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

Perfectly-Timed Anniversaries:
Suffrage Day Is Last Chance To Enrol

If you’re not enrolled now, you need to hurry or you won’t be able to vote in this Saturday’s general election.

“Election day is almost here, and it’s your last chance to enrol,” says Murray Wicks, National Manager, Enrolment Services. “It’s not too late, but you need to do it right now.”

“The last chance to enrol is Friday 19 September. You can’t enrol on election day.” More>>

 

Parliament Today:

Gordon Campbell: On First Time Voting (Greens)

For the last two days, I’ve turned my column over to a couple of guest columnists who are first time voters… Today’s guest columnist is Ana Avia-O’Connor, who will be casting her first time vote on Saturday for the Greens. More>>

ALSO:

Big March: Call For An End To Domestic Violence

Hundreds of protesters marched down Lambton Quay to Parliament Monday calling for an end to domestic violence. Wearing white facemasks, waving banners and calling for “safety” for the women and children of New Zealand.. More>>

ALSO:

Meddling: Aussie Liberals Embroiled In Key Campaign

John Key needs to explain why Australia’s Liberal Party is interfering in New Zealand domestic politics and is encouraging Kiwi voters across the ditch to vote for National just days out from the election, Labour’s campaign spokesperson Annette King says. More>>

ALSO:

SURVEILLANCE:

Election Ad Soundtrack: Rapper Eminem Sues National Party Over Copyright Breach

US rapper Eminem is suing the New Zealand National Party for alleged copyright infringement over unauthorised use of the rapper’s ‘Lose Yourself’ song in an election campaign advertisement. More>>

ALSO:

Pre-Election Chartering: Four New Partnership Schools To Open

Education Minister Hekia Parata today announced the Government has signed contracts to open four new Partnership Schools in 2015. More>>

ALSO:

Werewolf 50 Out Now - The Election Issue: Loss Leaders

Gordon Campbell: A third term requires a mature decision, with eyes wide open. It calls for a conscious vote of confidence… Without trying hard here are about 19 reasons, in no particular order, for not ticking ‘party vote’ National. More>>

ALSO:

Not-Especially New Plans: All Prisons To Become Working Prisons Under National

All public prisons in New Zealand will become full working prisons by 2017, and ex-prisoners will receive post-release drug addiction treatment if National is returned to government, says Corrections Spokesperson Anne Tolley. More>>

ALSO:

Māngere: "False Claim Of Matai Title" - Labour

National must explain why its candidate for Māngere Misa Fia Turner appears to be using a Matai title she is not entitled to, Labour’s MP for Māngere and Pacific Islands Affairs spokesperson Su’a William Sio says. A Matai title is a legally-recognised ... More>>

ALSO:

CPAG Report: No New Zealand Child Should Grow Up In Poverty

Child Poverty Action Group's flagship policy publication Our Children, Our Choice: Priorities for Policy calls for cross party political agreement to underpin an action plan to eliminate child poverty in New Zealand. More>>

ALSO:

Gordon Campbell:
On National’s Phantom Tax Cut Package

Hmmm. So National’s tax cuts package turns out to be one of those television advertisements that screams a headline promise – perfect skin! a youth tonic that works! – while in very small print there’s an out clause: special conditions may apply. More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news