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Testing of Pre-Tensioned Bolts for Bridge Decks Joints
The paper summarizes laboratory tests carried out by RTA Bridge Engineering to investigate different factors affecting the reliability of bolted connections for bridge deck expansion joints. The test rig comprised steel plates bolted to a large…
Impact of Sudden Failure of Cables on the Dynamic Performance of a Cable-stayed Bridge
In cable stayed bridges corrosion and fatigue as well as extreme loadings such as earthquake, lightning strike and blast may lead to loss of cables. The vulnerability of cable stayed bridges for such cable loss scenarios has not been thoroughly…
Conservation and Upgrade of Historic Wrought Iron Bridges in NSW
Between 1871 and 1893, 27 wrought iron lattice truss road bridges were built in NSW. Of these, 17 were built under the guidance of the noted bridge designer John A. McDonald and the 16 remaining are managed by the NSW Roads and Traffic Authority…
Sacrificial Cathodic Protection of Reinforced Concrete Bridges
Concrete deterioration due to reinforcement corrosion poses one of the greatest risks to the integrity of the Roads and Traffic Authority’s (RTA’s) bridge stock. As an alternative to Impressed Current Cathodic Protection (ICCP), the RTA is assessing…
The History and Service of Timber Howe Truss Bridges in Australia
The Howe truss was patented in USA initially in 1840 and again in 1850 and went on to become one of the primary timber truss designs used in North America. The adaptation of the Howe truss in NSW into the two distinct forms known as the “Allan” and…
Designing the Deconstruction of the Existing Newmarket Viaduct
The Newmarket Viaduct plays a vital role in the Auckland motorway network. The original 1966 structure is being demolished in tandem with construction of its replacement whilst keeping the motorway fully operational. The New Zealand Transport Agency…
Strategies for Structural Health Monitoring of Bridges
The needs for structural health monitoring in Japan originally come from its geographical conditions such as severe environment for deterioration and frequent natural disasters. Monitoring of the environment and loading conditions with respect to…
New Life for Old Masonry Arch Bridges
Where road schemes require an alteration to alignment, width, or barrier containment standards on an existing bridge, the problems associated with achieving this are often significant. Records for bridges built more than 50 years ago are commonly…
Developments in Modular Expansion Joint Technology: Codes and Testing
Great advances have been made in modular expansion joint technology since this most versatile type of joint was invented forty years ago, and the use of such joints, especially on very large bridges, has increased steadily. As a consequence,…
Fatigue of Road and Rail Bridges - Repair Techniques
A Consortium of the Welding Technology Institute of Australia (WTIA) members consisting of Australian Rail Track Corporation (ARTC), RailCorp, Roads and Traffic Authority of New South Wales (RTA), and Transport Main Roads (TMR), Queensland has…