Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search

 


UC Researching Seismic Design For Timber Buildings

UC Researching Seismic Design For Multi-storey Timber Buildings

June 24, 2013

A University of Canterbury (UC) research team is investigating a new type of design for multi-storey timber buildings to successfully withstand earthquakes.

UC researcher Andrew Dunbar says they are testing a combination of a low damage structural system with cross laminated timber.

``This is the first time in the world that anyone has done this. Cross laminated timber (CLT) panels are a new product to New Zealand, which started up at a Nelson factory last year,’’ Dunbar says.

``The panels are made like plywood with boards laid out in alternating directions. The difference is that CLT uses whole timber planks rather than thin veneers. Panels can be made from cheap low grade material to produce a quality structural material.

``In New Zealand and overseas multi-storey timber structures are becoming increasingly desirable for architects and building owners due to their aesthetic and environmental benefits.

``There is increasing public pressure to have low damage structural systems with minimal business interruption after a moderate to severe seismic event.

``The aim of our research is to combine a low damage structural system with CLT. We are being supervised by Professor Andy Buchanan and Associate Professor Stefano Pampanin.

``We are also using post-tensioned high strength steel tendons that clamp the CLT walls to the foundation. During an earthquake, the walls are allowed to rock and the high strength steel tendons act like rubber bands and snap the building back to its original position.

``This is the same concept that has been applied to the new Christchurch timber buildings in Victoria St, Birmingham Drive and the concrete Southern Cross Hospital Endoscopy building which was built before the earthquakes.’’

Dunbar says two test specimens are the feature of their research a low seismic option and a high seismic option. The low seismic option is aimed at the Auckland and Australian markets, replacing concrete tilt panels and shear cores.

The high seismic option is aimed for the Christchurch and Wellington areas providing a low damage system with replaceable energy dissipaters that act as ductile fuses.

The timber panels are much lighter than concrete providing smaller foundations meaning less expense.

``Our cross design system gives connections a much higher capacity than traditional timber using nails or bolts. This can be achieved at a comparable cost to concrete or steel while providing the added environmental and aesthetic benefits,’’ Dunbar says.

Final results of his research at UC’s Civil engineering and Natural Resources laboratory will be known at the end of the year. UC was recently ranked the 21st university in the world in terms of civil engineering and natural resources.

ENDS

© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Pre-Budget: Computer Emergency Response Team, Assemble!

John Key told the country's first ever Cyber Security Summit in Auckland that the government had earmarked funding set up a national Computer Emergency Response Team to help prevent and act on cyber incidents in partnership with the private sector and other organisations. More>>

ALSO:

Job Cutter Goes: Mark Weldon To Step Down As MediaWorks CEO

“When I joined MediaWorks in August 2014, I had a mandate to lead a significant change programme to bring the business back from receivership into a position where it could once again be a strong competitor in the market, with a sound and sustainable future. It was a big brief, laden with inherent challenges, but I took it in good faith and have dedicated myself fully to the goal since." More>>

ALSO:

Must Sell 20 Petrol Stations: Z Cleared To Buy Caltex Assets

Z Energy is allowed to buy the Caltex and Challenge! petrol station chains but must sell 19 of its retail sites and one truck-stop, the Commerce Commission has ruled in a split decision that acknowledges possible retail price coordination between fuel retailers occurs in some regions. More>>

ALSO:

Huntly: Genesis Extends Life Of Coal-Fuelled Power Station To 2022

Genesis Energy will keep its two coal and gas-fired units at Huntly Power Station operating until 2022, having previously said they'd be closed by 2018, after wringing a high price from other electricity generators who wanted to keep them as back-up. More>>

ALSO:

Dammed If You Do: Ruataniwha Irrigation Scheme Hits Farmer Uptake Targets

Enough Hawke's Bay farmers have signed up for water from the proposed Ruataniwha Water Storage Scheme for it to go ahead as long as a cornerstone institutional capital investor can be found to back it, its regional council promoter announced. More>>

ALSO:

Reserve Bank: OCR Stays At 2.25%

Reserve Bank governor Graeme Wheeler kept the official cash rate at 2.25 percent, in a decision traders had said could go either way, while predicting inflation will pick up as the slump in oil prices washes out of the data and capacity pressures start to build in the economy. More>>

ALSO:

Get More From Scoop

 
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news