Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


World's first earthquake damage-resistant bridge testing

Canterbury carrying out the world's first earthquake damage-resistant bridge testing

April 28, 2014

University of Canterbury engineers are carrying out the world's first earthquake damage-resistant bridge testing on campus.

Half-scale fully pre-fabricated bridge support incorporating the state-of-the-art low damage seismic design and self-centring capability have been thoroughly tested at Canterbury’s civil and natural resources engineering laboratory.

Dr Alessandro Palermo says his research team has been testing New Zealand’s first concrete bridge that incorporates damage-resistant seismic technology along with self-centring capability. The bridge parts have been assembled and tested at the University of Canterbury. See: https://www.youtube.com/watch?v=QjdI7j8QLa0&feature=youtu.be.

``The bridge part is a fully prefabricated half-scale multi-column bridge support suitable for a typical New Zealand highway bridge. The specimen we are testing is three and a half metres high and about six metres long. It’s most likely the biggest bridge specimen ever tested not only on campus but in a New Zealand laboratory.

``Our bridge test specimen weighs more than 23 tonnes. It will be loaded with an additional 40 tonnes to simulate the weight of the bridge deck it will support. The testing is part of the ABC research project funded by the Natural Hazards Research Platform.

``Although a lot of research has been carried out in the United States and previously in Canterbury, this series of tests features innovative construction details which makes solutions not only structurally sound but also cost-effective.

``Prefabricating the whole bridge part in the factory means acceleration in the speed of construction and better quality control and it saves significant time in construction. The bridge parts are then transported to the construction site for assembly.

``Past experience from prefabrication of bridges in the United States shows only a few weeks or even days are needed to construct a bridge, compared to the traditional cast-in-place construction which can take several months or even years.

``Also changes to the connection to replace the fasteners after an earthquake means that bridges will not be closed for a long time for any repairs.

PhD candidate Mustafa Mashal, who has been heading this research part, says external fuses at the column connections will absorb seismic energy and thus, eliminate damage to concrete columns and the steel bars inside them. This will also protect the footings and cap beam from suffering any structural damage following a big earthquake.

Dr Palermo who is supervising the project says New Zealand had already started implementing the early technologies for self-centring bridges 40 years ago. The South Rangitīkei viaduct designed by Kiwi inventor and scientist Dr Ivan Skinner was the first self-centring bridge in the world.

Several organisations involved in the Christchurch rebuild including Opus and Stronger Christchurch Infrastructure Rebuild team (SCIRT) have been favourably impressed. Further testing will be carried out over the coming weeks.

``The Christchurch rebuild can be the real driver for using new seismic design technologies available from the UC bridge programme.

``We want to find technical solutions for bridges which are quick to construct and erect on the site; that are resistant to earthquakes and with higher material quality control and more importantly that are cost-competitive,’’ Dr Palermo says.

Ends

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Parliament Kicks Off: Carter Re-Elected Speaker

The 51st Parliament held its commission opening today with MPs sworn in and David Carter elected Speaker.

The day began at 11am with the three Royal Commissioners – the Chief Justice, the Court of Appeal President, and the Chief High Court Judge – declaring the new Parliament open.

After the Commissioners left the Chamber the swearing in of MPs took place in alphabetical order. Unlike some previous openings all MPs managed to swear on the bible or affirm their oath without any hiccups... More>>

 

Labour: Review Team Named, Leadership Campaign Starts

Labour’s New Zealand Council has appointed Bryan Gould as Convenor of its post-General Election Review. He will be joined on the Review Team by Hon Margaret Wilson, Stacey Morrison and Brian Corban.

ALSO:


Roy Morgan Poll: National Slips, Labour Hits Lows

The first New Zealand Roy Morgan Poll since the NZ Election shows National 43.5% (down 3.54% since the September 20 Election). This isn’t unusual, National support has dropped after each of John Key’s Election victories... However, support for the main opposition Labour Party has crashed to 22.5% (down 2.63% and the lowest support for Labour since the 1914 NZ Election as United Labour). More>>

ALSO:

In On First Round: New Zealand Wins Security Council Seat

Prime Minister John Key has welcomed New Zealand securing a place on the United Nations Security Council for the 2015-16 term. More>>

ALSO:

TPP Leak: Intellectual Property Text Confirms Risk - Jane Kelsey

The US is continuing its assault on generic medicines through numerous proposed changes to patent laws. ‘These are bound to impact on Pharmac if they are accepted’, according to Professor Kelsey... Copyright is another area of ongoing sensitivity... More>>

ALSO:

RMA: Smith Plans Reform To Ease Urban Development

Newly appointed Environment Minister Nick Smith has announced Resource Management Act reform to foster urban development, where high land prices and expensive resource consents are blocking efforts to provide affordable housing. More>>>

ALSO:

Gordon Campbell: On New Zealand getting involved (again) in other people's wars

Apparently, the Key government is still pondering how New Zealand will contribute to the fight against Islamic State. Long may it ponder, given the lack of consensus among our allies as to how to fight IS, where to fight it (Syria, Iraq, or both?) and with whose ground troops, pray tell? More>>

ALSO:

Gordon Campbell: On child poverty, and David Shearer’s latest outburst

The politicisation of (a) the public service and (b) the operations of the Official Information Act have been highlighted by the policy advice package on child poverty that RNZ’s resolute political editor Brent Edwards has finally prised out of the Ministry of Social Development. More>>

ALSO:

Gordon Campbell: On the government’s review of security laws

So the Key government is about to launch a four week review of the ability of our existing legislation to deal with “suspected and returning foreign terrorist fighters, and other violent extremists.”

According to its terms of reference, the review will consider whether the SIS, GCSB and Police are sufficiently able right now to (a) investigate and monitor suspected and returning foreign terrorist fighters… More>>

ALSO:

Labour Davids: Lisa Owen Interviews David Shearer

David Shearer still mulling whether to stand for Labour leadership but says his family doesn’t think it’s a good idea. Declares that it will be “incredibly divisive” for the Labour caucus if David Cunliffe returns to the role of leader. More>>

ALSO:

Taser Use & False Evidence: Timaru Officers "Failed To Follow Good Policing Practice"

The Authority found that even if Mr Reuben’s contact with the officer was deliberate it amounted to only a minor assault. While it found the use of the OC spray was justified, the use of the Taser was not a proportionate response... More>>

ALSO:

Little Surprise: Andrew Little To Contest Labour Leadership

I have decided to contest the Labour Party leadership. There are three immediate issues to deal with: creating greater cohesion across the caucus, rebuilding the relationship between caucus and the Party and, most importantly getting the process under way to listen to the voters who have abandoned us... More>>

ALSO:

Two Fewer Votes In Recount: "Positive Result" - Harawira

When I applied for a recount of the votes from the Tai Tokerau election, I made it clear that this application was not aimed at overturning the election result, but ensuring that all votes cast by Maori were treated with due respect, regardless of whether those votes are for Labour, Maori Party or MANA. More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news