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Images, eqnz.chch.2010

20100913_3424_1D3-400 Castle Rock The damage to Castle Rock, overlooking the Heathcote Valley from the 7.1 earthquake on September 4th. #385

Images, eqnz.chch.2010

Can't believe how much of this rock fell off! Its looks totally different - no longer a castle. Sad but very glad that the huge rock did not hit anything on the way down!

Images, Alexander Turnbull Library

The cartoon shows the name 'Christchurch' shaking so that bits fly off it; the letters 'H', 'I', and 'T' spelling 'hit' are the only ones not shaking. A second version has the words 'Rock'n Roll' as a title. Refers to the earthquake of 4th September 2010 and its hundreds of aftershocks which continue on now into November. Two versions of this cartoon are available Quantity: 1 digital cartoon(s).

Images, UC QuakeStudies

A digitally manipulated image of a poster advertising a performance in New Brighton by bands Mynor Star, Reflekshun and Loaded Victim. The photographer comments, "The Bar 25 had this night of rock on the 18 December 2011, but the earthquake on December 23 just off of the coast close by got it shut down".

Images, Alexander Turnbull Library

A cheerful old woman sits with a cup of tea on her sofa watching television with an enormous boulder beside her. She says 'Big and solid it reminded me of my late husband but then I realized that in two weeks it hasn't once broken wind, belched or called for a beer, or gone and changed the channel and I think I'm in love!' The little Evans man says 'Stone me!' Context - The Christchurch earthquake of 22 February 2011. Some people remain cheerful and optimistic in spite of dreadfully difficult conditions. Colour and black and white versions available Quantity: 2 digital cartoon(s).

Research papers, University of Canterbury Library

In recent years, rocking isolation has become an effective approach to improve seismic performance of steel and reinforced concrete structures. These systems can mitigate structural damage through rigid body displacement and thus relatively low requirements for structural ductility, which can significantly improve seismic resilience of structures and reduce repairing costs after strong earthquakes. A number of base rocking structural systems with only a single rocking interface have been proposed. However, these systems can have significant high mode effect for high rise structures due to the single rocking interface. This RObust BUilding SysTem (ROBUST) project is a collaborative China-New Zealand project sponsored by the International Joint Research Laboratory of Earthquake Engineering (ILEE), Tongji University, and a number of agencies and universities within New Zealand including the BRANZ, Comflor, Earthquake Commission, HERA, QuakeCoRE, QuakeCentre, University of Auckland, and the University of Canterbury. A number of structural configurations will be tested [1, 2], and non-structural elements including ceilings, infilling walls, glazed curtain walls, precast concrete panels, piping system will also be tested in this project [3]. Within this study, a multiple rocking column steel structural system was proposed and investigated mainly by Tongji team with assistance of NZ members. The concept of rocking column system initiates from the structure of Chinese ancient wooden pagoda. In some of Chinese wooden pagodas, there are continuous core columns hanged only at the top of each pagoda, which is not connected to each stories. This core column can effectively avoid collapse of the whole structure under large storey drifts. Likewise, there are also central continuous columns in the newly proposed steel rocking column system, which can avoid weak story failure mechanism and make story drifts more uniform. In the proposed rocking column system, the structure can switch between an elastic rigidly connected moment resisting frame and a controlled rocking column system when subjected to strong ground motion excitations. The main seismic energy can be dissipated by asymmetric friction beam–column connections, thereby effectively reducing residual displacement of the structure under seismic loading without causing excessive damage to structural members. Re–centering of the structure is provided not only by gravity load carried by rocking columns, but also by mould coil springs. To investigate dynamic properties of the proposed system under different levels of ground excitations, a full-scale threestory steel rocking column structural system with central continuous columns is to be tested using the International joint research Laboratory of Earthquake Engineering (ILEE) facilities, Shanghai, China and an analytical model is established. A finite element model is also developed using ABAQUS to simulate the structural dynamic responses. The rocking column system proposed in this paper is shown to produce resilient design with quick repair or replacement.