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

Gordon Campbell: On Last Night’s Debate, And The Collins Accusation

Debating is a peculiar discipline in that what you say is less important than how you’re saying it. Looking poised, being articulate and staying on topic generally wins the day – and on that score, Labour leader David Cunliffe won what turned out to be a bruising encounter with Prime Minister John Key last night on TVNZ.

Cunliffe marshalled his points better, kept Key off balance and – more often than not – was in control of the general tenor of the contest. Labour supporters would have been heartened, and given some belated reassurance that maybe the change of leadership last year had been the right decision. More>>

 

Parliament Today:

Gordon Campbell: On Winston Peters' Latest Bout Of Immigrant Bashing

It is only one poll, but rather than cannibalising each other's vote, Colin Craig and Winston Peters do seem to be managing to find the room to co-exist... Few are questioning how Peters got to this happy place, and what it says about the mood of the electorate. More>>

ALSO:

More Immigration News: First People Trafficking Charges

The first people trafficking charges in New Zealand have been brought by Immigration New Zealand (INZ)... The defendants have been charged under the Crimes Act 1961 for arranging by deception the entry of 18 Indian nationals into New Zealand. More>>

Collins 'Misinterprets Media Reports': "Too Compromised To Remain Justice Minister"

Bizarre claims by Judith Collins this morning that she had been cleared of inappropriate behaviour by the Privacy Commissioner demonstrates she is too compromised to remain Justice Minister, Labour MP Grant Robertson says. More>>

ALSO:

Labour On Climate Change: Focus On The Now For The Future

A Labour Government will put in place a comprehensive climate change strategy focusing on both mitigation and adaptation, establish an independent Climate Commission and implement carbon budgeting, says Labour Climate Change spokesperson Moana Mackey. More>>

ALSO:

Gordon Campbell: On National’s Housing Assistance Plan

So, as many as 90,000 people could derive some benefit from National’s housing assistance plans for low and middle-income earners... Yet in reality, the benefits seem likely to be insignificant, and they will be skewed towards those at the top end of the income group that’s supposedly the target. More>>

ALSO:

Election Data Consortium: National’s Worst Case Scenario At Stage One?

A month out from the general election and ipredict traders are still forecasting National’s vote to slip below current polling levels and there is potential for it to fall further. More>>

ALSO:

From The Scoop Video Archive: PM Says SIS "Told Me" About OIA Release

In a press conference immediately following an controversial OIA release of notes on an SIS briefing to then Labour leader Phil Goff, Key said "at that point [Tucker] told me he'd release it ...". Since the release of Nicky Hager's 'Dirty Politics' Key has denied being personally informed and said references by officials to 'the PM' being told briefed referred to his office. He now says the same about his own statement. More>>

ALSO:

  • Scoop Video in the news - New questions over Key claims | NZ Herald News - Stuff.co.nz
  • Earlier - Felix Marwick: Laying out facts over SIS documents - Newstalk ZB
  • Labour - Director’s letter contradicts Key’s claims
  • ACT - The Letter - 26 days to go
  • TV3 Video - Housing issue nudges Dirty Politics aside - David Cunliffe: Key's SIS explanation 'defies belief' - SIS leak came from Key's Office - Goff - Key 'categorically denies' Slater OIA discussion - Video: Key faces more Dirty Politics questions

  • TVNZ - Winston Peters: ‘Dirty Politics' is a new low
  • The Nation - Debate Between Grant Robertson And Russel Norman
  • NZ First - “The Words Mean What I Say They Mean”
  • Get More From Scoop

     

    LATEST HEADLINES

     
     
     
     
     
     
     
     
    Regional
    Search Scoop  
     
     
    Powered by Vodafone
    NZ independent news