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Videos, UC QuakeStudies

A video of a tour of the Christchurch central city Red Zone. The video includes footage of the site of the Brannigans Building on the corner of Oxford Terrace and Gloucester Street, the inside of the central library, Gloucester Street, Manchester Street, High Street, Poplar Lane, and Hereford Street.

Research papers, University of Canterbury Library

This paper summarizes the development of a high-resolution surficial shear wave velocity model based on the combination of the large high-spatial-density database of cone penetration test (CPT) logs in and around Christchurch, New Zealand and a recently-developed Christchurch-specific empirical correlation between soil shear wave velocity and CPT. This near-surface shear wave velocity model has applications for site characterization efforts via the development of maps of time-averaged shear wave velocities over specific depths, as well as use in site response analysis and ground motion simulation.

Videos, UC QuakeStudies

A video of a tour through the Christchurch central city Red Zone. The video includes footage of Colombo Street, ChristChurch Cathedral, Warners Hotel, the Hotel Grand Chancellor, Cashel Mall, the former Bus Exchange, Tuam Street, Manchester Street, the Mackenzie & Willis store, High Street, Plume, and The Globe café.

Videos, UC QuakeStudies

A video about a fire which broke out in an earthquake-damaged building on High Street. The video includes an interview with Steve Kennedy, Canterbury Fire Service Assistant Area Manager, Brigid Fayle, who worked in the building prior to the 22 February 2011 earthquake, and Anne MacKenzie, a structural engineer who worked on strengthening the building.

Videos, UC QuakeStudies

A video of a tour through the Christchurch central city Red Zone. The video includes footage of Manchester Street, Gloucester Street, Hereford Street, Lichfield Street, High Street, Worcester Street, and Cashel Mall. It also includes footage of Cathedral Square and the surrounding buildings, taken from the roof of the new Press Building on Gloucester Street.

Videos, UC QuakeStudies

A video of a tour of the Christchurch central city Red Zone. The video shows footage of the Edmond's Band Rotunda, Gloucester Street, the CTV building site, Poplar Lane, the McKenzie & Willis building, High Street, Lichfield Street, Colombo Street, Cathedral Square, and ChristChurch Cathedral.

Research papers, University of Canterbury Library

The lateral capacity of a conventional CLT shear wall is often governed by the strength and stiffness of its connections, which do not significantly utilize the in-plane strength of the CLT. Therefore, CLT shear walls are not yet being used efficiently in the construction of mass timber buildings due to a lack of research on high-capacity connections and alternative wall configurations. In this study, cyclic experiments were completed on six full-scale, 5-ply cantilever CLT shear walls with high-capacity hold-downs using mixed angle screws and bolts. All specimens exhibited significantly higher strength and stiffness than previously tested conventional CLT shear walls in the literature. The base connections demonstrated ductile failure modes through yielding of the hold-down connections. Based on the experimental results, numerical models were calibrated to investigate the seismic behaviour of CLT shear walls for prototype buildings of 3 and 6-storeys in Christchurch, NZ. As an alternative to cantilever (single) shear walls, a type of coupled wall with steel link beams between adjacent CLT wall piers was investigated. Effective coupling requires the link beam-to-wall connections to have adequate strength to ensure ductile link beam responses and adequate stiffness to yield the link beams at a relatively low inter-storey drift level. To this end, three beam-to-wall connection types were developed and cyclically tested to investigate their behaviour and feasibility. Based on the test results of the critical connection, a 3-storey, 2/3-scale coupled CLT wall specimen with three steel link beams and mixed angle screwed hold-downs was cyclically tested to evaluate its performance and experimentally validate the system concept. The test results showed a relatively high lateral strength compared to conventional CLT shear walls, as well as a high system ductility ratio of 7.6. Failure of the system was characterised by combined bending and withdrawal of the screws in the mixed angle screw hold-downs, yielding and eventual inelastic buckling of the steel link beams, CLT toe crushing, and local CLT delamination. Following the initial test, the steel link beams, mixed angle screw hold-downs, and damaged CLT regions were repaired, then the wall specimen was re-tested. The repaired wall behaved similarly to the original test and exhibited slightly higher energy dissipation and peak strength, but marginally more rapid strength deterioration under cyclic loading. Several hybrid coupled CLT shear walls were numerically modelled and calibrated based on the results of the coupled wall experiments. Pushover analyses were conducted on a series of configurations to validate a capacity design method for the system and to investigate reasonable parameter values for use in the preliminary design of the system. Additionally, an iterative seismic design method was proposed and used to design sample buildings of 6, 8, and 10-storeys using both nonlinear pushover and nonlinear time history analyses to verify the prototype designs. Results of the sample building analyses demonstrated adequate seismic behaviour and the proposed design parameters were found to be appropriate. In summary, high-capacity CLT shear walls can be used for the resistance of earthquakes by using stronger base connections and coupled wall configurations. The large-scale experimental testing in this study has demonstrated that both cantilever and coupled CLT shear walls are feasible LLRSs which can provide significantly greater lateral strength, stiffness, and energy dissipation than conventional CLT shear wall configurations.