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

 

Cosmetics & Pollution: Proposal To Ban Microbeads

Cosmetic products containing microbeads will be banned under a proposal announced by the Minister for the Environment today. Marine scientists have been advocating for a ban on the microplastics, which have been found to quickly enter waterways and harm marine life. More>>

ALSO:

NIWA: 2016 New Zealand’s Warmest Year On Record

Annual temperatures were above average (0.51°C to 1.20°C above the annual average) throughout the country, with very few locations observing near average temperatures (within 0.5°C of the annual average) or lower. The year 2016 was the warmest on record for New Zealand, based on NIWA’s seven-station series which begins in 1909. More>>

ALSO:

Farewell 2016: NZ Economy Flies Through 2016's Political Curveballs

Dec. 23 (BusinessDesk) - New Zealand's economy batted away some curly political curveballs of 2016 to end the year on a high note, with its twin planks of a booming construction sector and rampant tourism soon to be joined by a resurgent dairy industry. More>>

ALSO:


NZ Economy: More Growth Than Expected In 3rd Qtr

Dec. 22 (BusinessDesk) - New Zealand's economy grew at a faster pace than expected in the September quarter as a booming construction sector continued to underpin activity, spilling over into related building services, and was bolstered by tourism and transport ... More>>

  • NZ Govt - Solid growth for NZ despite fragile world economy
  • NZ Council of Trade Unions - Government needs to ensure economy raises living standards
  • KiwiRail Goes Deisel: Cans electric trains on partially electrified North Island trunkline

    Dec. 21 (BusinessDesk) – KiwiRail, the state-owned rail and freight operator, said a small fleet of electric trains on New Zealand’s North Island would be phased out over the next two years and replaced with diesel locomotives. More>>

  • KiwiRail - KiwiRail announces fleet decision on North Island line
  • Greens - Ditching electric trains massive step backwards
  • Labour - Bill English turns ‘Think Big’ into ‘Think Backwards’
  • First Union - Train drivers condemn KiwiRail’s return to “dirty diesel”
  • NZ First - KiwiRail Going Backwards for Xmas
  • NIWA: The Year's Top Science Findings

    Since 1972 NIWA has operated a Clean Air Monitoring Station at Baring Head, near Wellington... In June, Baring Head’s carbon dioxide readings officially passed 400 parts per million (ppm), a level last reached more than three million years ago. More>>

    ALSO:

    Get More From Scoop

     
     
     
     
     
     
     
     
    Sci-Tech
    Search Scoop  
     
     
    Powered by Vodafone
    NZ independent news