An entry from Ruth Gardner's blog for 31 December 2011 entitled, "Awareness or Apprehension?".
An entry from Deborah Fitchett's blog for 5 March 2011, posted to Dreamwidth. The entry is titled, "In which she gets a new water system".The entry was downloaded on 17 April 2015.
An entry from Deborah Fitchett's blog for 5 March 2011, posted to Livejournal. The entry is titled, "In which she gets a new water system".The entry was downloaded on 14 April 2015.
Recent advances in timber design at the University of Canterbury have led to new structural systems that are appropriate for a wide range of building types, including multi-storey commercial office structures. These buildings are competitive with more traditional construction materials in terms of cost, sustainability and structural performance. This paper provides seismic design recommendations and analytical modelling approaches, appropriate for the seismic design of post-tensioned coupled timber wall systems. The models are based on existing seismic design theory for precast post-tensioned concrete, modified to more accurately account for elastic deformation of the timber wall systems and the influence of the floor system. Experimental test data from a two storey post-tensioned timber building, designed, constructed and tested at the University of Canterbury is used to validate the analytical models.
Currently there is a worldwide renaissance in timber building design. At the University of Canterbury, new structural systems for commercial multistorey timber buildings have been under development since 2005. These systems incorporate large timber sections connected by high strength post-tensioning tendons, and timber-concrete composite floor systems, and aim to compete with existing structural systems in terms of cost, constructability, operational and seismic performance. The development of post-tensioned timber systems has created a need for improved lateral force design approaches for timber buildings. Current code provisions for seismic design are based on the strength of the structure, and do not adequately account for its deformation. Because timber buildings are often governed by deflection, rather than strength, this can lead to the exceedence of design displacement limitations imposed by New Zealand codes. Therefore, accurate modeling approaches which define both the strength and deformation of post-tensioned timber buildings are required. Furthermore, experimental testing is required to verify the accuracy of these models. This thesis focuses on the development and experimental verification of modeling approaches for the lateral force design of post-tensioned timber frame and wall buildings. The experimentation consisted of uni-direcitonal and bi-directional quasi-static earthquake simulation on a two-thirds scale, two-storey post-tensioned timber frame and wall building with timber-concrete composite floors. The building was subjected to lateral drifts of up to 3% and demonstrated excellent seismic performance, exhibiting little damage. The building was instrumented and analyzed, providing data for the calibration of analytical and numerical models. Analytical and numerical models were developed for frame, wall and floor systems that account for significant deformation components. The models predicted the strength of the structural systems for a given design performance level. The static responses predicted by the models were compared with both experimental data and finite element models to evaluate their accuracy. The frame, wall and floor models were then incorporated into an existing lateral force design procedure known as displacement-based design and used to design several frame and wall structural systems. Predictions of key engineering demand parameters, such as displacement, drift, interstorey shear, interstorey moment and floor accelerations, were compared with the results of dynamic time-history analysis. It was concluded that the numerical and analytical models, presented in this thesis, are a sound basis for determining the lateral response of post-tensioned timber buildings. However, future research is required to further verify and improve these prediction models.
The national wool auction system is back in business after being knocked out of action by the Christchurch earthquake.
A fence has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A brick fence has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A wooden fence has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A store window that has been spray painted after it was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A window has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
Spray painted codes outside a block of apartments after it was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
Detail of spray painted codes left after a building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A fence has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
The entrance to a building has been spray painted after it has been cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
Spray painted codes outside a block of apartments after it had been cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
The side wall of a building has been spray painted after it was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A concrete-block fence has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A concrete-block fence has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A concrete-block fence has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A concrete-block fence has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
A concrete-block fence has been spray painted after the building was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
Detail of spray painted codes on a gate outside a house, left after it had been cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
The Asko Design store on Victoria Street has been given a yellow sticker. This was a building assessment system used following the February earthquake and indicates that this building has limited access and needs further evaluation.
The site of Gap Filler's "Film in the Gap!" project in Beckenham. An amplifier and a public address system was set up for performing musicians to use.
The entrance to the CMS House on Victoria Street has been spray painted after it was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
The window of Kum Pun Thai Restaurant on Victoria Street has been spray painted after it was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.
The Surreal Hair & Beauty store on Victoria Street has been given a yellow sticker. This was a building assessment system used following the February earthquake and indicates that this building has limited access and needs further evaluation.
The Surreal Hair & Beauty store on Victoria Street has been given a yellow sticker. This was a building assessment system used following the February earthquake and indicates that this building has limited access and needs further evaluation.
A man stands next to a garage spray painted with codes left after the property was cleared by a USAR team. This system was used following the February earthquake to mark buildings that have been checked.