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Benefits and Uses of FE Modelling in Bridge Assessment and Design
Structural analysis has progressed a long way from hand calculations and the use of distribution factors. From the first computer methods, grid and grillage analysis techniques evolved, leading through progressive enhancements to the advanced 3D…
Construction of a 50 Metre Long Ultra High Performance Ductile Concrete
One of the most significant breakthrough developments in concrete technology at the end of the 20th century was that of ultra-high performance ‘ductile’ concrete (UHPdC) with compressive strength up to 200 MPa and remarkable improvements in…
ABC-MHB004-11
  • ABC-MHB004-11
  • 31 Oct 2011
  • Bridges
Reinforced concrete made its way into road bridges at the start of the twentieth century after being invented by Joseph Monier in 1875. By 1950 reinforced concrete was dominant for small and medium spans and vying with steel for longer spans. Their…
Specifying Sulfate-Resisting Concrete
The Sulfate-resisting concrete is traditionally specified by cement type and concrete mix proportions in terms of maximum water-cement ratio and/or minimum cement content.
Testing and Specifying Chloride Resistance of Concrete
A wide range of test methods has been used to measure the resistance of concrete to chloride penetration. Each method is purported to measure the property of concrete central to the chloride transport mechanism into concrete. They include water…
Condition Assessment and Strengthening of Shear Connection Systems for Composite Bridges
Some old bridges in Australia were constructed with a deck system consisting of non-composite concrete slab over steel girders. The paper herein presents the methodology for structural retrofitting/ strengthening of these existing bridges based on…
Optimising Precast Bridge Girders for Sustainability with the use of High Performance Concrete
The standard Super-T bridge girders used in Australia were developed to provide optimum performance at a time when the maximum concrete grade covered by the bridge design code was 50 MPa. This paper examines the opportunities for improved…
Durability Assessment and Design for 100 Years Life in Aggressive Environments
The Banora Point Upgrade Alliance (BPA) project involves an upgrade of the 2.5 kilometer length of Pacific Highway through Banora Point, in northern NSW. The proposed upgrade will provide a link between the existing Chinderah bypass and Tweed…
RTA Study on the Use of Self-Compacting Concrete
Self-compacting concrete (also known as Super-workable concrete in Australia and Self-consolidating concrete in North America) is defined in EN 206 Part 9: Additional Rules for Selfcompacting Concrete (SCC) as concrete that is able to flow and…
Auckland Harbour Bridge Box Girder Strengthening Design and Construction
The economic vitality of Auckland depends upon the movement of people and freight around the city’s motorways and the Auckland Harbour Bridge (AHB) is a crucial component of the network. Traffic loads derived from weigh-in-motion (WIM) data measured…