Search

found 2588 results

Images for 2010-2011; more images...

Images, Canterbury Museum

One landscape colour digital photograph taken on 19 November 2011 showing part of the north side of London Street. The properties visible in the photograph are (from left to right) Tommy Changs Café, Canterbury Street, site of theatre erected for the Loons Circus Theatre Company production of Macbeth (being dismantled), Lyttel Arthouse (closed),...

Images, Canterbury Museum

One landscape colour digital photograph taken on 19 November 2011 showing buildings on London Street. Visible in the photograph (left to right) are Bells Pharmacy - relocated into a converted house with law firm MacTodd on the upper floor, Portico (gift shop), Tommy Changs Cafe, and the edge of the Lyttelton Petanque Club Gap Filler initiative. ...

Images, Canterbury Museum

One landscape colour digital photograph taken on 19 November 2011 showing the alleyway next to 29 London Street. These steps provided access to the Wunderbar and the Monsta Bar (closed). Visible to the left is the Lyttelton Coffee Company building being repaired. Prior earthquake strengthening enabled the Lyttelton Coffee Company to undertake w...

Images, Canterbury Museum

One landscape colour digital photograph taken on 19 November 2011 showing part of the north side of London Street. The properties visible from left to right are Lyttel Piko Organic and Wholefoods, and Satchmo Café Pizzabar The Lyttelton streetscape has changed dramatically from its pre-earthquake appearance and will continue to change as new bu...

Images, Canterbury Museum

One landscape colour digital photograph taken on 19 November 2011 showing part of the north side of London Street. The properties visible from left to right are: Himalaya Design (obscured), Coffee Culture (downstairs), J Voyce and Co Ships Providore (upstairs), empty shop, and Lyttel Piko Organic and Wholefoods The Lyttelton streetscape has cha...

Images, Canterbury Museum

One landscape colour digital photograph taken on 19 November 2011 showing part of the north side of London Street. The properties visible from left to right are: part of Lyttel Piko Organic and Wholefoods, Satchmo Café Pizzabar, Milly May and Snoclothes New Zealand. The empty section was formerly occupied by No. 6 Cafe. The Lyttelton streetsc...

Images, Canterbury Museum

One landscape colour digital photograph taken on 19 November 2011 looking east from Norwich Quay from approximately the base of Canterbury Street. Visible in the photograph are the partially deconstructed former Lyttelton Harbour Board Offices, the Holcim Cement Silos, the Oxford Street Railway Overbridge, Lyttelton Port of Christchurch's storag...

Images, Canterbury Museum

One portrait colour digital photograph taken on 19 November 2011 showing Shadbolt House prior to its demolition. Architect Lyttelton's tallest building before its demolition was built in 1961 as the offices of the Lyttelton Harbour Board. At the time it was demolished the building was known as Shadbolt House and was owned by Independent Fisherie...

Research papers, University of Canterbury Library

Liquefaction-induced lateral spreading in large seismic events often results in pervasive and costly damage to engineering structures and lifelines, making it a critical component of engineering design. However, the complex nature of this phenomenon leads to designing for such a hazard extremely challenging and there is a clear for an improved understanding and predicting liquefaction-induced lateral spreading. The 2010-2011 Canterbury (New Zealand) Earthquakes triggered severe liquefaction-induced lateral spreading along the streams and rivers of the Christchurch region, causing extensive damage to roads, bridges, lifelines, and structures in the vicinity. The unfortunate devastation induced from lateral spreading in these events also rendered the rare opportunity to gain an improved understanding of lateral spreading displacements specific to the Christchurch region. As part of this thesis, the method of ground surveying was employed following the 4 September 2010 Darfield (Mw 7.1) and 22 February 2011 Christchurch (Mw 6.2) earthquakes at 126 locations (19 repeated) throughout Christchurch and surrounding suburbs. The method involved measurements and then summation of crack widths along a specific alignment (transect) running approximately perpendicular to the waterway to indicate typically a maximum lateral displacement at the bank and reduction of the magnitude of displacements with distance from the river. Rigorous data processing and comparisons with alternative measurements of lateral spreading were performed to verify results from field observations and validate the method of ground surveying employed, as well as highlight the complex nature of lateral spreading displacements. The welldocumented field data was scrutinized to gain an understanding of typical magnitudes and distribution patterns (distribution of displacement with distance) of lateral spreading observed in the Christchurch area. Maximum displacements ranging from less than 10 cm to over 3.5 m were encountered at the sites surveyed and the area affected by spreading ranged from less than 20 m to over 200 m from the river. Despite the highly non-uniform displacements, four characteristic distribution patterns including large, distributed ground displacements, block-type movements, large and localized ground displacements, and areas of little to no displacements were identified. Available geotechnical, seismic, and topographic data were collated at the ground surveying sites for subsequent analysis of field measurements. Two widely-used empirical models (Zhang et al. (2004), Youd et al. (2002)) were scrutinized and applied to locations in the vicinity of field measurements for comparison with model predictions. The results indicated generally poor correlation (outside a factor of two) with empirical predictions at most locations and further validated the need for an improved, analysis- based method of predicting lateral displacements that considers the many factors involved on a site-specific basis. In addition, the development of appropriate model input parameters for the Youd et al. (2002) model led to a site-specific correlation of soil behavior type index, Ic, and fines content, FC, for sites along the Avon River in Christchurch that matched up well with existing Ic – FC relationships commonly used in current practice. Lastly, a rigorous analysis was performed for 25 selected locations of ground surveying measurements along the Avon River where ground slope conditions are mild (-1 to 2%) and channel heights range from about 2 – 4.5 m. The field data was divided into categories based on the observed distribution pattern of ground displacements including: large and distributed, moderate and distributed, small to negligible, and large and localized. A systematic approach was applied to determine potential critical layers contributing to the observed displacement patterns which led to the development of characteristic profiles for each category considered. The results of these analyses outline an alternative approach to the evaluation of lateral spreading in which a detailed geotechnical analysis is used to identify the potential for large spreading displacements and likely spatial distribution patterns of spreading. Key factors affecting the observed magnitude and distribution of spreading included the thickness of the critical layer, relative density, soil type and layer continuity. It was found that the large and distributed ground displacements were associated with a thick (1.5 – 2.5 m) deposit of loose, fine to silty sand (qc1 ~4-7 MPa, Ic 1.9-2.1, qc1n_cs ~50-70) that was continuous along the bank and with distance from the river. In contrast, small to negligible displacements were characterized by an absence of or relatively thin (< 1 m), discontinuous critical layer. Characteristic features of the moderate and distributed displacements were found to be somewhere between these two extremes. The localized and large displacements showed a characteristic critical layer similar to that observed in the large and distributed sites but that was not continuous and hence leading to the localized zone of displacement. The findings presented in this thesis illustrate the highly complex nature of lateral displacements that cannot be captured in simplified models but require a robust geotechnical analysis similar to that performed for this research.

Images, Alexander Turnbull Library

Photographs of central Christchurch after the 2010-2012 earthquakes taken 25 February 2012 by Sean McMahon. Locations are chiefly Manchester, Saint Asaph, Cashel, Columbo and Lichfield Streets, and the Bridge of Remembrance. Images show fencing around areas closed to the public, damaged and collapsed commercial buildings, cleared sites, re-opened Cashel Street area with shops and a cafe. Source of title - Title supplied by Library Quantity: 34 digital photograph(s).