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Testing of Princess River Bridge

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McGee, Rodney William (1997) Testing of Princess River Bridge. Research Master thesis, University of Tasmania.

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Abstract

Princess River Bridge was a two span reinforced concrete T-beam bridge located on the Lyell
Highway on Tasmania's west coast. It was inundated in 1991 by the King River Hydro
Electric Power Development.
A program of testing was undertaken prior to inundation to assist with the understanding of
bridge performance and the overall management of the State's bridge asset The range of
testing included dimensional, cracking and cover surveys, concrete and steel testing,
dynamic response, load distribution, deck punching shear behaviour and ultimate capacity.
While bridge dimensions were generally within tolerance, 48% of measurements of cover to
reinforcement were outside the range permitted in the current Australian Standard. The
variability of cover is however consistent with that reported for bridges in the Sydney area
and for other Tasmanian bridges.
Little flexural cracking was evident in the beams prior to testing. There was however a
significant amount of random cracking in the deck soffit, which is likely to have been
attributable to the permeability of the timber formwork and consequent implications for
curing.
Concrete testing showed high strength due to relatively high cement contents. Concrete
quality and the high relative humidities at the site would have contributed to the minimal
carbonation. Steel tensile strength of 300 MPa was higher than the anticipated 230 to 250
MPa.
Measurements of dynamic response were able to discern the removal of sections of railing,
but required substantial damage to beam reinforcement before observable changes in
response occurred.
There was reasonable correlation between calculated and measured load distributions,
although strains were underestimated.
Loading of the deck showed substantial capacity in punching shear. The load at which the
bridge yielded was reasonably well predicted, and the bridge failed in a ductile manner.

Item Type: Thesis (Research Master)
Keywords: Princess River Bridge (Queenstown Region, Tas.)
Copyright Holders: The Author
Copyright Information:

Copyright 1997 the Author - The University is continuing to endeavour to trace the copyright
owner(s) and in the meantime this item has been reproduced here in good faith. We
would be pleased to hear from the copyright owner(s).

Additional Information:

Thesis (M.Eng.)--University of Tasmania, 1997. Includes bibliographical references

Date Deposited: 19 Dec 2014 02:37
Last Modified: 25 Sep 2017 07:01
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