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Images for plastic; more images...

Images, Canterbury Museum

A pink and a purple artificial fabric flowers with plastic stems and fabric leaves tied together with pink metallic string. The purple flower has additional plastic leaves with white bead like additions.

Images, UC QuakeStudies

A photograph of Siobhan Murphy's house at 436 Oxford Terrace. The front walls has been covered with plastic sheeting. A bow made out of curtains has been pinned to the plastic where the fireplace juts out from the wall. The photographer comments, "The bow is a memorial to Murphy's living room and her life in the house".

Images, UC QuakeStudies

A photograph of Siobhan Murphy's house at 436 Oxford Terrace. The front walls has been covered with plastic sheeting. A bow made out of curtains has been pinned to the plastic where the fireplace juts out from the wall. The photographer comments, "The bow is a memorial to Murphy's living room and her life in the house".

Images, UC QuakeStudies

A photograph of Siobhan Murphy outside her house at 436 Oxford Terrace. The front walls of the house have been covered with plastic sheeting. A bow made out of curtains has been pinned to the plastic where the fireplace juts out of the closest wall. The photographer comments, "The bow is a memorial to Murphy's living room and her life in the house".

Images, UC QuakeStudies

A photograph of a room in the Diabetes Centre which has been prepared for repairs. The moveable stacks and counter have been covered in plastic sheeting and a tarpaulin has been draped over the carpet.

Images, Canterbury Museum

Two pink and two purple artificial fabric roses with plastic stems and fabric leaves tied together with a red fabric heart on a wooden stick using purple metallic string. The pink flower has additional plastic leaves with white bead like additions.

Images, Canterbury Museum

Two pink and two purple artificial fabric roses with plastic stems and fabric leaves tied together with a red fabric heart on a wooden stick using pink metallic string. The flowers have additional plastic leaves with white bead like additions.

Research papers, The University of Auckland Library

Reinforced concrete buildings that satisfied modern seismic design criteria generally behaved as expected during the recent Canterbury and Kaikoura earthquakes in New Zealand, forming plastic hinges in intended locations. While this meant that life-safety performance objectives were met, widespread demolition and heavy economic losses took place in the aftermath of the earthquakes.The Christchurch central business district was particularly hard hit, with over 60% of the multistorey reinforced concrete buildings being demolished. A lack of knowledge on the post-earthquake residual capacity of reinforced concrete buildings was a contributing factor to the mass demolition.Many aspects related to the assessment of earthquake-damaged reinforced concrete buildings require further research. This thesis focusses on improving the state of knowledge on the post earthquakeresidual capacity and reparability of moderately damaged plastic hinges, with an emphasis on plastic hinges typical of modern moment frame structures. The repair method focussed on is epoxy injection of cracks and patching of spalled concrete. A targeted test program on seventeen nominally identical large-scale ductile reinforced concrete beams, three of which were repaired by epoxy injection following initial damaging loadings, was conducted to support these objectives. Test variables included the loading protocol, the loading rate, and the level of restraint to axial elongation.The information that can be gleaned from post-earthquake damage surveys is investigated. It is shown that residual crack widths are dependent on residual deformations, and are not necessarily indicative of the maximum rotation demands or the plastic hinge residual capacity. The implications of various other types of damage typical of beam and column plastic hinges are also discussed.Experimental data are used to demonstrate that the strength and deformation capacity of plastic hinges with modern seismic detailing are often unreduced as a result of moderate earthquake induced damage, albeit with certain exceptions. Special attention is given to the effects of prior yielding of the longitudinal reinforcement, accounting for the low-cycle fatigue and strain ageing phenomena. A material-level testing program on the low-cycle fatigue behaviour of grade 300E reinforcing steel was conducted to supplement the data available in the literature.A reduction in stiffness, relative to the initial secant stiffness to yield, occurs due to moderate plastic hinging damage. This reduction in stiffness is shown to be correlated with the ductility demand,and a proposed model gives a conservative lower-bound estimate of the residual stiffness following an arbitrary earthquake-type loading. Repair by epoxy injection is shown to be effective in restoring the majority of stiffness to plastic hinges in beams. Epoxy injection is also shown to have implications for the residual strength and elongation characteristics of repaired plastic hinges.