallen away and it has been cordoned off with wire fencing. Signs indicating that the business has relocated can be seen in the window.

Umut Akguzel Photograph 414

Images, UC QuakeStudies

A photograph of the badly-damaged John Bull Cycles building on the corner of Colombo Street and Tuam Street. Most of the building's facade has fallen away and it has been cordoned off with wire fencing. Signs indicating that the business has relocated can be seen in the window.

The effects of axial restraint in reinforced concrete coupling beams

Research papers, The University of Auckland Library

Axial elongation of reinforced concrete (RC) plastic hinges has previously been observed in a range of laboratory experiments, and more recently was observed in several Christchurch buildings following the 2010/2011 Canterbury earthquakes. Axial restraint to plastic hinges is provided by adjacent structural components such as floors as the plastic hinges elongate, which can significantly alter the performance of the plastic hinge and potentially invalidate the capacity design strength hierarchy of the building. Coupling beams in coupled wall systems are particularly susceptible to axial restraint effects due to their importance in the strength hierarchy, the high ductility demands that they experience, and the large stiffness of bounding walls. From computational modelling it has been found that ignoring axial restraint effects when designing coupled walls can result in significantly increased strength, reduced ductility and reduced energy dissipation capacity. The complexity of the topic merits further research to better account for realistic restraint effects when designing coupled walls.