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Images, eqnz.chch.2010

Oxford Terrace Baptist Church on the corner of Madras St and Oxford Terrace, and alongside the Central City Fire Station on Kilmore St. The organ pipes have been saved and safely removed into safe keeping by the South Island Organ Company.

Research papers, The University of Auckland Library

The objective of the study presented herein is to assess three commonly used CPT-based liquefaction evaluation procedures and three liquefaction severity index frameworks using data from the 2010–2011 Canterbury earthquake sequence. Specifically, post-event field observations, ground motion recordings, and results from a recently completed extensive geotechnical site investigation programme at selected strong motion stations (SMSs) in the city of Christchurch and surrounding towns are used herein. Unlike similar studies that used data from free-field sites, accelerogram characteristics at the SMS locations can be used to assess the performance of liquefaction evaluation procedures prior to their use in the computation of surficial manifestation severity indices. Results from this study indicate that for cases with evidence of liquefaction triggering in the accelerograms, the majority of liquefaction evaluation procedures yielded correct predictions, regardless of whether surficial manifestation of liquefaction was evident or not. For cases with no evidence of liquefaction in the accelerograms (and no observed surficial evidence of liquefaction triggering), the majority of liquefaction evaluation procedures predicted liquefaction was triggered. When all cases are used to assess the performance of liquefaction severity index frameworks, a poor correlation is shown between the observed severity of liquefaction surface manifestation and the calculated severity indices. However, only using those cases where the liquefaction evaluation procedures yielded correct predictions, there is an improvement in the correlation, with the Liquefaction Severity Number (LSN) being the best performing of the frameworks investigated herein. However scatter in the relationship between the observed and calculated surficial manifestation still remains for all liquefaction severity index frameworks.

Research papers, University of Canterbury Library

he strong motion station at Heathcote Valley School (HVSC) recorded unusually high peak ground accelerations (2.21g vertical and 1.41g horizontal) during the February 2011 Christchurch earthquake. Ground motions recorded at HVSC in numerous other events also exhibited consistently higher intensities compared with nearby strong motion stations. We investigated the underlying causes of such high intensity ground motions at HVSC by means of 2D dynamic finite element analyses, using recorded ground motions during the 2010-2011 Canterbury earthquake sequence. The model takes advantage of a LiDAR-based digital elevation model (DEM) to account for the surface topography, while the geometry and dynamic properties of the surficial soils are characterized by seismic cone penetration tests (sCPT) and Multi-Channel Analyses of Surface Waves (MASW). Comparisons of simulated and recorded ground motions suggests that our model performs well for distant events, while for near-field events, ground motions recorded at the adopted reference station at Lyttelton Port are not reasonable input motions for the simulation. The simulations suggest that Rayleigh waves generated at the inclined interface of the surficial colluvium and underlying volcanic rock strongly affect the ground motions recorded at HVSC, in particular, being the dominant contributor to the recorded vertical motions.

Images, UC QuakeStudies

The old Railway Station clock tower on Moorhouse Avenue with plywood and steel reinforcement covering two sides, a crane hanging over top. The brickwork suffered extensive cracking during the earthquake making it in need for reinforcement. The clock has stopped at around 16:35, the time of the earthquake.

Images, Canterbury Museum

One landscape colour digital photograph taken on 25 February 2011 showing earthquake damage on Norwich Quay. The photograph is taken from approximately the intersection of Sutton and Norwich Quays looking east along Norwich Quay. The photograph also shows the eastern slope of Lyttelton and the damaged Timeball Station. Norwich Quay’s streetscap...

Images, UC QuakeStudies

The old Railway Station clock tower on Moorhouse Avenue with plywood and steel reinforcement covering two sides, and a crane hanging over top. The brickwork suffered extensive cracking during the earthquake making it in need of reinforcement. The clock has stopped at around 16:35, the time of the earthquake.

Images, UC QuakeStudies

The old Railway Station clock tower on Moorhouse Avenue with plywood and steel reinforcement covering two sides, and a crane hanging over top. The brickwork suffered extensive cracking during the earthquake making it in need of reinforcement. The clock has stopped at around 16:35, the time of the earthquake.

Images, UC QuakeStudies

A photograph of three petrol pumps at a BP station. One of the pumps has been covered by a piece of paper with a sticker reading, "out". Underneath the sticker, the paper reads, "Available - diesel only. Due to high demand (following the Canterbury Earthquake) we are currently out of petrol".

Images, UC QuakeStudies

A photograph of Ray Whelan and Mark Osborne, from the Wellington Emergency Management Office, standing at a registration station in Cowles Stadium. The stadium was set up as a Civil Defence Report Centre after the 4 September 2010 earthquake. In the background, members of the Red Cross can be seen.

Images, Canterbury Museum

One white over-painted hand-made electric guitar made primarily from ash and maple timbers, also incorporating wood from a variety of historic buildings in Canterbury damaged or destroyed in the 2010 - 2011 earthquakes including the Arts Centre, Kutwell’s Warehouse, Lyttleton main street pub, Timeball Station, Carlton Hotel, Merivale shops, bui...

Research papers, University of Canterbury Library

In this paper, we perform hybrid broadband (0-10 Hz) ground motion simulations for the ten most significant events (Mw 4.7-7.1) in the 2010-2011 Canterbury earthquake sequence. Taking advantage of having repeated recordings at same stations, we validate our simulations using both recordings and an empirically-developed ground motion prediction equation (GMPE). The simulation clearly captures the sedimentary basin amplification and the rupture directivity effects. Quantitative comparisons of the simulations with both recordings and the GMPE, as well as analyses of the total residuals (indicating model bias) show that simulations perform better than the empirical GMPE, especially for long period. To scrutinize the ground motion variability, we partitioned the total residuals into different components. The total residual appears to be unbiased, and the use of a 3D velocity structure reduces the long period systematic bias particularly for stations located close to the Banks Peninsula volcanic area.

Images, Canterbury Museum

One landscape colour digital photograph taken on 26 May 2013 of London Street, Lyttelton. The photograph was taken from St Davids Street looking west. The roofs of the portable buildings forming the temporary Lyttelton Police station are visible in the foreground. The Lyttelton Port Company offices and Tunnel Portal are prominent in the midgrou...

Images, eqnz.chch.2010

The old Christchurch Railway Station Clock Tower was damaged during the 7.1 magnitude quake on 4 September 2010 and was braced by the wooden sleeve until repaired. However, although the sleeve did its job during the 6.3 magnitude quake on 22 February 2011, the lower part of the tower started to break away.

Images, UC QuakeStudies

An access point into the CBD cordon at the corner of Gloucester and Oxford Terrace. Road cones and fencing can be seen in the background with a sign saying 'Access point. Hours of operation 6am-7pm daily. Outside this house use Manchester St/Cambridge Terrace access point'. Inside the cordon, a station can be seen on the left, as well as some workers and cars. The demolition site at the back is where the Brannigans Building used to be.