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Research papers, The University of Auckland Library

Industrial steel storage pallet racking systems are used extensively worldwide to store goods. Forty percent of all goods are stored on storage racks at some time during their manufactureto- consumption life. In 2017, goods worth USD 16.5 billion were carried on cold-formed steel racking systems in seismically active regions worldwide. Historically, these racks are particularly vulnerable to collapse in severe earthquakes. In the 2010/2011 Christchurch earthquakes, around NZD 100 million of pallet racking stored goods were lost, with much greater associated economic losses due to disruptions to the national supply chain. A novel component, the friction slipper baseplate, has been designed and developed to very significantly improve the seismic performance of a selective pallet racking system in both the cross-aisle and the down-aisle directions. This thesis documents the whole progress of the development of the friction slipper baseplate from the design concept development to experimental verification and incorporation into the seismic design procedure for selective pallet racking systems. The test results on the component joint tests, full-scale pull-over and snap-back tests and fullscale shaking table tests of a steel storage racking system are presented. The extensive experimental observations show that the friction slipper baseplate exhibits the best seismic performance in both the cross-aisle and the down-aisle directions compared with all the other base-connections tested. It protects the rack frame and concrete floor from damage, reduces the risk of overturning in the cross-aisle direction, and minimises the damage at beam-end connectors in the down-aisle direction, without sustaining damage to the connection itself. Moreover, this high level of seismic performance can be delivered by a simple and costeffective baseplate with almost no additional cost. The significantly reduced internal force and frame acceleration response enable the more cost-effective and safer design of the pallet racking system with minimal extra cost for the baseplate. The friction slipper baseplate also provides enhanced protection to the column base from operational impact damage compared with other seismic resisting and standard baseplates.

Images, UC QuakeStudies

A photograph of the 'Arcades Project' on the corner of Kilmore and Durham Streets. The public sculpture was a collaboration between FESTA, Andrew Just, Ryan Reynolds and Life in Vacant Spaces.

Images, UC QuakeStudies

A photograph submitted by Anonymous to the QuakeStories website. The description reads, "Chaos at work – that pallet of boxes was stacked on top pf the other one, got thrown completely clear; Feb 22nd.".

Images, UC QuakeStudies

A snapshot from GPS Boomerang's SmartBird flight over the Christchurch red zone on 23 December 2012, looking over Durham Street with Gap Filler's Pallet Pavilion to the left, on the site of the Crowne Plaza Hotel.

Images, UC QuakeStudies

Hand-written signs on the fence opposite the Gap Filler Pallet Pavillion advertise events at the pavillion. One advertises a plant sale on Saturday 22 December, the other high teas and cakes on Sunday 23 December.

Images, UC QuakeStudies

A snapshot from GPS Boomerang's SmartBird flight over the Christchurch red zone on 23 December 2012, looking over the Town Hall and Victoria Square with the site of the Crowne Plaza Hotel visible in the bottom left, GapFiller's Pallet Pavillion now in the space.

Images, UC QuakeStudies

A photograph of Helen Campbell and Jonathan Hall transfering Crack'd for Christchurch's ottoman artwork from Campbell's garage to a trailer.Crack'd for Christchurch comments, "Helen Campbell and Jonathan Hall getting Otto ready for his trip to meet Flora at their final destination."