New Zealand’s biggest bridge testing at UC

Published: Wed 14 Aug 2013 03:35 PM
New Zealand’s biggest bridge testing at UC
August 14, 2013
New Zealand’s biggest testing of a concrete bridge will take place at the University of Canterbury (UC) over the next two days.
The bridge part is a fully prefabricated half-scale multi-column bridge support for a typical 30 metre long New Zealand highway bridge.
Dr Alessandro Palermo says building of bridges since the 2010 and 2011 earthquakes have changed significantly.  The rebuild of Christchurch will involve huge labour and big construction companies like Fletcher and Fulton Hogan who are starting embrace new methods based on accelerating bridge construction (ABC).
Prefabrication of bridge elements are now being made in an off-site factory. The bridge parts are transported to the construction site for the assembly.
This allows the bridge to be constructed within a few weeks or even days, compared to the traditional cast-in-place construction which can take several months.
``Prefabrication also provides advantages such as minimised traffic disruption, rapid construction, improved safety on the work site, higher quality control of the materials, higher durability, lower life-cycle costs and a reduced environmental impact.
``Prefabricated bridges have been used in areas of low seismicity since the 1990s, in countries such as the USA and Taiwan. In the USA, prefabrication of bridges has become common and in some states, such as Texas, prefabrication is now the preferred construction method for highway bridges.
``Prefabricated bridges are not yet in use extensively in areas of high seismicity due to uncertainty of the seismic performance.
``The specimen to be tested at Canterbury weighs more than 22 tonnes. It will be loaded with an additional 60 tonnes to simulate the weight of the bridge deck it will support.
``The specimen will then be pushed to failure point in order to assess its seismic performance for extreme earthquake events. The test will be a world-first at an international level as the concept was only proposed in 2011 by the National Co-operative Highway Research Programme in the USA but has not been tested at this scale with multiple columns.’’
The testing today is part of the ABC research project funded by the Natural Hazards Research Platform and supervised by Dr Palermo. A UC engineering student, Mustafa Mashal, is doing his PhD on the project and is in charge of testing.
Left to right  Dr Alessandro Palermo, Sam White and Mustafa Mashal at the UC bridge testing site

Next in Business, Science, and Tech

Tiwai Deal Gives Time For Managed Transition
By: New Zealand Government
Reserve Bank Responding To Illegal Breach Of Data System
By: The Reserve Bank of New Zealand
New Zealanders Have Their Hopes Up For 2021
By: Horizon Research Limited
Data Use Soars Over New Year’s Eve As Kiwis Stay Connected Digitally
By: Vodafone NZ
Lack Of Competitive Pressure Leads To An Undesirable Trading Situation
By: Electricity Authority
SEEK NZ Employment Report - Strong Job Ad Performance In Quarter Four, Job Ads Up 19% On Quarter Three
2020: New Zealand’s 7th-warmest Year On Record
Property Market Set To Cool From Sizzling To Warm In 2021
By: Quotable Value New Zealand
PriceSpy Research Reveals How Shopping Behaviours Have Changed This Christmas
By: PriceSpy
Noel Leeming Group Warned For Making Delivery Representations Without Reasonable Grounds During COVID-19 Lockdown
By: Commerce Commission
Gordon Campbell On The Excessive Secrecy Surrounding Cyber Hacks, And Some Lost Soul Legends
By: Gordon Campbell
Reserve Bank cyber attack: Third party involved can provide clues on info exposed - expert
Digital Christmas: Online Traffic Spikes As Kiwis Connect With Friends And Whānau Online
By: Vodafone
Greens: Electricity Market Reforms Needed
By: Green Party
Calls For Tough Penalty For Meridian After Watchdog Finding
By: Flick Electric
View as: DESKTOP | MOBILE © Scoop Media